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Configuring and
Managing STP Fast
Convergence
Features
Configuring and Managing STP Fast Convergence Features
Changing the STP Forwarding Delay
To change the forwarding delay, use the following command:
set spantree fwddelay delay {all | vlan vlan-id}
Specify a delay from 4 through 30 seconds. The default is 15 seconds.
The all option applies the change to all VLANs. Alternatively, specify an
individual VLAN.
To change the forwarding delay on VLAN pink to 20 seconds, type the
following command:
WX1200# set spantree fwddelay 20 vlan pink
success: change accepted.
Changing the STP Maximum Age
To change the maximum age, use the following command:
set spantree maxage aging-time {all | vlan vlan-id}
Specify an age from 6 through 40 seconds. The default is 20 seconds.
The all option applies the change to all VLANs. Alternatively, specify an
individual VLAN.
To change the maximum acceptable age for root bridge hello packets on
all VLANs to 15 seconds, type the following command:
WX1200# set spantree maxage 15 all
success: change accepted.
The standard STP timers delay traffic forwarding briefly after a topology
change. The time a port takes to change from the listening state to the
learning state or from the learning state to the forwarding state is called
the forwarding delay. In some configurations, this delay is unnecessary.
The WX switch provides the following fast convergence features to
bypass the forwarding delay:
Port fast
Backbone fast
Uplink fast
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