Enabling The Extended System Id - Cisco 6500 Series Software Configuration Manual

Configuring STP
This example shows how to verify the configuration:
Router# show spanning-tree vlan 200
VLAN0200
Spanning tree enabled protocol ieee
Root ID
Bridge ID
Interface
---------------- ---- --- --------- -------- --------------------------------
Fa4/4
Fa4/5
Router#
You must have at least one interface that is active in VLAN 200 to create a VLAN 200 spanning tree. In
Note
this example, two interfaces are active in VLAN 200.

Enabling the Extended System ID

The extended system ID is enabled permanently on chassis that support 64 MAC addresses.
Note
You can enable the extended system ID on chassis that support 1024 MAC addresses (see the
"Understanding the Bridge ID" section on page
To enable the extended system ID, perform this task:
Command
Step 1
Router(config)# spanning-tree extend system-id
Router(config)# no spanning-tree extend system-id
Step 2
Router(config)# end
Step 3
Router# show spanning-tree vlan vlan_ID
Note 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.
Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
15-24
Priority 32768
Address 00d0.00b8.14c8
This bridge is the root
Hello Time 2 sec Max Age 20 sec
Priority 32768
Address 00d0.00b8.14c8
Hello Time 2 sec Max Age 20 sec
Aging Time 300
Role Sts Cost
Desg FWD 200000
Back BLK 200000
Chapter 15
Forward Delay 15 sec
Forward Delay 15 sec
Prio.Nbr Status
128.196 P2p
128.197 P2p
15-3).
Purpose
Enables the extended system ID.
Disables the extended system ID.
Note You cannot disable the extended system ID on
chassis that support 64 MAC addresses or when
you have configured extended range VLANs (see
"STP Default Configuration" section on
page 15-21).
Exits configuration mode.
Verifies the configuration.
Configuring STP and IEEE 802.1s MST
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