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Web OS 10.0 Application Guide
Example of a Four-Switch Topology with a Single Spanning Tree
In the four-switch topology example shown in
switch A has a higher priority, you can have at least three loops on the network:
n
Data flowing from Web switches A to B to C and back to Web switch A.
n
Data flowing from Web switches A to C to D and back to Web switch A
n
Data flowing from Web switches A to B to C to D and back to Web switch A.
With a single Spanning Tree environment, as shown in
blocked to prevent loops on the network. It is possible that the blocks may be between Web
switches C and D and between Web switches B and C, depending on the bridge priority, port
priority, and port cost. The two blocks would prevent looping on the network, but the blocked
link between Web switches B and C will inadvertently isolate VLAN 3 altogether.
N
OTE
10.0 Command Reference.
Web Switch D
Figure 2-4 VLAN 3 Isolated in a Single Spanning Tree Group
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52
Chapter 2: VLANs
–
For more information on bridge priority, port priority, and port cost see the Web OS
Figure 2-4 on page
Figure
Web Switch A
STG 1
Blocked Port
Web Switch C
52, and assuming Web
2-4, you will have two links
Web Switch B
212777-A, February 2002
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