Cisco 7609 - Configuring the Maximum Aging Time for a VLAN; Enabling Rapid-PVST

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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 configure the forward delay time for VLAN 200 to 21 seconds:
Router# configure terminal
Router(config)# spanning-tree vlan 200 forward-time 21
Router(config)# end
Router#
This example shows how to verify the configuration:
Router# show spanning-tree vlan 200 bridge
Hello Max Fwd
Vlan Bridge ID Time Age Delay Protocol
---------------- -------------------- ---- ---- ----- --------
VLAN200 49152 0050.3e8d.64c8 2 20 21 ieee
Router#
Configuring the Maximum Aging Time for a VLAN
To configure the STP maximum aging time for a VLAN, perform this task:
This example shows how to configure the maximum aging time for VLAN 200 to 36 seconds:
Router# configure terminal
Router(config)# spanning-tree vlan 200 max-age 36
Router(config)# end
Router#
This example shows how to verify the configuration:
Router# show spanning-tree vlan 200 bridge
Hello Max Fwd
Vlan Bridge ID Time Age Delay Protocol
---------------- -------------------- ---- ---- ----- --------
VLAN200 49152 0050.3e8d.64c8 2 36 15 ieee
Router#
Enabling Rapid-PVST
Rapid-PVST uses the existing PVST+ framework for configuration and interaction with other features. It also
supports some of the PVST+ extensions.
To enable Rapid-PVST mode on the switch, enter the spanning-tree mode rapid-pvst command in
privileged mode. To configure the switch in Rapid-PVST mode, see the “Configuring STP” section on
page 15-22.
Command Purpose
Step 1
Router(config)# spanning-tree vlan vlan_ID
max-age max_age
Configures the maximum aging time of a VLAN. The
max_age value can be from 6 to 40 seconds. The vlan_ID
value can be 1 through 4094, except reserved VLANs (see
Table 9-1 on page 9-2).
Router(config)# no spanning-tree vlan vlan_ID
max-age
Reverts to the default maximum aging time.
Step 2
Router(config)# end
Exits configuration mode.
Step 3
Router# show spanning-tree vlan vlan_ID bridge
[detail]
Verifies the configuration.