Spanning Tree Protocol Configuration Guide, Cisco Catalyst IE9300 Rugged Series Switches

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Spanning Tree Protocol Configuration Guide, Cisco Catalyst IE9300 Rugged Series Switches

Configure VLAN forward delay time

Updated: March 2, 2026

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Learn how to configure the forward time of a VLAN to control how long an interface waits before changing from its spanning-tree learning and listening states to the forwarding state.

You can configure the forward time of a VLAN to control how long an interface waits before changing from its Spanning Tree learning and listening states to the forwarding state.

This task enables you to adjust the forwarding delay, which is the number of seconds an interface waits before transitioning states.

Before you begin

Perform these steps to configure forwarding-delay time.

Procedure

1.

Use the enable command to enter privileged EXEC mode.

Example:

Switch> enable

Enter your password if prompted.
2.

Use the configure terminal command to enter global configuration mode.

Example:

Switch# configure terminal
3.

Use the spanning-tree vlan forward-time command to configure the forward time of a VLAN.

Example:

Switch(config)# spanning-tree vlan 20 forward-time 10

The forwarding delay is the number of seconds an interface waits before changing from its Spanning Tree learning and listening states to the forwarding state.

For vlan-id, you can specify a single VLAN identified by VLAN ID number, a range of VLANs separated by a hyphen, or a series of VLANs separated by a comma. The values range from 1 to 4094.

For seconds, the values range from 4 to 30 and the default is 15.
4.

Use the end command to return to privileged EXEC mode.

Example:

Switch(config)# end