Configuring An Mst Secondary Root Bridge - Cisco Nexus 9000 Series Configuration Manual
Nx-os layer 2 switching configuration
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- Configuration manual (562 pages) ,
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Configuring an MST Secondary Root Bridge
Configuring an MST Secondary Root Bridge
You use this command on more than one device 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 global configuration command.
Procedure
Step 1
Step 2
Step 3
Step 4
Cisco Nexus 9000 Series NX-OS Layer 2 Switching Configuration Guide, Release 7.x
136
Command or Action
config t
Example:
switch# config t
switch(config)#
spanning-tree mst instance-id root
{primary | secondary} [diameter
dia[hello-time hello-time]] or no
spanning-tree mst instance-id root
Example:
switch(config)# spanning-tree mst
5 root secondary
exit
Example:
switch# exit
switch(config)#
show spanning-tree mst
Example:
switch# show spanning-tree mst
Configuring MST Using Cisco NX-OS
Purpose
Enters configuration mode.
• spanning-tree mst instance-id root {primary |
secondary} [diameter dia[hello-time hello-time]]
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.
• no spanning-tree mst instance-id root
Returns the switch priority, diameter, and hello-time
to default values.
Exits configuration mode.
(Optional)
Displays the MST configuration.
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