Configuring A Secondary Root Bridge - Cisco Nexus 3000 Series Configuration Manual

Configuring a Secondary Root Bridge

Step 3
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
Step 1
Step 2
Cisco Nexus 3000 Series NX-OS Layer 2 Switching Configuration Guide, Release 6.x
94
Command or Action
secondary} [diameter dia
[hello-time hello-time]]
switch(config)# no spanning-tree
mst instance-id root
Command or Action
switch# configure terminal
switch(config)# spanning-tree
mst instance-id root {primary |
secondary} [diameter dia
[hello-time hello-time]]
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.
Purpose
Enters global 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.
Configuring Multiple Spanning Tree
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