Bridge Parameters; Bridge Identifier - Hirschmann RS20 User Manual

Spanning Tree
5.1.2

Bridge parameters

In the context of Spanning Treee, each bridge and its connections are
uniquely described by the following parameters:


Bridge Identifier


Root Path Cost for the bridge ports,
 Port Identifier
5.1.3 Bridge Identifier
The Bridge Identifier consists of 8 bytes. The 2 highest-value bytes are the
priority. The default setting for the priority number is 32,768, but the
Management Administrator can change this when configuring the network.
The 6 lowest-value bytes of the bridge identifier are the bridge's MAC
address. The MAC address allows each bridge to have unique bridge
identifiers.
The bridge with the smallest number for the bridge identifier has the highest
priority.
MSB
80 00 00
Priority
Figure 28: Bridge Identifier, Example (values in hexadecimal notation)
60
80 63 51
MAC Address
5.1 The Spanning Tree Protocol
LSB
74 00
UM Redundancy Configuration L2E
Release 7.1 12/2011