Hirschmann RS20 User Manual page 95

Spanning Tree

If there are multiple paths with the same root path costs, the bridge further
away from the root decides which port it blocks. For this purpose, it uses
the bridge identifiers of the bridge closer to the root. The bridge blocks the
port that leads to the bridge with the numerically higher ID (a numerically
higher ID is the logically worse one). If 2 bridges have the same priority,
the bridge with the numerically larger MAC address has the numerically
higher ID, which is logically the worse one.
 If multiple paths with the same root path costs lead from one bridge to the
same bridge, the bridge further away from the root uses the port identifier
of the other bridge as the last criterion
bridge blocks the port that leads to the port with the numerically higher ID
(a numerically higher ID is the logically worse one). If 2 ports have the
same priority, the port with the higher port number has the numerically
higher ID, which is logically the worse one.
UM RedundConfig L2P
Release 8.0 05/2013
6.2 Rules for Creating the Tree
(see figure 45). In the process, the
Structure
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