840ug.book Page 1 Friday, July 7, 2000 2:23 PM ® OfficeConnect™ Remote 840 SDSL Router User’s Guide Release 1.2.0 http://www.3com.com/ Part No. 10031396 Rev.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145 Copyright © 1998, 3Com Corporation. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without written permission from 3Com Corporation.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM ABOUT THIS GUIDE Introduction 1 How to Use This Guide 2 Conventions 2 Document Notation 3 Safety Information 4 Additional Safety Information Year 2000 Compliance 5 5 1 OVERVIEW Introduction 1 - 1 What Is the OfficeConnect Remote 840? 1 - 2 What is an SDSL Modem? 1 - 3 What is ATM? 1 - 3 What is Frame Relay? 1 - 3 What is a BRouter? 1 - 4 Routing vs.
840ug.
840ug.
840ug.
840ug.
40ug.
840ug.
840ug.
840ug.
840ug.
840ug.
840ug.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM ABOUT THIS GUIDE Introduction This guide describes the features and advanced configuration of the OfficeConnectRemote 840 SDSL Router. The guide is intended for both first-time and experienced computer network users who are using the OfficeConnectRemote 840. For information on the initial configuration of the unit, see the OfficeConnect Remote 840 SDSL Router Installation Guide (included in the box when your purchased your Router).
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 2 ABOUT THIS GUIDE How to Use This Guide This table shows where to find specific information in this guide.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Document Notation 3 Table 2 Text Convention Convention Description Screen displays This typeface represents information as it appears on the screen. Syntax The word “syntax” means that you must evaluate the syntax provided and then supply the appropriate values for the placeholders that appear in angle brackets.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 4 ABOUT THIS GUIDE would access the IP sub-menu. Finally, from the IP sub-menu, you would access the ARP Table page. This is specified as Monitor > Networks > IP > ARP Table. When accessing a page that requires data entry, press the Help icon displayed in the Main area to obtain information about the each data field on the page.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM Year 2000 Compliance 5 ■ Do not use a telephone that is connected to the unit (other than a cordless type) during an electrical storm. There may be a remote risk of electric shock from lightning. ■ Do not spill food or liquids on the unit. If the unit gets wet, isolate the electrical supply and contact your 3Com reseller. ■ Do not push any objects into the openings of the unit.
840ug.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 1 Introduction OVERVIEW This chapter provides an overview of the OfficeConnect Remote 840.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 1-2 CHAPTER 1: OVERVIEW ■ What Is the OfficeConnect Remote 840? “Where to Find More Configuration Information” The OfficeConnect Remote 840 is a stand-alone BRouter with data interfaces to a Local Area Network (LAN) and a Wide Area Network (WAN). The Symmetric Digital Subscriber Line (SDSL) port composes the WAN interface, which can support Point-to-Point protocol (PPP), RFC 1483, or RFC 1490 connections.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM What is an SDSL Modem? 1-3 protocols as well as bridging, with support for learning bridge and 802.1d spanning tree functionality to eliminate loops. Other important features include: Routing Information Protocol (RIP), Simple Network Management Protocol (SNMP), address translation, telnet, and packet filtering. The web browser-based OfficeConnect Remote 840 Manager and the IP Wizard provide a user-friendly configuration interface.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 1-4 CHAPTER 1: OVERVIEW What is a BRouter? Routing vs. Bridging A BRouter is an interface between two networks, functioning as a router and/or a bridge. A router finds the best route between networks and provides network management capabilities. The OfficeConnect Remote 840 is a protocol independent router that does not rely on the workstations on a LAN for routing information, such as the destination location and best route.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM What is a Remote Site? 1-5 MAC layer addresses are pre-pended in the ethernet header over the Wide Area Connections. Address Resolution procedures (ARP), are used to dynamically learn the MAC address of the remote router.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM 1-6 CHAPTER 1: OVERVIEW within the same subnet. When the local side of the WAN interface has an assigned address, it is referred to as being "numbered." Otherwise, it is referred to as "unnumbered." For a more in-depth description of “numbered” versus “unnumbered” interfaces, see Appendix B, “IP Addressing”. When PPP is used, both the local and remote WAN addresses can by dynamically learned. Otherwise, they must be specified.
840ug.book Page 7 Friday, July 7, 2000 2:23 PM What is RFC 1490? 1-7 connection. RFC 1483 is a conduit for multiple protocols such as IP and IPX, which are encapsulated and passed across the communications datalink. The OfficeConnect Remote 840 supports RFC 1483 and can establish a RFC 1483 connection to other devices supporting RFC 1483.
840ug.book Page 8 Friday, July 7, 2000 2:23 PM 1-8 CHAPTER 1: OVERVIEW with an IP address for the workstation and the IP addresses of the default router and Domain Name Server. The OfficeConnect Remote 840 can be configured to be a DHCP Server, with a pool of up to 40 IP addresses. What is DNS? A Domain Name Server (DNS) provides an IP address to a host computer for a given domain name.
840ug.book Page 9 Friday, July 7, 2000 2:23 PM What Is Default Bridge Mode? 1-9 you choose this boot option, you will set up your workstation(s) for automatic IP address assignment. What Is Default Bridge Mode? The second operational mode is Default Bridge Mode. This mode preconfigures the unit to bridge all packets.
840ug.book Page 10 Friday, July 7, 2000 2:23 PM 1-10 CHAPTER 1: OVERVIEW OfficeConnect Remote 840 Panel Features Front Panel All LED and status information can be found on the front panel of the unit, while the power jack and ports are located on the back of the unit.
840ug.book Page 11 Friday, July 7, 2000 2:23 PM OfficeConnect Remote 840 Panel Features Back Panel 1-11 Below is a representation of the back panel of your SDSL router: Figure 1–5 OfficeConnect Remote 840 Back Panel ■ Power Inlet — The power port attaches to an external, 15-volt DC power supply included with the OfficeConnect Remote 840 package. The other end of the power supply cable connects to a standard electrical socket.
840ug.book Page 12 Friday, July 7, 2000 2:23 PM 1-12 CHAPTER 1: OVERVIEW configurations. See the table below for information about which switches to set for which configurations. Table 1–2 DIP Switch Modes DIP Switch 1 2 3 4 Mode off off off on Default Bridge Mode, Frame Relay, DLCI = 528, data encapsulated over RFC 1483. off off on off Default Bridge Mode, Frame Relay, DLCI = 16, data encapsulated over RFC 1490.
840ug.book Page 13 Friday, July 7, 2000 2:23 PM Configuration Overview Configuration Overview 1-13 The OfficeConnect Remote 840 configuration is divided into three areas: Local Site (LAN), Remote Site (WAN), and Global configuration. The following shows the areas of configuration for each.
840ug.book Page 14 Friday, July 7, 2000 2:23 PM 1-14 CHAPTER 1: OVERVIEW How to Manage the OfficeConnect Remote 840 ■ Test the network accessibility. ■ Ping a remote site ■ Check the routing tables on configured protocols You can manage the OfficeConnect Remote 840 either through the Command Line Interface (CLI) or through a web browser. If you choose to manage the unit through CLI, see the OfficeConnect Remote 840 SDSL Router CLI User's Guide, included on the CD shipped with your unit.
840ug.book Page 15 Friday, July 7, 2000 2:23 PM Starting the OfficeConnect Remote 840 Manager Starting the OfficeConnect Remote 840 Manager 1-15 To access the OfficeConnect Remote 840 Manager, either enter the unit's LAN IP address or DNS host name into the Location or Address field of your web browser. When entering the IP address or DNS host name you do not have to enter http:// (i.e., you can enter http://192.168.200.254 or simply 192.168.200.254).
840ug.book Page 16 Friday, July 7, 2000 2:23 PM 1-16 CHAPTER 1: OVERVIEW Using the OfficeConnect Remote 840 Manager All OfficeConnect Remote 840 Manager screens have three basic areas: Header Quick Link Area Main Area ■ Header — Shows the title of the current page being accessed. ■ Quick Link Area — Indicates the position of the current page in the OfficeConnect Remote 840 Manager menu hierarchy and provides links which allow quick access to the home page and the five menu options.
840ug.book Page 17 Friday, July 7, 2000 2:23 PM Where to Find More Configuration Information Online Help 1-17 The OfficeConnect Remote 840 Manager provides two methods of obtaining help. ■ The Online User's Guide. This guide contains detailed information about configuring and using your OfficeConnect Remote 840. You can access the Online User's Guide from the OfficeConnect Remote 840 Manager home page. ■ A detailed HTML help screen is available for each configuration page.
840ug.
840ug.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 2-2 CHAPTER 2: SYSTEM ADMINISTRATION Adding a Login 1 From the home page, select Configuration > Global > Administrator > Login. Click Add. The following screen fields appear: 2 Enter the following fields: ■ User Name — Enter the login or Telnet username in this field. ■ Password — Enter the login or Telnet password in the field. 3 After the fields have been entered, click Submit. To clear the fields, click Reset.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Modifying the Date and Time Modifying the Date and Time 2-3 This allows you to modify the system date and time. 1 From the home page, select Configuration > Global > Administrator > Date and Time. The screen with the following fields appear: 2 Enter the date and time information, utilizing the correct formats as shown next to the fields. 3 After the fields have been entered, click Submit. To clear the fields, click Reset.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 2-4 CHAPTER 2: SYSTEM ADMINISTRATION ■ Using the OfficeConnect Remote 840 Manager to Restore Defaults Reset button on the back of the unit. 1 Select Tools > Reboot. 2 Select the Delete all configuration and reboot device information option. 3 Click Submit. 4 Wait one minute. Then, configure an IP address if DHCP Smart Mode is not in use.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM Controlling SNMP Access 2-5 stations. These stations, the SNMP Managers, query the managed units for configuration and monitoring information. The OfficeConnect Remote 840 can be managed by SNMP Managers in read-only or read-write mode. Using SNMP to manage the OfficeConnect Remote 840 is more complicated than the preferred method of management, the OfficeConnect Remote 840 Manager. SNMP access is provided by an SNMP community name and access mode.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM 2-6 CHAPTER 2: SYSTEM ADMINISTRATION 4 Repeat steps 1-3 for each management station which is a part of this community. Be careful to have the Access box checked the same for each new member of the community. The entire community will be given the access rights of the last member. 5 To alter previously set Access Rights, follow step 1 and select the community from the community list and click Modify.
840ug.book Page 7 Friday, July 7, 2000 2:23 PM Assigning SNMP Trap Managers Assigning SNMP Trap Managers 2-7 An SNMP trap is an event that causes the OfficeConnect Remote 840 to send an unsolicited message to a SNMP manager. These events are generally critical events that indicate an operational problem. (Critical events can also be viewed on the OfficeConnect Remote 840 Manager's Monitor > Events > Critical Event Log screen.
840ug.book Page 8 Friday, July 7, 2000 2:23 PM 2-8 CHAPTER 2: SYSTEM ADMINISTRATION Assigning Syslog Managers A Syslog manager is a workstation that accepts and saves informational messages from a network device. The OfficeConnect Remote 840 Manager can be configured to send log messages to a syslog manager as follows: 1 From the home page, select Configuration > Global > Administrator > Syslog.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 3 Introduction Remote Site Overview REMOTE SITE MANAGEMENT This chapter provides an overview on managing remote site profiles using the web browser based OfficeConnect Remote 840 Manager. If you need information on setting up or initially configuring the unit, see the OfficeConnect Remote 840 SDSL Router Installation Guide.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 3-2 CHAPTER 3: REMOTE SITE MANAGEMENT ■ IPX — IPX network address information, static routes and services, and RIP usage. ■ Bridging — Bridging (enable / disable) to the remote site. If you need to connect to multiple remote sites such as the Internet and a remote office, you should set up a remote site profile for each location. Managing a Remote Site Profile Once created, remote site profiles can be enabled or disabled.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Managing a Remote Site Profile 3-3 4 Click Add. Then click Save Configuration on the sidebar to permanently save the changes. The Network Service (PPP and RFC 1483/ RFC 1490), ATM, and network protocol (Bridging, IP, and IPX) information has not been configured yet. To make a connection with the remote site you must configure the Network Service, ATM, and at least one network protocol.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 3-4 CHAPTER 3: REMOTE SITE MANAGEMENT Configuring Network Service Information (PPP / RFC 1483 / RFC 1490) A Network Service defines the data encapsulation and protocol characteristics for the connection between two packet switching devices. The OfficeConnect Remote 840 supports PPP, RFC 1483 and RFC 1490 Network Services. The OfficeConnect Remote 840 and the remote site must both use the same Network Service in order for a connection to be established.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM Configuring Network Service Information (PPP / RFC 1483 / RFC 1490) 3-5 4 Select the network service to be either RFC 1483, or PPP. If PPP, enter the Authentication Name and Authentication Password provided to you. You can change the header compression from the default of none to TCP/IP if you wish. 5 Click Next to proceed to the ATM Configuration screen.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM 3-6 CHAPTER 3: REMOTE SITE MANAGEMENT 6 Check the Enable Remote Site box. Configuring ATM Information The ATM parameters are supplied by your service provider. These parameters consist of: ■ ATM VC information ■ ATM Category of Service parameters ATM allows for permanent connections (PVCs) and switched connections (SVCs). For a PVC, the required VC information parameters consist of the Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI).
840ug.book Page 7 Friday, July 7, 2000 2:23 PM Configuring ATM Information ■ If PVC is selected, enter the VPI and VCI. ■ ■ ■ VPI — The Virtual Path Identifier (VPI) is part of the cell header for the cells that are transferred over this connection. VCI — The Virtual Channel Identifier (VCI) is part of the cell header for the cells that are transferred over this connection. If you are configuring multiple VCs, enter the number of the respective VC in this field.
840ug.book Page 8 Friday, July 7, 2000 2:23 PM 3-8 CHAPTER 3: REMOTE SITE MANAGEMENT maximum average rate or cells that are sent in bursts at a peak rate. ■ BT — The Burst Tolerance (also referred to as Maximum Burst Size), in cells/second. This is the maximum number of cells that can be sent at the peak rate. If no traffic shaping parameters have been provided you should choose the default parameter of UBR with a PCR value of 0.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 4 Introduction Overview CONFIGURING IP ROUTING This chapter contains information on configuring routing for IP protocol using the OfficeConnect Remote 840.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 4-2 CHAPTER 4: CONFIGURING IP ROUTING To configure IP routing, IP must be defined on both the LAN interface and one or more remote sites. On the LAN, an IP network must exist and it must have a specified IP address and subnet mask. On the remote sites, IP routing needs to be enabled, and the remote router address, a remote subnet mask and local WAN interface address need to be configured.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Configuring IP for the LAN 4-3 For routing to take place across the OfficeConnect Remote 840, you also have to set up a corresponding network over the WAN port (see “Configuring IP for the Remote Site Connection”). Use the Configuration > Local Site (LAN) > IP screen to define or modify all IP networks over the LAN. Note that all IP networks defined over the LAN only support Ethernet II framing.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 4-4 CHAPTER 4: CONFIGURING IP ROUTING Resetting Parameters Modifying or Deleting an IP Network If you need to return to the original parameters for this screen, click Reset before you click Add. To modify information pertaining to an existing IP network, or to delete that information from your configuration, follow these steps: 1 Proceed to the IP screen, following steps from the previous section. 2 Select an IP network you wish to modify or delete.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM Configuring IP RIP on the LAN Configuring IP RIP on the LAN Local Site (LAN) RIP 4-5 RIP is utilized as a means of communicating routing information between routers. This is done to keep the routers updated on information. The RIP options for the LAN can be accessed through Configuration > Local Site > IP.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM 4-6 CHAPTER 4: CONFIGURING IP ROUTING This brings up a screen containing the following fields: 1 You may enter the following fields: ■ Broadcast Address - Check one of two options: All Ones or All Zeroes. ■ Max Reassembly - Enter the maximum value that your network cannot exceed for this function. 2 Under the following two categories, you may customize your RIP: ■ Advanced RIP Policies - You may enable these options as necessary.
840ug.book Page 7 Friday, July 7, 2000 2:23 PM Configuring IP for the Remote Site Connection Configuring IP for the Remote Site Connection 4-7 To set up connections over the WAN, a remote site profile must be created and edited for each remote location you want to connect to. With this profile, you specify ATM virtual circuit information, protocols, and addresses that determine the method of connection and communication to that remote site.
840ug.book Page 8 Friday, July 7, 2000 2:23 PM 4-8 CHAPTER 4: CONFIGURING IP ROUTING Configure the Remote Site IP Network Information The following steps illustrate how you configure the remote site IP network information. 1 Complete the following entries: Local WAN IP Address: ■ If you were provided a single IP address, select Specified and enter that address.
840ug.book Page 9 Friday, July 7, 2000 2:23 PM Configuring IP for the Remote Site Connection 4-9 Remote WAN IP Address: ■ If you were provided a remote IP address and netmask, select Specified and type in that address and netmask. ■ If the OfficeConnect Remote 840 is learning the remote IP address from the remote site (PPP only), select Learn from Remote. 2 In order to have the remote site you are configuring as the default gateway, check the Use Remote as Default Gateway checkbox.
840ug.book Page 10 Friday, July 7, 2000 2:23 PM 4-10 CHAPTER 4: CONFIGURING IP ROUTING Configuring IP RIP on a Remote Site Access the RIP options for the WAN through Configuration > Remote Sites > IP. 1 Select a defined remote site connection from the list and click Modify. Keep clicking Next until you advance to the IP Modify screen. 2 You can select the RIP version to be either Broadcast, Broadcast & Listen, Listen or None.
840ug.book Page 11 Friday, July 7, 2000 2:23 PM Configuring IP Static and Framed Routes Configuring IP Static and Framed Routes 4-11 A Static route is a configured route that will remain in the routing table until deleted. Static routes differ from Dynamic routes in that Dynamic routes are learned real-time via RIP. A Framed route is much like a static route in that you manually configure the route.
840ug.book Page 12 Friday, July 7, 2000 2:23 PM 4-12 CHAPTER 4: CONFIGURING IP ROUTING 4 Click Manage in the Framed Routes box. 5 Click Add to define the following parameters: ■ Gateway (address) — The address of the neighbor router. ■ IP Route ■ Mask — The IP address for the mask. ■ Metric — The maximum number of routers (1-15) through which the data packets must travel before reaching their destination. 6 After you have entered the fields, click Submit.
840ug.book Page 13 Friday, July 7, 2000 2:23 PM Using IP Address Validation 4-13 Check or uncheck the IP Source Validation button to respectively enable or disable the IP source validation. MAC-Encapsulated Routing MAC-Encapsulated Routing combines routing and bridging so that routing features (i.e., Address Translation, DNS Proxy, DHCP Server, etc.) are available in a bridged environment. There are no specific changes required in the IP routing configuration to support MAC-Encapsulated Routing.
840ug.book Page 14 Friday, July 7, 2000 2:23 PM 4-14 CHAPTER 4: CONFIGURING IP ROUTING Monitoring The OfficeConnect Remote 840's IP Routing Table is displayed by accessing the following page: Monitor > Routes and Services > IP Routes. Global IP counters can be displayed through Monitor > Networks > IP > IP Counters. This screen indicates the number of frames received and forwarded or discarded. The active IP interfaces are shown by accessing the following page: Monitor > Networks > Network Status.
840ug.book Page 15 Friday, July 7, 2000 2:23 PM IP Testing (PING) 4-15 A Ping Response screen will appear, with the response from the ping. The following responses may occur. Ping Responses ■ is alive The PING was successful. If a name was entered in the Ping page input field, the corresponding IP address is displayed on the Response page.
840ug.book Page 16 Friday, July 7, 2000 2:23 PM 4-16 CHAPTER 4: CONFIGURING IP ROUTING The name could not be resolved. Either no DNS server was located or the server(s) did not have the name in the host table list. However, this error will also appear if the user entered an IP address incorrectly such as 100.100.100.256 (an invalid IP address) so it is interpreted as a name to be resolved by DNS. ■ Network Name: could not be resolved due to a timeout on the request.
840ug.book Page 17 Friday, July 7, 2000 2:23 PM IP Testing (PING) 4-17 C:\_ It is not unusual for the first few attempts to time out. If you don't receive a response the first time, try PINGing the router again. If you still don't receive a response, the most likely cause is incorrect routing entries. Option 3: Internet Browser (Internet Access Only) If you are connecting to the Internet, start a web browser and enter an address, such as http://www.3com.com.
840ug.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 5 Introduction Overview CONFIGURING BRIDGING This chapter contains information on configuring bridging for the OfficeConnect Remote 840. If you need more information on the difference between Bridging and Routing, and which one is best for your needs, see Appendix A,“Bridging and Routing”.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 5-2 CHAPTER 5: CONFIGURING BRIDGING To efficiently separate traffic, the bridge maintains a Bridge Forwarding Table. The table contains a list of MAC addresses and their associated network segments. The table is built dynamically from the source MAC addresses of data packets passing through the bridge. The OfficeConnect Remote 840 bridge supports the Spanning Tree Protocol (STP).
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Configuring Bridging for the LAN Configuring Bridging for the LAN 5-3 To configure a protocol over the LAN, you need to assign a protocol network to the LAN port by providing a name. After adding a network, you can modify advanced parameters. The network's status appears in the Monitor > Networks > Network Status table. For bridging to take place across the OfficeConnect Remote 840, you also have to enable bridging over the WAN port.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 5-4 CHAPTER 5: CONFIGURING BRIDGING Modifying or Deleting a Bridge Network To modify information pertaining to an existing Bridge network, or to delete that information from your configuration, follow these steps: 1 Proceed to the Bridge screen, following steps 1 and 2 above. 2 Select the bridge network you wish to modify or delete. 3 Click Modify/Delete.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM Bridging IP Traffic 5-5 For any routing to take place across the OfficeConnect Remote 840, you also have to set up a corresponding network over the LAN. See “Configuring Bridging for the LAN”. Enabling Bridging These instructions assume you have already added a remote site profile. If you have not added one, select Add instead of Modify in step 1 and see “Remote Site Management” for details on other parameters to configure.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM 5-6 CHAPTER 5: CONFIGURING BRIDGING IP Forwarding refers to the routing of IP packets from one interface to another. It does not affect communicating to the OfficeConnect Remote 840 itself. Even when IP Forwarding is disabled, you can perform non-routing functions such as use the OfficeConnect Remote 840 Manager from a Web browser and use PING. To bridge IP traffic: 1 Add the bridge network over the LAN (see the instructions above).
840ug.book Page 7 Friday, July 7, 2000 2:23 PM Bridge Firewall 5-7 the routed protocols configured by the profile (i.e., IP and/or IPX) will be sent using the appropriate bridged encapsulation. If the configured Network Service is PPP, the packets will be encapsulated in BRCP. MAC-Encapsulated Routing is configured on the Remote Sites General screen. To access the Remote Sites General screen: 1 Go to the OfficeConnect Remote 840 home page and select Configuration > Remote Sites (WAN).
840ug.book Page 8 Friday, July 7, 2000 2:23 PM 5-8 CHAPTER 5: CONFIGURING BRIDGING IPX routing is enabled if an IPX network is present over the Ethernet interface (see “Configuring IPX for the LAN” in Chapter 9). Bridging is enabled by adding a bridge network over the Ethernet interface (see “Configuring Bridging for the LAN”). Routing and bridging are enabled for each destination in its remote site profile.
840ug.book Page 9 Friday, July 7, 2000 2:23 PM Advanced Bridging Options 5-9 In general, a packet received in a routed encapsulation (i.e., IPCP or routed RFC 1483 or RFC 1490) is delivered to the router. A packet received in a bridged encapsulation is passed to the bridge. If MAC-Encapsulated Routing is enabled, the received (bridge-encapsulated) packets are delivered to the router.
840ug.book Page 10 Friday, July 7, 2000 2:23 PM 5-10 CHAPTER 5: CONFIGURING BRIDGING If you need to return to the original parameters for this screen, click Reset before you click Submit. 3 Click Submit when the fields have been entered to save your customizations. Default Bridge Mode Default Bridge Mode Overview Default Bridge Mode is designed for those who want to use their OfficeConnect Remote 840 to function as a bridge automatically, with no special configuration or software installation required.
840ug.book Page 11 Friday, July 7, 2000 2:23 PM Monitoring Bridging 5-11 You will need to tell your service provider to use a connection on VPI / VCI using RFC 1483 or RFC 1490 (bridged). Boot options only affect the operation of a unit which does not presently have any configuration settings (i.e., the unit is new, the reset button has been clicked, or a delete configuration command has been executed from the CLI or HTML interface).
0ug.book Page 12 Friday, July 7, 2000 2:23 PM 5-12 CHAPTER 5: CONFIGURING BRIDGING If you have problems with bridging IP, check that IP Forwarding is disabled on the Configuration > Global > IP > IP Settings screen. Also, be sure that your LAN IP Addresses belong to the same IP network as the remote site.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 6 Introduction NETWORK ADDRESS TRANSLATION USING THE OFFICECONNECT REMOTE 840 This chapter contains information on address translation using the OfficeConnect Remote 840.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 6-2 CHAPTER 6: NETWORK ADDRESS TRANSLATION USING THE OFFICECONNECT REMOTE 840 4 Under Address Translation, select Port Address Translation (PAT), Network Address Translation (NAT), or None (if you are not using address translation). If you selected PAT, you must enter the default IP address that will be used. Next you will click either Static TCP or Static UDP to select the Port Table type to be managed.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Configuring Static PAT Port Entries 6-3 Press the Modify button to set the address. Configuring Static PAT Port Entries Press the Static Transmission Control Protocol (TCP) or Static User Data Protocol (UDP) button to access the static port tables. ■ Static TCP — Press this button to access the static PAT TCP table (above). Using this table, you can map public TCP ports to private IP address / TCP port pairs.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 6-4 CHAPTER 6: NETWORK ADDRESS TRANSLATION USING THE OFFICECONNECT REMOTE 840 After Static Port Entries have been configured, return to the IP Advanced Modify screen and press the Modify button for the changes to take effect. Configuring NAT When NAT is configured, static mappings and/or dynamic pools of addresses must be configured. Static assignments permanently map a private address to a public address.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM Monitoring Monitoring 6-5 If PAT is used, the active port mappings are shown in the Monitor > Networks > NAT/PAT > Port Assignments screen. Only those mappings for the specified Remote Site will be displayed. This screen shows the active port mappings for both TCP and UDP connections. Each entry consists of the public and the private ports, the remote address and port number, and the value of the inactivity timer.
840ug.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 7 Introduction DHCP Overview CONFIGURING DHCP This chapter provides information on configuring the DHCP options for the OfficeConnect Remote 840. ■ “DHCP Overview” ■ “Configuring the DHCP Mode” ■ “Configuring the DHCP Server” ■ “Configuring the DHCP Relay” ■ “Monitoring DHCP” ■ “DHCP Smart Mode Overview” Dynamic Host Configuration Protocol (DHCP) is designed to provide a centralized approach to configuring IP addresses and parameters.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 7-2 CHAPTER 7: CONFIGURING DHCP The OfficeConnect Remote 840 can be configured to support up to 40 workstations on the local LAN. In addition, the OfficeConnect Remote 840 can be configured to be a DHCP Relay. When enabled, the Relay will process the broadcast request from the local workstation and send it to one or two remote DHCP servers. The response from the remote DHCP servers is processed and forwarded to the local workstation.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Configuring the DHCP Server Configuring the DHCP Server 7-3 The DHCP Server configuration screen contains the following fields: The OfficeConnect Remote 840's local LAN IP address should be entered in as the IP Default Router and also as the DNS Server if the DNS Proxy functionality is enabled. (For information on DNS Proxy, see “DNS Overview” in Chapter 8.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 7-4 CHAPTER 7: CONFIGURING DHCP Configuring the DHCP Relay If you selected Relay on the main DHCP screen, press the Configure DHCP Relay button. This screen contains the following fields: Enter the IP Addresses of one or two remote DHCP servers and specify the Max Hops (the maximum number of hops through other routers) to reach them. Enable or disable the relay service to them as needed and press the Submit button.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM DHCP Smart Mode Overview 7-5 IP LAN address: 192.168.200.254 DHCP IP address start: 192.168.200.1 IP address end: 192.168.200.40 IP Mask: 255.255.255.0 IP Default Router: 192.168.200.254 Default Lease: 4800 WINS Servers: 0.0.0.0 0.0.0.0 DNS Servers: 192.168.200.254 0.0.0.0 DNS Static Host entry: Domain Name: ocrdsl-3com.com IP address: 192.168.200.
840ug.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 8 Introduction DNS Overview CONFIGURING DNS This chapter provides information on configuring the DNS options for the OfficeConnect Remote 840. ■ “DNS Overview” ■ “Configuring DNS” ■ “Configuring Remote DNS Servers” ■ “Configuring Static DNS Host Entries” A Domain Name Server (DNS) provides an IP address to a host computer for a given domain name.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 8-2 CHAPTER 8: CONFIGURING DNS Configuring DNS To access the DNS configuration screens, go to the OfficeConnect Remote 840 Manager and select Configuration > Global > DNS. This screen contains the following fields: 1 To enable DNS services, check the Enable DNS box. 2 To specify the number of times the OfficeConnect Remote 840 will attempt to reach a primary or secondary DNS server, enter the number in the Number of Retries field.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Configuring Remote DNS Servers 8-3 Multiple DNS remote server entries can be added. The server is chosen based on the requested domain name. If a match is not found, the default entry is chosen. The default entry has a domain name of '*'. 1 Select the DNS Server List button from the DNS page. 2 To add a new entry, click Add. The following screen appears: 3 Enter the domain name for the entry, enter * for the default.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 8-4 CHAPTER 8: CONFIGURING DNS Configuring Static DNS Host Entries The OfficeConnect Remote 840 can function as a DNS server. 1 If you want to configure any Static DNS Entries, select Static DNS Entries and click Add. 2 Then enter the Domain Name and the Host IP Address of the machine that has that domain name and click Add.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 9 Introduction Overview CONFIGURING IPX ROUTING This chapter provides an overview on configuring IPX routing for the OfficeConnect Remote 840.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 9-2 CHAPTER 9: CONFIGURING IPX ROUTING Configuring IPX for the LAN To configure IPX over the LAN, assign an IPX network to the LAN port by providing a name and a network address. After adding a network you can modify advanced parameters. In order for the OfficeConnect Remote 840 to route traffic, you also have to set up a corresponding network over the WAN port. (See “Configuring IPX for Remote Sites Connection”.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Configuring IPX for Remote Sites Connection Modifying or Deleting an IPX Network 9-3 To modify information pertaining to an existing IPX network or to delete that information from your configuration, follow these steps: 1 Proceed to the IPX screen, following steps from the previous section. 2 Select an IPX network you wish to modify or delete. 3 Click Modify/Delete.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 9-4 CHAPTER 9: CONFIGURING IPX ROUTING If you need to connect to multiple remote sites (i.e., two remote offices) you can set up a remote site profile for each remote location. For any routing to take place across the OfficeConnect Remote 840, you also have to set up a corresponding network over the LAN. See “Configuring IPX for the LAN” for details. The IPX configuration for the remote site begins at the IPX Modify screen.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM Configuring IPX Static and Framed Routes 9-5 5 Check the correct box in the IPX WAN Network Address box. ■ Select Unnumbered to use the IPX address that is assigned to the Ethernet port, OR ■ If the remote site's network administrator provided you with a WAN IPX address, select Numbered Address. Enter the IPX address assigned to the WAN port. 6 To automatically learn IPX RIPs and SAPs, set the IPX Routing option to Both. 7 Check the Enable IPX checkbox.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM 9-6 CHAPTER 9: CONFIGURING IPX ROUTING 3 Define the Route by entering the following fields: ■ Network Address — The address of the network. ■ Gateway Network — The address of the router that joins the networks. ■ Gateway Node Address — The hardware address of the gateway node. ■ Metric — The number of routers (1-15) through which data packets travel before reaching their destination.
840ug.book Page 7 Friday, July 7, 2000 2:23 PM Configuring IPX Static and Framed Services 9-7 ■ IPX Network (address) — The IPX address of the network. ■ Metric — The number of routers (1-15) through which data packets travel before reaching their destination. ■ Ticks — A tick represents how far away the destination is for a data packet (in seconds). 6 After you have entered the fields, click Submit.
840ug.book Page 8 Friday, July 7, 2000 2:23 PM 9-8 CHAPTER 9: CONFIGURING IPX ROUTING Adding a Static IPX Service to a Local Site (LAN) To add a static IPX Service to a LAN: 1 Select Configuration > Global > IPX > IPX Services. 2 Click Add to define the following parameters of a static service: ■ Server Name — The name of the remote server. ■ Server Network Address — The network address of the remote server. ■ Server Node Address — The node address of the remote server.
840ug.book Page 9 Friday, July 7, 2000 2:23 PM Configuring IPX Static and Framed Services Adding a Framed IPX Service to a Remote Site (WAN) 9-9 To add, modify, or delete a framed service for a remote site: 1 Select Configuration > Remote Sites (WAN). 2 Select the remote site to modify, and click Modify. 3 Continue clicking Next to advance through the ATM Modify, IP Modify, IP Advanced Modify screens to get to the IPX Modify screen. 4 Click Framed Services.
840ug.book Page 10 Friday, July 7, 2000 2:23 PM 9-10 CHAPTER 9: CONFIGURING IPX ROUTING Configuring IPX RIP and SAP Local Site (LAN) RIP and SAP RIP is utilized as a means of communicating routing information between routers. This is done to keep the routers updated on information. Service Advertising Protocol (SAP) is a protocol used by IPX servers and routers to exchange information about the location of servers.
840ug.book Page 11 Friday, July 7, 2000 2:23 PM Configuring IPX RIP and SAP Remote Site (WAN) RIP and SAP 9-11 IPX RIP and SAP parameters can be configured on the remote site IPX Modify screen. Access this screen by going to the OfficeConnect Remote 840 home page. 1 Select Configuration > Remote Sites (WAN), and click Modify. This will access the Remote Sites General Modify Screen. 2 Continue clicking Next to advance through the ATM Modify, IP Modify, and IP Advanced Modify screens.
840ug.book Page 12 Friday, July 7, 2000 2:23 PM 9-12 CHAPTER 9: CONFIGURING IPX ROUTING IPX Routing Configuration to Support MAC-Encapsulated Routing Monitoring IPX Media Access Control (MAC)-Encapsulated Routing combines routing and bridging so that routing features (i.e., Address Translation, DNS Proxy, DHCP Server, etc.) are available in a bridged environment. There are no specific changes required in the IPX routing configuration to support MAC-Encapsulated Routing.
840ug.book Page 13 Friday, July 7, 2000 2:23 PM IPX Testing 9-13 For more information on these monitoring screens, see “Monitoring the OfficeConnect Remote 840” in Chapter 11.
840ug.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 10 Introduction Obtaining Updated OfficeConnect Remote 840 Software UPGRADING OPERATIONAL SOFTWARE FOR THE OFFICECONNECT REMOTE 840 This chapter details the updating of the OfficeConnect Remote 840 software.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 10-2 CHAPTER 10: UPGRADING OPERATIONAL SOFTWARE FOR THE OFFICECONNECT REMOTE 840 OfficeConnect Remote 840 CD If you have obtained an updated OfficeConnect Remote 840 CD, or if you have erased the copy of the OfficeConnect Remote 840 Operational Software from your hard drive, you need to copy the operational software from the CD to your hard drive. 1 Insert the OfficeConnect Remote 840 Installation CD in your PC's CD drive. 2 Click Start > Run.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Installing Operational Software to the OfficeConnect Remote 840 Unit 10-3 browser with the pathname of the new NAC file. The browser will then load this file into the unit's FLASH memory. Finally, you will reboot the unit to allow the new operational software to become active. The software update process does not change configuration of the OfficeConnect Remote 840.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 10-4 CHAPTER 10: UPGRADING OPERATIONAL SOFTWARE FOR THE OFFICECONNECT REMOTE 840 5 Change to the directory containing the new operational software. If you obtained the software from the Installation CD or using Instant Update the default directory is c:\Program Files\3Com\ocr840. The DL.BAT batch file uses the Com 1 port by default. You can change the port used by editing the DL.BAT file. The relevant lines of the file are shown below.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 11 Introduction MONITORING THE OFFICECONNECT REMOTE 840 This chapter describes the details for performing the system monitoring on the OfficeConnect Remote 840.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 11-2 CHAPTER 11: MONITORING THE OFFICECONNECT REMOTE 840 The throughput is displayed as line graphs that move from left to right across the screen. The color-coded list of remote site names to the right of the graphs correspond to the colored lines on the graph. A maximum of four remote sites are monitored simultaneously. Performance is measured in kilobytes per second (Kbps), with samples taken every five seconds.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Ethernet Interface 11-3 Figure 11–1 Throughput Graphs Ethernet Interface Interface Status The Interface Status screen provides real-time information about the interfaces. To bring up this screen, from the OfficeConnect Remote 840 Manager home page, select Monitor > Interface Status. Ethernet interface information is displayed in the row containing the interface name eth:1.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 11-4 CHAPTER 11: MONITORING THE OFFICECONNECT REMOTE 840 Ethernet Counters The Ethernet counters screen shows real-time counters based on data packets that cross the Ethernet interface. Access this screen from the OfficeConnect Remote 840 Manager home page by selecting Monitor > Ethernet. The counters displayed include the number of bytes transmitted, bytes received, and errors. Error counters may not increment consistently.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM 11-5 Interface Status ATM Status The Interface Status screen provides real-time information about the interfaces. To bring up this screen, from the OfficeConnect Remote 840 Manager home page, select Monitor > Interface Status. ATM interface information is displayed in the row containing the interface name atm:1 or hdlc:1. The Oper Status column indicates whether the interface link is operationally up or down. If it is down, there may be a cabling problem.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM 11-6 CHAPTER 11: MONITORING THE OFFICECONNECT REMOTE 840 The information includes Cell Delineation status, Data and Idle Cell counters, and error detection, all of which are used to determine the health of your ATM link. A few error counts are not unusual but errors which increment consistently should be reported to your service provider.
840ug.book Page 7 Friday, July 7, 2000 2:23 PM Remote Site Connection 11-7 Remote Site Connection Connection Traffic/Error Counters You can view remote site connection traffic and error counters. From the OfficeConnect Remote 840 Manager home page select Monitor > Remote Sites > Remote Site Counters. Then select the remote site name from the list and press the Show button. The counters include the number of packets and bytes transmitted and received and error counters.
840ug.book Page 8 Friday, July 7, 2000 2:23 PM 11-8 CHAPTER 11: MONITORING THE OFFICECONNECT REMOTE 840 Frame Relay VC Site Counters Remote Site Status Table To view a complete list of configured remote site profiles and their status, access the Remote Site Status screen by selecting Monitor > Remote Sites > Remote Site Status. The status table includes the configured network service, VPI and VCI for each remote site as well as the operational status of the profile.
840ug.book Page 9 Friday, July 7, 2000 2:23 PM IP 11-9 and the network address assigned to the connection. IP and IPX WAN network names incorporate the name of the remote site profile. Below is an example of a network status table. IP Routing Table: The IP routing table contains the list of all IP routes known by the OfficeConnect Remote 840. To view the IP routing table, go to the OfficeConnect Remote 840 Manager home page and select Monitor > Routes and Services > IP Routes.
840ug.book Page 10 Friday, July 7, 2000 2:23 PM 11-10 CHAPTER 11: MONITORING THE OFFICECONNECT REMOTE 840 IP, TCP, UDP, ICMP Counters and Tables The OfficeConnect Remote 840 Manager provides various counters and tables for the IP, TCP, UDP and ICMP protocols. To get to the counter and table screens, go to the OfficeConnect Remote 840 Manager home page and select Monitor > Networks > IP.
840ug.book Page 11 Friday, July 7, 2000 2:23 PM Address Translation 11-11 Each lease table entry lists the IP address and lease duration assigned to each client hardware (MAC) address. DHCP Counters You can obtain detailed statistics and error counters for the DHCP protocol. Access this screen from the OfficeConnect Remote 840 Manager home page by selecting Monitor > Networks > DHCP > DHCP Counters.
840ug.book Page 12 Friday, July 7, 2000 2:23 PM 11-12 CHAPTER 11: MONITORING THE OFFICECONNECT REMOTE 840 location. The mapped addresses table keeps track of private-to-public address mappings. Table of Port Assignments The OfficeConnect Remote 840 address translation process also creates a dynamic port assignment table when NAT or PAT is used. To access this table from the OfficeConnect Remote 840 Manager home page, select Monitor > Networks > NAT/PAT.
840ug.book Page 13 Friday, July 7, 2000 2:23 PM IPX 11-13 IPX IPX Networks IPX networks are created when you configure IPX over the LAN and when a remote site connection is established that is configured to route IPX traffic. To view the list of IPX networks and their status, bring up the Network Status screen. This screen list the status of all OfficeConnect Remote 840 IP, IPX, and Bridge networks.
840ug.book Page 14 Friday, July 7, 2000 2:23 PM 11-14 CHAPTER 11: MONITORING THE OFFICECONNECT REMOTE 840 configured statically. The protocol type of RIP indicates routes that were learned from IPX RIP information exchange with other routers. IPX Services The IPX services table contains the list of all IPX servers known to the OfficeConnect Remote 840. To view the IPX services table, go to the OfficeConnect Remote 840 Manager home page and select Monitor > Routes and Services > IPX Services.
840ug.book Page 15 Friday, July 7, 2000 2:23 PM Events Logs 11-15 The screen capture below provides an example of the network status table. Forwarding Table The bridge forwarding table is used for forwarding packets and contains the list of learned media access control (MAC) addresses. To access this table, go to the OfficeConnect Remote 840 home page and select Monitor > Routes and Services > Bridge Forwarding Table.
840ug.book Page 16 Friday, July 7, 2000 2:23 PM 11-16 CHAPTER 11: MONITORING THE OFFICECONNECT REMOTE 840 Connection Event Log The connection event log contains a text description of WAN interface events. This includes cell delineation detection as well as the progress of remote site connections. To access this log, from the OfficeConnect Remote 840 Manager home page, select Monitor > Events > Connection Events.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 12 Introduction CONFIGURING FILTERS The OfficeConnect Remote 840 provides an extensive set of data filtering capabilities. For instance, filters can accept packets only from specific addresses to provide added security, or filters can be added to reduce network traffic and improve overall performance. This chapter contains information on the filtering capabilities for your OfficeConnect Remote 840.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 12-2 CHAPTER 12: CONFIGURING FILTERS Filtering Capabilities Filter Classes The OfficeConnect Remote 840 provides an extensive set of data filtering capabilities. The OfficeConnect Remote 840 supports the following filtering capabilities: ■ Input and output data filtering. ■ Source and destination address filtering. ■ Protocol filtering. ■ Source and destination port filtering.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Filtering Capabilities 12-3 Table 12–1 Data Filters Advertisement Filters Filter Action IP Controls network access based on the protocol and source/destination address. IP filter rules allow filtering based on the source address, destination address, protocol type, source port, and port designation of the IP packet. IPX Controls network access based on the protocol and source/destination network.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 12-4 CHAPTER 12: CONFIGURING FILTERS Creating generic filters can be a complex task. Only experienced users should employ generic filters, and strictly in cases where data and advertising filters cannot provide the filtering capabilities that you require. Creating Filters Overview Filters can be set one of two ways in the OfficeConnect Remote 840: ■ Using Command Line Interface (CLI). (See Appendix D for instructions to access the CLI.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM Creating Filters Using the OfficeConnect Remote 840 Manager 12-5 The first is the direction/location of the packet. There are four static direction/locations on which filters can be activated: incoming LAN traffic, outgoing LAN traffic, incoming WAN traffic and outgoing WAN traffic. Additionally, there are two for each Remote Site, traffic coming from and going to each one.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM 12-6 CHAPTER 12: CONFIGURING FILTERS Example: To prevent seven individual PCs on the LAN from accessing a remote site, create the following two filters: Filter for Packets: Going to Remote Site Vienna Filter Name: Block PCs 1-6 Protocol: IP Enabled: Yes Discard Packet if IP Source Address is Equal to 192.168.200.41 or if IP Source Address is Equal to 192.168.200.50 or if IP Source Address is Equal to 192.168.200.66 or if IP Source Address is Equal to 192.
840ug.book Page 7 Friday, July 7, 2000 2:23 PM Creating Filters Using the OfficeConnect Remote 840 Manager 12-7 to. This allows you to go beyond the bounds of the “canned” condition sentences. An overview and description of each filter screen is provided below: You can get out of any screen by using the HTML side bar links.
840ug.book Page 8 Friday, July 7, 2000 2:23 PM 12-8 CHAPTER 12: CONFIGURING FILTERS ■ ■ ■ ■ Enable or disable the filter. (You may want to create a disabled filter, then enable it when you are satisfied that the filter conditions are complete.) Select the protocol for the filter being added. The protocols are: Basic IP, Advanced IP, Basic IPX, Advanced IPX, Basic Bridge, and Advanced Bridge. Pressing the Next button brings up the condition screen for the selected protocol.
840ug.
840ug.
840ug.book Page 11 Friday, July 7, 2000 2:23 PM Creating Filters Using the OfficeConnect Remote 840 Manager 12-11 ■ Use the Cancel button to cancel any changes since the last time you saved. When you have a filter that contains “And”ed and “Or”ed conditions together, the summary may display extra blank lines between conditions. This is to help you understand exactly what the filter means. Look at this filter (without the extra separator): Discard packet if IP Destination Address is Equal to 30.0.0.
840ug.book Page 12 Friday, July 7, 2000 2:23 PM 12-12 CHAPTER 12: CONFIGURING FILTERS Step-by-Step Guide to Creating Filters Using the OfficeConnect Remote 840 Manager Filters can be tricky to define so spend time before accessing the screens thinking about what you want the filter to do.
840ug.book Page 13 Friday, July 7, 2000 2:23 PM Step-by-Step Guide to Creating Filters Using the OfficeConnect Remote 840 Manager 12-13 As before, select the condition sentence, choose the keyword and operation and enter the filter value then press “Next” to see the Condition Summary screen again. 7 When you are satisfied that this filter is complete, press Save Filter on the Condition Summary screen. This causes the OfficeConnect Remote 840 to write the filter to file and activates the filter.
840ug.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM 13 Introduction Troubleshooting Tools TROUBLESHOOTING This chapter contains information on the troubleshooting tools and the troubleshooting areas for your OfficeConnect Remote 840.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM 13-2 CHAPTER 13: TROUBLESHOOTING ■ CLI Traces — Tracing can be turned on for various OfficeConnect Remote 840 software components using the CLI set facility command. This feature is for advanced troubleshooting and should only be used after all other methods for isolating the problem have been tried. You may find the trace statements to be cryptic. CLI traces are not accessible through the OfficeConnect Remote 840 Manager.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM LAN Connection Problems LAN Connection Problems 13-3 Symptom Possible Causes Corrective Action The LAN LED is Off. The OfficeConnect Remote 840 Manager Interface status indicates Ethernet interface is down. The LAN cable is not connected. Check that one end of the LAN cable is fully plugged into the LAN port. Check that the other end is fully plugged into the local LAN connection. The LAN cable has been damaged.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM 13-4 CHAPTER 13: TROUBLESHOOTING Symptom Possible Causes Corrective Action The workstation does If the workstation is supposed to not have an IP learn its address from the address. OfficeConnect Remote 840, check that the unit is set up in DHCP Smart Mode. If not, set to DHCP Smart Mode and reset. If the workstation was booted before the OfficeConnect Remote 840, reboot the workstation now.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM IP Wizard and Web Browser Problems Symptom Possible Causes The Web browser does There is a problem not find the with the LAN OfficeConnect Remote connection. 840 using its DNS name (DHCP Smart Mode in use). 13-5 Corrective Action See “LAN Connection Problems”. The workstation is on Set the workstation IP configuration a different IP subnet to automatically learn its IP address from the 840’s from the 840. subnet.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM 13-6 CHAPTER 13: TROUBLESHOOTING WAN Connection Problems Symptom Possible Causes SDSL LED is Off. WAN (modem) cable OfficeConnect Remote is not connected. 840 Manager Interface Status indicates that interface atm:1/hdlc:1 is down. Corrective Action Check that one end of the WAN cable is fully plugged into the wall. Check that the other end is fully plugged into the SDSL port in the back of the OfficeConnect Remote 840.
840ug.book Page 7 Friday, July 7, 2000 2:23 PM General Network Connection Problems General Network Connection Problems Symptom Possible Cause Correction Action Remote network is not responding (e.g. to PINGs or the Web browser connection requests.) LAN or WAN connection problem. 1 See “LAN Connection Problems” and “WAN Connection Problems”. 13-7 2 Go to Monitor > Networks > Network Status to view more detailed problem, then take corrective action.
840ug.book Page 8 Friday, July 7, 2000 2:23 PM 13-8 CHAPTER 13: TROUBLESHOOTING Symptom Possible Cause Correction Action If your Network Service Enter the appropriate PPP is PPP, the PPP Username and Password in the Authentication remote site profile. information may be incorrect. Check connection event log (Monitor > Events > Connection Event Log) to see if the PPP connection could not be established due to a PAP or CHAP mismatch. Remote network is not responding (e.g.
840ug.book Page 9 Friday, July 7, 2000 2:23 PM IP Network Connection Problems Symptom Possible Cause Accessing remote The SDSL settings information is slower indicate that a slower than expected. baud rate than expected was negotiated for the downstream traffic. 13-9 Correction Action Reset the SDSL link to cause re-negotiation through one of the following steps: ■ If the OfficeConnect Remote 840 is accessible, disconnect the SDSL line for a few seconds. ■ Save the current configuration and reboot.
840ug.book Page 10 Friday, July 7, 2000 2:23 PM 13-10 CHAPTER 13: TROUBLESHOOTING Symptom Possible Cause Corrective Action Some remote sites use Wait 30 seconds and try to access the RIP protocol to remote site again. advertise your IP address to other routers. It may take more than 30 seconds for the IP route to the OfficeConnect Remote 840 to be propagated throughout the remote network. IP routing table does not show a route to the remote network, indicating a configuration problem.
840ug.book Page 11 Friday, July 7, 2000 2:23 PM IP Network Connection Problems 13-11 Symptom Possible Cause Corrective Action My video application does not run when Port Address Translation (PAT) is enabled. Some video applications using UDP streaming have two connections, a TCP connection for control and a UDP stream for data. The TCP connection is initiated from the privately addressed workstation but the video stream may be initiated from the remote server.
840ug.book Page 12 Friday, July 7, 2000 2:23 PM 13-12 CHAPTER 13: TROUBLESHOOTING IPX Network Connection Problems Symptom Possible Cause Corrective Action Remote IPX network is not responding (ex., can't find a Novell server). LAN or WAN connection problem, or a general configuration problem. See “LAN Connection Problems”, “WAN Connection Problems”, and “General Network Connection Problems”. IPX is not enabled over both the LAN and the WAN.
840ug.book Page 13 Friday, July 7, 2000 2:23 PM Bridge Connection Problems 13-13 Bridge Connection Problems Symptom Possible Cause Corrective Action Remote network is not responding. LAN or WAN connection problem, or a general configuration problem. See “LAN Connection Problems”, “WAN Connection Problems”, and “General Network Connection Problems”. Bridging is not enabled Check the Local Site > Bridge and over both the LAN and Remote Site > Modify screens and the WAN.
840ug.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM A Introduction BRIDGING AND ROUTING During the initial configuration of the OfficeConnect Remote 840, you must decide whether to configure the unit as a bridge or as a router. If you are unsure which option you should choose, this section will help you decide. Bridges and routers are used to connect networks together.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM A-2 APPENDIX A: BRIDGING AND ROUTING Guidelines for Choosing Bridging or Routing How Bridges Learn The list below outlines some of the reasons you might choose to configure the OfficeConnect Remote 840 as a bridge or a router. Read through the rest of this section for more explanation and to help decide which of the above conditions apply to your network.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM How Bridges Learn A-3 address table, the bridge knows the destination is on the LAN and therefore discards or filters the frame. If the destination address is not in the address table, the bridge transmits the data across the bridge. It does this even if the destination device is on the local LAN because it does not recognize the destination station as local.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM A-4 APPENDIX A: BRIDGING AND ROUTING Figure A–1 Simple Remote Bridging The OfficeConnect Remote 840 uses RFC 1483 or PPP encapsulation to connect with other OfficeConnect Remote 840 or third party devices. Building a Larger Network Large networks of interconnected LANs can be established by using multiple bridges as illustrated in Figure A-2. The bridges build up their address tables. In Figure A-2, Bridge 1 examines packets from its WAN ports.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM How Bridges Learn A-5 not be placed on LAN A. Therefore, frames passing between LAN B and LANs C or D will not impact the overall performance of the LAN. Figure A–2 Multiple Remote Bridge Multiple Paths Between Bridge LANs With only a single physical path between LANs, the network is susceptible to link and bridge failures. In the event of a failure, the connection between any of the LANs upstream or downstream from the point of failure will be broken.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM A-6 APPENDIX A: BRIDGING AND ROUTING other bridges detect this and reconfigure their ports so that there is once again an active data path through the network. Network Topology If your network topology is star shaped, a combination of analog modems and bridging is usually the most efficient and successful option. Routing is a better solution if your network is a complex mix of WAN interconnects and/or multiple protocols.
840ug.book Page 7 Friday, July 7, 2000 2:23 PM Network Organization, Structure, and Physical Layout The Internet Routing IP A-7 The protocol adopted by the Defense Data Network (DDN) for the Internet, is based on obtaining and abiding by, a registered Internet address range. This makes a router the ideal choice for accessing the Internet. Unfortunately, new applicants are only likely to get a Class C registered Internet address, preventing more than 254 connections on one bridged IP LAN.
840ug.book Page 8 Friday, July 7, 2000 2:23 PM A-8 APPENDIX A: BRIDGING AND ROUTING are able to share the same Class B network address, regardless of their location on the bridged network. Figure A–4 Open Systems Interconnection Network Layer Model Open Systems Interconnection Network Layer Model A routing environment allows stations to communicate indirectly. Following the example in under “Routing IP”, let us assume that a station on LAN 1 wants to communicate with a network server on LAN 2.
840ug.book Page 9 Friday, July 7, 2000 2:23 PM IP Routing A-9 Once the packet is received by the Router A, attached to LAN 1, it strips off the network header (refer to Figure above) and examines the Layer 3 header information. It then reviews its routing tables in order to establish where to forward the data packet. It is possible that the LAN 1 router has multiple outgoing ports that would allow different transmission routes to the destination network.
840ug.book Page 10 Friday, July 7, 2000 2:23 PM A-10 APPENDIX A: BRIDGING AND ROUTING The algorithm will automatically select to forward the data packet via Router A, as this route contains the least number of hop counts which makes it the preferred direct route.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM IP ADDRESSING B Introduction to IP Addressing This section contains a brief introduction to the IP addressing scheme for administrators that are new to the IP protocol. IP Addressing Basics IP addresses are 32 bits long and generally written in what is called dotted decimal notation: four decimal values separated by periods. For example: 192.77.203.5.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM B-2 APPENDIX B: IP ADDRESSING be host 28 on subnetwork 63 of that network. The network itself would be called 128.5.0.0 (Class B network number 5). Notice that by using subnet masks, you can define a natural hierarchy in which the addresses themselves indicate how a packet is to be routed. However, all routing devices on an IP network must be using the same subnetting scheme.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM IP Addressing Basics B-3 Class B network described above, an address of 128.5.255.255 is a broadcast address meaning the packet is destined for all nodes on the entire Class B network. 128.5.63.255 would be a broadcast address indicating that the packet is destined for all nodes on subnet 63 of that Class B network. However, one rare version of TCP/IP instead considers an address in which the host bits are all set to 0 a broadcast address.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM B-4 APPENDIX B: IP ADDRESSING can be, but does not have to be, the same as the netmask for any other supernet. As in subnetting, a netmask creates a division between the network portion of an address and the host portion of an address. However, since the network you are defining is larger than a Class C network, the division you are creating is not in the fourth octet of the address.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM IP Addressing Basics B-5 with OfficeConnect Remote 840. The first option permits you to set the subnet via numerical (8-30 bits) designation. For example: add ip network houston address 192.75.202.99/23 Secondly, you can specify a class designation: A, B, or C. You can also leave the subnet value blank and let the OfficeConnect Remote 840 choose it for you. In this case, however, OfficeConnect Remote 840 will specify a class setting based on the IP address.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM B-6 APPENDIX B: IP ADDRESSING To route IP, the two networks to be linked by the OfficeConnect Remote 840 (local LAN and the ISP's or remote site's network) must be on separate IP subnets. For example, all local LAN devices could be on subnet 192.168.1 and all devices in at the remote site could be on subnet 192.168.2. Put another way, all devices connected to the local LAN must be assigned IP addresses that begin with 192.168.1, for example 192.168.1.
840ug.book Page 7 Friday, July 7, 2000 2:23 PM IP Addressing Basics B-7 2xx.xxx.188.176, and the subnet mask, 255.255.255.248, together to determine the number of addresses we had to work with. First, we convert the last octet (the eight-bit decimal equivalent) of the IP address (176) and the last octet of the subnet mask (248) to binary: 176 248 The 0s in the subnet mask define our address range, and their three binary positions (23) yield eight addresses.
840ug.book Page 8 Friday, July 7, 2000 2:23 PM B-8 APPENDIX B: IP ADDRESSING exists when an IP address identifies the interface as belonging to a specific IP network or subnet (See Figure B-1). Figure B–1 Numbered WAN Interfaces An unnumbered link exists when the IP address 0.0.0.0 is assigned and indicates the interface does not belong to a specific network (see Figure B-2). Figure B-2 Unnumbered WAN Interfaces The major advantage of using unnumbered links is that you save scarce IP address space.
840ug.book Page 9 Friday, July 7, 2000 2:23 PM IP Addressing Basics B-9 Ethernet interface. This IP address is the source IP address for router-generated packets going out unnumbered interfaces. The router's routing tables and default gateway settings take care of getting the data traffic to the correct remote destinations. Therefore, although you cannot PING or TELNET to the WAN interface when unnumbered is in use, you can PING or TELNET the router using the IP address of a numbered interface.
840ug.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM C Overview ADDRESS TRANSLATION TUTORIAL Public IP addresses are registered and can be used within a public network, such as the Internet. Due to the limitation of IP version 4 address space and the growth of the Internet, public addresses are becoming more scarce. One solution to this problem is to use private addresses on small LANs and to use Address Translation when accessing devices on the public network.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM C-2 APPENDIX C: ADDRESS TRANSLATION TUTORIAL Network Address Translation (NAT) With NAT, a pool of public addresses is configured and dynamically mapped to a private workstation address when accesses are made through the gateway to a public network. The public-to-private address mapping remains active until the privately-addressed workstation stops accessing the public network. The public address is then returned to the available pool of addresses.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Network Address Translation (NAT) C-3 provides a firewall and hides the private local network from the outside world. Figure C–1 NAT Example Dynamic NAT When a local PC sends a packet destined for the WAN, the OfficeConnect Remote 840 puts the private source IP address and an IP address from the pool into an address translation table.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM C-4 APPENDIX C: ADDRESS TRANSLATION TUTORIAL Static NAT Port Address Translation (PAT) Static NAT operates like Dynamic NAT except you may add entries to the address translation table and indicate specific IP addresses from the pool to map to specific private LAN IP addresses. This allows controlled access by the outside world. PAT is used when several privately addressed workstations share a single public address.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM Port Address Translation (PAT) C-5 Doing this provides a firewall and hides the private local network from the outside world. Figure C–2 PAT Example Dynamic PAT When a local PC sends a packet destined for the WAN, the OfficeConnect Remote 840 puts its source IP address and a port number into an address translation table. The port number is also placed into the data packet.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM C-6 APPENDIX C: ADDRESS TRANSLATION TUTORIAL world. You would select the port numbers based on the type of access needed. For example, if you had a local WEB server, you would select the IP address of your server and the port number 80, which is the UDP and TCP port number used to indicate HTML traffic.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM D Overview USING THE CLI GUIDE The preferred method of configuring and managing the OfficeConnect Remote 840 SDSL Router is the Web Browser based Remote 840 Manager. It also comes with a sophisticated Command Line Interface (CLI). A command line interface will require you to type in individual commands on the screen.
840ug.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM E CONFIGURATION (NON-SETUP WIZARD) OF THE OFFICECONNECT REMOTE 840 This chapter describes the details for performing the initial configuration of a OfficeConnect Remote 840 when the unit has not been configured or has been restored to factory defaults. This installation method does not use the Setup Wizard. If you want to use Setup Wizard, please refer to the printed Installation Guide that came with your OfficeConnect Remote 840.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM E-2 APPENDIX E: CONFIGURATION (NON-SETUP WIZARD) OF THE OFFICECONNECT REMOTE 840 If your unit is using Frame Relay, this will access the Remote Sites General Add screen, containing the following fields: ■ Enter a name to identify the remote site. ■ Enter the Max Packet Size. ■ Set Network Service to PPP over Frame Relay or RFC 1490. ■ Enter the DLCI.
840ug.book Page 3 Friday, July 7, 2000 2:23 PM Instructions for Internet Access E-3 If your unit is using ATM, the Remote Sites General Add screen will contain the following fields: ■ Enter a name to identify the remote site. ■ Set Network Service to PPP over Frame Relay or RFC 1483. ■ If PPP, enter the Authentication Name and Authentication Password provided to you. You can change the header compression from the default of none to TCP/IP if you wish.
840ug.book Page 4 Friday, July 7, 2000 2:23 PM E-4 APPENDIX E: CONFIGURATION (NON-SETUP WIZARD) OF THE OFFICECONNECT REMOTE 840 Step 2: Configuring the Remote Site ATM Parameters (ATM Only) The ATM Modify screen is to be filled in with information from the Configuration Planning Forms in Chapter 1 of the Installation Guide. The screen contains the following fields: 1 Enter the information in these fields as contained in the Configuration Planning Forms.
840ug.book Page 5 Friday, July 7, 2000 2:23 PM Instructions for Internet Access E-5 1 Configure the Local WAN IP Address: ■ If the ISP provided you with a single IP address, select Specified and enter that address. ■ If you are using PPP to dynamically assign an address, select Dynamic, and the remote site on the WAN will assign a local WAN IP address to you. ■ Otherwise, select Unnumbered, and there will be no IP address assigned to the VC connection.
840ug.book Page 6 Friday, July 7, 2000 2:23 PM E-6 APPENDIX E: CONFIGURATION (NON-SETUP WIZARD) OF THE OFFICECONNECT REMOTE 840 ■ If you want to run RIP, select from the pull-down menu to have the RIP set to Broadcast, Listen, or Broadcast & Listen, and if one of these is chosen, set the RIP option to RIPV1 or RIPV2. ■ Ensure that Enable IP is checked (enabled). 2 Press the Next button to proceed to the IP Advanced Modify screen.
840ug.book Page 7 Friday, July 7, 2000 2:23 PM Instructions for Telecommuting / Remote Office Access E-7 4 Press the Modify button before leaving this screen to save the changes. 5 If you are also going to configure the router for Telecommuting / Remote Office Access, continue to the next section. Otherwise, go to Using the Configuration Audit.
840ug.book Page 8 Friday, July 7, 2000 2:23 PM E-8 APPENDIX E: CONFIGURATION (NON-SETUP WIZARD) OF THE OFFICECONNECT REMOTE 840 ■ Enter the DLCI. ■ Check the Enable Bridging and/or Enable MAC Encapsulated Routing boxes as needed. If your unit is using ATM, the Remote Sites General Add screen will contain the following fields: ■ Enter a name to identify the remote site. ■ Set Network Service to PPP over Frame Relay or RFC 1483.
840ug.book Page 9 Friday, July 7, 2000 2:23 PM Instructions for Telecommuting / Remote Office Access Step 2: Configuring the Remote Site ATM Parameters E-9 The ATM Modify screen shown below is to be filled in with information from the Configuration Planning Table you completed in Chapter 1 of the Installation Guide. 1 Enter the information in these fields as contained in the Configuration Planning Table in Chapter 1 of the OfficeConnect Remote 840 SDSL Router Install Guide.
840ug.book Page 10 Friday, July 7, 2000 2:23 PM E-10 APPENDIX E: CONFIGURATION (NON-SETUP WIZARD) OF THE OFFICECONNECT REMOTE 840 Step 3: Configuring the Remote Site IP Network Information 1 If you are routing with IP, complete the entries on this screen. Otherwise, press Next. 2 Local WAN IP Address: ■ If the remote site administrator provided you with a single IP address, select Specified and enter that address.
840ug.book Page 11 Friday, July 7, 2000 2:23 PM Instructions for Telecommuting / Remote Office Access E-11 ■ If the remote site administrator provided a remote IP address and netmask, select Specified and type in that address and netmask. ■ If the OfficeConnect Remote 840 is learning the remote IP address from the remote site (PPP only), select Learn From Remote. ■ In order to have the remote site you are configuring act as the default gateway, check the Use Remote as Default Gateway checkbox.
840ug.book Page 12 Friday, July 7, 2000 2:23 PM E-12 APPENDIX E: CONFIGURATION (NON-SETUP WIZARD) OF THE OFFICECONNECT REMOTE 840 You cannot use an unnumbered Local IP WAN Address and have PAT enabled. 6 If you are routing IPX, press the Next button to proceed to the IPX Modify screen. If you are not routing IPX, press Modify to complete the remote site configuration. Step 4: Configuring the Remote Site IPX Network Information 1 If you are routing IPX, complete the entries in this page.
840ug.book Page 13 Friday, July 7, 2000 2:23 PM Using the Configuration Audit E-13 5 5 Press the Save Configuration button on the sidebar to save the settings you just entered. Step 5: Configuring a Local IPX Network If you are setting up the OfficeConnect Remote 840 to route IPX, follow these steps. 1 From the OfficeConnect Remote 840 home page, select Configuration > Local Site (LAN) > IPX > Add.
840ug.book Page 14 Friday, July 7, 2000 2:23 PM E-14 APPENDIX E: CONFIGURATION (NON-SETUP WIZARD) OF THE OFFICECONNECT REMOTE 840 Read the explanation of the audit topics and categories to help you interpret the results of the audit by selecting the audit topics at the bottom of the page. Notice that a link is provided at the bottom of each audit topic's configuration page if changes are needed.
840ug.book Page 1 Friday, July 7, 2000 2:23 PM F TECHNICAL SUPPORT 3Com provides easy access to technical support information through a variety of services. This appendix describes these services. Information contained in this appendix is correct at time of publication. For the very latest, 3Com recommends that you access the 3Com Corporation World Wide Web site.
840ug.book Page 2 Friday, July 7, 2000 2:23 PM F-2 APPENDIX F: TECHNICAL SUPPORT ■ A list of system hardware and software, including revision levels ■ Diagnostic error messages ■ Details about recent configuration changes, if applicable If you are unable to contact your network supplier, see the following section on how to contact 3Com.
840ug.
840ug.
840ug.
840ug.
840ug.
840ug.
840ug.
840ug.
840ug.
840ug.
840ug.
840ug.
840ug.book Page 13 Friday, July 7, 2000 2:23 PM 3Com Corporation LIMITED WARRANTY This warranty applies to customers located in the United States, Australia, Canada (except Quebec), Ireland, New Zealand, U.K., and other English language countries, and countries for which a translation into the local language is not provided.
840ug.book Page 14 Friday, July 7, 2000 2:23 PM Dead- or Defective-on-Arrival. In the event a product completely fails to function or exhibits a defect in materials or workmanship within the first forty-eight (48) hours of installation but no later than thirty (30) days after the date of purchase, and this is verified by 3Com, it will be considered dead- or defective-on-arrival (DOA) and a replacement shall be provided by advance replacement.
840ug.book Page 15 Friday, July 7, 2000 2:23 PM FCC CLASS B STATEMENT This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1 This device may not cause harmful interference, and 2 This device must accept any interference received, including interference that may cause undesired operation.
840ug.
