Installation manual

CHAPTER 4. Functions of OfficeServ 7400

4-6

4.3 Data Server Functions

The OfficeServ 7400 functions as router, switches, performs security function, or serves as

data network applications or data access interfaces (WAN, LAN, DMZ). The OfficeServ

7400 functions as router, switches, performs security function, or serves as data network

applications or data access interfaces.

4.3.1 Switches

802.1w Rapid Spanning Tree

Rapid Spanning Tree Protocol (RSTP) provides rapid convergence of the spanning tree and

provides for fast reconfiguration critical for networks carrying delay-sensitive traffic such

as voice and video. The specification for RSTP is IEEE 802.1w-2001. The RSTP

specification for provides compatibility with legacy STP based networks.

802.1w Rapid Spanning Tree and PVST+ (Per VLAN STP)

The RSTP (Rapid Spanning Tree Protocol) ensures fast convergence time to the network

topology organized by the switch, and provides fast network reconfiguration to the network

traffics sensible to delays such as voice or video. The RSTP is defined in the IEEE 802.1w-

2001, and ensures compatibility with the actual STP (802.1d) based network.

Supports the PVST+ which provides a Spanning Tree for each VLAN.

802.1p Packet Priority

The switch extracts the priority field from the Ethernet frame configured according to the

802.1p specification standard, and discriminatively processes the frame according to the

priority of the specified operation standard.

The packets are categorized into emergent packets and non-emergent packet and are

processed.

VLAN (802.1Q)

The Virtual Local Area Network (VLAN) groups the related equipment by the work group

according to the LAN operational policy regardless of the location of the user equipment.

The VLAN also processes switching for the work groups. The VLAN removes the effects

of unnecessary broadcasting packet and configures the stable switching subnet only for the

corresponding group by separating and processing the group in the virtual LAN.

Accordingly, the switch can provide the differentiated QoS services and the VLAN can be

configured based on the switch port and MAC address.

The system automatically configures the VLAN for the IP telephone, signal process

gateway, media gateway, and UMS required for services of the OfficeServ 7400, and

performs the QoS process. The OfficeServ 7400 provides 32 VLAN groups.