Example Of Manipulating The Tree Structure - Hirschmann RS20 User Manual

Spanning Tree
5.5 Example of manipulating the
tree structure
The Management Administrator soon discovers that this configuration with
bridge 1 as the root bridge
path") is invalid. On the paths from bridge 1 to bridge 2 and bridge 1 to bridge
3, the control packets which the root bridge sends to all other bridges add up.
If 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
costs for most of the bridges to the root bridge have decreased.
P-BID = 40 960 P-BID = 20 480
Bridge 7 Bridge 4
Priority of the bridge identifikation (BID)
P-BID
= BID without MAC Address
Root path
Interrupted path
Figure 34: Example of manipulating the tree structure
UM Redundancy Configuration L2E
Release 7.1 12/2011
(see on page 67 "Example of determining the root
P-BID = 16 384
Bridge 2
Port 2
Port 1
P-BID = 36 864
Port 3
Bridge 6
5.5 Example of manipulating the tree
(see fig.
P-BID = 24 576 P-BID = 32 768
Bridge 3 Bridge 1
P-BID = 28 672
Bridge 5
structure
34). The path
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