Configuring The Hello Time; Configuring The Forwarding-Delay Time For A Vlan - Cisco Catalyst 2950 Software Manual

Chapter 9 Configuring STP

Configuring the Hello Time

You can configure the interval between the generation of configuration messages by the root switch by
changing the STP hello time.
Note Exercise care when using this command. For most situations, we recommend that you use the
spanning-tree vlan vlan-id root primary and the spanning-tree vlan vlan-id root secondary global
configuration commands to modify the hello time.
Beginning in privileged EXEC mode, follow these steps to configure the STP hello time of a VLAN:
Command
Step 1 configure terminal
Step 2 spanning-tree vlan vlan-id hello-time seconds
Step 3 end
Step 4
show spanning-tree vlan vlan-id bridge [brief]
Step 5
copy running-config startup-config
To return the switch to its default setting, use the no spanning-tree vlan vlan-id hello-time global
configuration command.

Configuring the Forwarding-Delay Time for a VLAN

Beginning in privileged EXEC mode, follow these steps to configure the STP forwarding-delay time for
a VLAN:
Command
Step 1 configure terminal
Step 2
spanning-tree vlan vlan-id forward-time
seconds
Step 3
end
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Purpose
Enter global configuration mode.
Configure the hello time of a VLAN.
The hello time is the interval between the generation of
configuration messages by the root switch. These messages
mean that the switch is alive.
For vlan-id, the range is 1 to 1005. Do not enter leading zeroes.
For seconds, the range is 1 to 10 seconds; the default is 2
seconds.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Configure the forward time of a VLAN.
The forward delay is the number of seconds a port waits before
changing from its STP learning and listening states to the
forwarding state.
For vlan-id, the range is 1 to 1005. Do not enter leading zeroes.
For seconds, the range is 4 to 30 seconds; the default is 15
seconds.
Return to privileged EXEC mode.
Catalyst 2950 Desktop Switch Software Configuration Guide
Configuring Basic STP Features
9-27