Switch User Manual

Bridge Conﬁguration

11-2 Conﬁguring Device-Level Bridging Parameters

Figure 11-1. Bridge ConÞguration

You can conÞgure the following bridging parameters:

Virtual LAN ID

This ID is only used in an 802.5 Source Route environment and is normally

assigned by a system administrator. It is the ID number that is inserted into the

Token Ring RIF Þeld representing the internal virtual ring for LLC2 or bridged

trafÞc.

Each Virtual LAN ID must be unique among all LAN IDs throughout the network

on which this device will operate.

Forwarding Table Size

Under the Spanning Tree concept, bridges automatically maintain forwarding

tables by exchanging messages (BPDUs) with other bridges on the network. By

using the information in the forwarding tables, bridges determine single paths for

trafÞc between endpoints (assuming there are multiple paths.)

This Þeld determines the maximum number of entries allowed in the bridgeÕs

forwarding table. The actual number may be limited by available memory. The

default value for this parameter is 65535.

Source Route Bridge ID

This ID is only used in a 802.5 Source Route environment. If the outgoing port is

conÞgured as a Source Route bridge, it is necessary for the FRX or SmartSwitch

1800 to generate the Routing Information Field (RIF) in forwarded frames. This

Bridge ID supplies the Source Route Bridge ID that will be inserted into the RIF.