Cisco Systems EA6500 Manual De Usuario

This example shows how to verify the configuration:

Router# show spanning-tree vlan 200 

VLAN0200

  Spanning tree enabled protocol ieee

  Root ID    Priority    32768

             Address     00d0.00b8.14c8

             This bridge is the root

             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32768

             Address     00d0.00b8.14c8

             Hello Time   2 sec  Max Age 20 sec  Forward Delay 15 sec

             Aging Time 300

Interface        Role Sts Cost      Prio.Nbr Status

---------------- ---- --- --------- -------- --------------------------------

Fa4/4            Desg FWD 200000    128.196  P2p 

Fa4/5            Back BLK 200000    128.197  P2p 

Router#

You must have at least one interface that is active in VLAN 200 to create a VLAN 200 spanning tree. In 
this example, two interfaces are active in VLAN 200.

The extended system ID is enabled permanently on chassis that support 64 MAC addresses.

You can enable the extended system ID on chassis that support 1024 MAC addresses (see the 

To enable the extended system ID, perform this task:

When you enable or disable the extended system ID, the bridge IDs of all active STP instances are 
updated, which might change the spanning tree topology.

Router(config)# spanning-tree extend system-id 

Enables the extended system ID. 

Router(config)# no spanning-tree extend system-id 

Disables the extended system ID.

You cannot disable the extended system ID on 
chassis that support 64 MAC addresses or when 
you have configured extended range VLANs (see 

Router(config)# end 

Exits configuration mode.

Router# show spanning-tree vlan vlan_ID 

Verifies the configuration.