Trouble Ticket 5-1
Problem: Based on traffic analyzers, all traffic from the end stations in VLAN 10 destined to the core is flowing through SW2 when it should be flowing through SW1.
According to the topology, SW1 should be the root bridge for VLAN 10. Therefore, all traffic for VLAN 10 should be flowing through SW1 under normal conditions. With this in mind, check the placement of the root bridge using the show spanning-tree vlan 10 command on SW1, as shown in Example 5-15. Notice that SW1 is not the root bridge for VLAN 10. According to the root ID section of the output, the switch with the MAC address bbbb.bbbb.bbbb is the root bridge.
Example 5-15 show spanning-tree vlan 10 Command Output for SW1
SW1#show spanning-tree ...
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