Cisco Nexus 7000 Series Configuration Manual page 172

Configuring the Root Bridge
SUMMARY STEPS
1. config t
2. Enter one of the following commands:
3. Enter one of the following commands:
4. (Optional) show spanning-tree mst
5. (Optional) copy running-config startup-config
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 primary
Step 3 Enter one of the following commands:
Option
exit
Cisco Nexus 7000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.x
156
Description
Configures a device as the root bridge as follows:
• For instance-id, 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.
Description
Commits all the changes and exits MST configuration submode.
Configuring MST Using Cisco NX-OS
Purpose
Enters global configuration
mode.