Cisco 7609 User Manual

15-24
Cisco 7600 Series Router Cisco IOS Software Configuration Guide—12.1E
78-14064-04
Chapter 15 Configuring STP and IEEE 802.1s MST
Configuring STP
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#
Note 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.
Enabling the Extended System ID
Note 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
“Understanding the Bridge ID” section on page 15-3).
To enable the extended system ID, perform this task:
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.
Command Purpose
Step 1
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.
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).
Step 2
Router(config)# end
Exits configuration mode.
Step 3
Router# show spanning-tree vlan vlan_ID
Verifies the configuration.

Cisco 7609 Specifications

General

Brand	Cisco
Model	7609
Category	Network Router
Language	English