Hirschmann GREYHOUND GRS1020, Reference Manual

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Redundancy
12.3 Spanning Tree
166
UM Config GRS
Release 8.0 09/2019
When the Management Administrator configures bridge 2 as the root bridge, the burden of the
control packets on the subnetworks is distributed much more evenly. The result is the configuration
shown here (see figure 39) . The path costs for most of the bridges to the root bridge have
decreased.
Figure 39: Example of manipulating the tree structure
5
P-BID = 32 768
7
P-BID = 32 768 P-BID = 32 768
3
P-BID = 32 768
1
P-BID = 32 768
2
P-BID = 16 384
P-BID = 32 768
6
4
Port 1
Port 2
Root-Bridge
MAC 00:01:02:03:04:06
MAC 00:01:02:03:04:05
Root path
Interrupted path
P-BID
Priority of the bridge identifikation (BID)
= BID without MAC Address