Pilz PSSnet SHL 8T MRP - Manual (Page 56)

Rapid Spanning Tree
56
4.1 The Spanning Tree Protocol
PSSnet SHL - Redundancy Configuration
Pilz GmbH & Co. KG, Felix- Wankel Str. 2, 73760 Ostfildern
4.1.2 Bridge parameters
Each bridge is uniquely described using parameters:
X Bridge Identifier
X Root Path Costs for the bridge ports
X Port Identifier
4.1.3 Bridge Identifier
The Bridge Identifier consists of 8 bytes. The two 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 six lowest-value bytes of the bridge identifier are the MAC address of the
bridge. The MAC address guarantees that every bridge has a different bridge
identifier.
The bridge with the smallest number for the bridge identifier has the highest
priority.
Figure 28: Bridge Identifier
MAC Address Priority
LSB MSB