debug 802.1w timer

Debugs the RSTP (802.1w) timer expiration.
Syntax
debug 802.1w timer vlan decimal
no debug 802.1w timer vlan decimal
Parameters
decimal
Refers to the number of the VLAN.
Modes

Privileged EXEC mode

Examples

If the timer is enabled, output similar to the following is displayed. 

device# debug 802.1w timer vlan 2
device# RSTP[db6fd]: Timer Alert - helloWhen timer_expired On port 1/1/2(1) ,
VLAN 2
RSTP[db6fd]: Timer Alert - helloWhen timer_expired On port 1/1/9(8) , VLAN 2
RSTP[db711]: Timer Alert - helloWhen timer_expired On port 1/1/2(1) , VLAN 2
RSTP[db711]: Timer Alert - helloWhen timer_expired On port 1/1/9(8) , VLAN 2
RSTP[db725]: Timer Alert - helloWhen timer_expired On port 1/1/2(1) , VLAN 2
RSTP[db725]: Timer Alert - helloWhen timer_expired On port 1/1/9(8) , VLAN 2
RSTP[db739]: Timer Alert - helloWhen timer_expired On port 1/1/2(1) , VLAN 2

If the timer is disabled, output similar to the following is displayed. 

device# no debug 802.1w timer vlan 2
RSTP Disabling Timer Debugging for VLAN 2
Parent topic: Debug Commands A - G