Port Identifier - Hirschmann RS20 User Manual

Spanning Tree 4.1 The Spanning Tree Protocol
4.1.5

Port Identifier

The Port Identifier consists of 2 bytes. One part, the least-significant byte,
contains the physical port number. This provides a unique identifier for each
port of the bridge. The second part is the port priority, which can be set by the
Administrator (default value: 128). It also applies here that the port with the
smallest number for the port identifier has the highest priority.
MSB LSB
Priority Port number
Figure 16: Port Identifier
Redundancy L2B
45
Release 6.0 07/2010