Installation manual

OfficeServ 7400 System Description

IGMP Snooping

L2 switch (located in the lower layer of the IP router) without the IGMP (Internet Group

Management Protocol) function is located between the IP router and multicast group

member (host), intercepts the IGMP message. And then the L2 switch operates in the IP

router like the group member and operates in the group member like the IP router, which is

referred as the IGMP Snooping.

The IP layer multicast group information included in the IGMP message is reflected in the

MAC filtering database, its own switching database. The group information is processed in

the MAC multicast address format mapped with the IP multicast address.

802.1x Supported

IEEE 802.1x Standards defines the formats and the operation procedures of EAP over LAN

(EAPoL) frame that can send/receive the Extensible Authentication Protocol (EAP)

between terminals and Access Point (AP). These standards are called the port security

protocol because they can be used in the procedure permitting the network access of the

terminal only by acquiring the physical port license of Bridge or wireless AP from the

authentication server. This performance of the authentication procedure by ports enables

the control of charging policies, usage restriction, or band allocation, etc separately by

ports.

Port Trunking Function Supported

Port Trunking means Port Aggregation that collects the physical ports into the logical ones.

That is, like the 100 BASE-TX securing 100M bandwidth, the function collects those many

ports into the logical port for expanding the bandwidth to be used.

PoE (IEEE 802.3af) Function Supported

Power over Ethernet (PoE) is designed so that no additional power supply to the network

equipments used in wireless AP or other wired LAN is necessary. PoE allows the user to

send the data and the power simultaneously via one Ethernet cable, which reduces the

installation cost in most cases as well as provides the high flexibility in selecting the

installation site of the wireless AP and the network equipments.

QoS Function Supported

OfficeServ 7400 provides the function of 802.1p Packet Priority and Level Classification

Setup for supporting the Quality of Service (QoS). The 802.1p Packet Priority is the

expansion of the standard MAC header in the network packet. This expansion provides the

packets with priority by using 3-bit. The packet of the higher priority is treated

preferentially and is processed ahead than the packet of the lower priority.

The Level Classification Setup function gives the packets the levels of High/Low and

processes them according to their levels, which makes the differential services possible.