Cisco Nexus 7000 Series Configuration Manual page 174

Configuring an MST Secondary Root Bridge
DETAILED STEPS
Command or Action
Step 1
config t
Example:
switch# config t
switch(config)#
Step 2 Enter one of the following commands:
Option
spanning-tree mst
instance-id root
{primary | secondary}
[diameter dia[hello-time
hello-time]]
no spanning-tree mst
instance-id root
Example:
switch(config)# spanning-tree mst 5 root secondary
Step 3
exit
Example:
switch# exit
switch(config)#
Step 4 show spanning-tree mst
Example:
switch# show spanning-tree mst
Step 5
copy running-config startup-config
Example:
switch(config)# copy running-config startup-config
Cisco Nexus 7000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.x
158
Description
Configures a device 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 Layer 2 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.
Returns the switch priority, diameter, and hello-time
to default values.
Configuring MST Using Cisco NX-OS
Purpose
Enters global configuration mode.
Exits global configuration mode.
(Optional)
Displays the MST configuration.
(Optional)
Copies the running configuration
to the startup configuration.