Cisco Systems OL-8335-02 Using the CLI to Configure Spanning Tree Protocol, Default 2 seconds

Chapter 3 Configuring Ports and Interfaces

Configuring Ports

	Table 3-7	Controller Spanning Tree Parameters (continued)
	Parameter		Description
	Hello Time (seconds)		The length of time that the controller broadcasts hello messages to
			other controllers.
			Options: 1 to 10 seconds
			Default: 2 seconds
	Forward Delay (seconds)		The length of time that each of the listening and learning states lasts
			before the port begins forwarding.
			Options: 4 to 30 seconds
			Default: 15 seconds
Step 9	Click Save Configuration to save your changes.

Using the CLI to Configure Spanning Tree Protocol

Follow these steps to configure STP using the CLI.

Step 1 Enter show spanningtree port and show spanningtree switch to view the current STP status.

Step 2 If STP is enabled, you must disable it before you can change STP settings. Enter config spanningtree switch mode disable to disable STP on all ports.

Step 3 Enter one of these commands to configure the STP port administrative mode:

•config spanningtree port mode 802.1d {port-numberall}

•config spanningtree port mode fast {port-numberall}

•config spanningtree port mode off {port-numberall}

Step 4 Enter one of these commands to configure the STP port path cost on the STP ports:

•config spanningtree port pathcost 1-65535{port-number all}—Specifies a path cost from 1 to 65535 to the port.

•config spanningtree port mode pathcost auto {port-numberall}—Enables the STP algorithm to automatically assign the path cost. This is the default setting.

Step 5 Enter config spanningtree port priority 0-255port-numberto configure the port priority on STP ports. The default priority is 128.

Step 6 If necessary, enter config spanningtree switch bridgepriority 0-65535to configure the controller’s STP bridge priority. The default bridge priority is 32768.

Step 7 If necessary, enter config spanningtree switch forwarddelay 4-30to configure the controller’s STP forward delay in seconds. The default forward delay is 15 seconds.

Step 8 If necessary, enter config spanningtree switch hellotime 1-10to configure the controller’s STP hello time in seconds. The default hello time is 2 seconds.

Step 9 If necessary, enter config spanningtree switch maxage 6-40to configure the controller’s STP maximum age. The default maximum age is 20 seconds.

Cisco Wireless LAN Controller Configuration Guide

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