IBM BladeCenter - Page 157

A
B
C
D
Blocked
Blocked
VLAN 1VLAN 1
VLAN 1VLAN 1
VLAN 1VLAN 1
VLAN 2VLAN 2
VLAN 2VLAN 2
VLAN 2VLAN 2
Trunk
In this example, the VLAN definitions are extended to switches A and B. This gives
only a single blocked port per VLAN and enables the removal of all redundant links
by removing switch A or B from the network.
Appendix D. Understanding and troubleshooting the Spanning Tree Protocol 139