Cisco Systems N3KC3048TP1GE secondary diameter dia hello-time hello-time, Procedure, Purpose

Configuring Multiple Spanning Tree

Configuring a Secondary Root Bridge

Command or Action

secondary} [diameter dia [hello-time hello-time]]

Step 3 switch(config)# no spanning-tree mst instance-idroot

Purpose

•For instance-id, you can specify a single instance, a range of instances separated by a hyphen, or a series of instances separated by a comma. The range is from 1 to 4094.

•For diameter net-diameter, specify the maximum number of hops between any two end stations. The default is 7. This keyword is available only for MST instance 0.

•For hello-time seconds, specify the interval in seconds between the generation of configuration messages by the root bridge. The range is from 1 to 10 seconds; the default is 2 seconds.

(Optional)

Returns the switch priority, diameter, and hello time to default values.

This example shows how to configure the switch as the root switch for MSTI 5:

switch# configure terminal

switch(config)# spanning-tree mst 5 root primary

Configuring a Secondary Root Bridge

You can execute this command on more than one switch to configure multiple backup root bridges. Enter the same network diameter and hello-time values that you used when you configured the primary root bridge with the spanning-tree mst root primary configuration command.

Procedure

Command or Action

Step 1 switch# configure terminal

Step 2 switch(config)# spanning-tree mst instance-idroot {primary secondary} [diameter dia [hello-time hello-time]]

Purpose

Enters configuration mode.

Configures a switch as the secondary root bridge as follows:

•For instance-id, you can specify a single instance, a range of instances separated by a hyphen, or a series of instances separated by a comma. The range is from 1 to 4094.

•For diameter net-diameter, specify the maximum number of hops between any two end stations. The default is 7. This keyword is available only for MST instance 0.

•For hello-time seconds, specify the interval in seconds between the generation of configuration messages by the root bridge. The range is from 1 to 10 seconds; the default is 2 seconds.

	Cisco Nexus 3000 NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U3(1)
104	OL-26590-01