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Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
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Chapter 8 Configuring Spanning Tree
Using MISTP-PVST+ or MISTP
To configure the port instance priority on an MISTP instance, perform this task in privileged mode:
This example shows how to configure the port instance priority on an MISTP instance and verify the
configuration:
Console> (enable)
set spantree portinstancepri 2/12 10 2
Port 2/12 instances 2 using portpri 10.
Port 2/12 mistp-instance 1,3-16 using portpri 40.
Console> (enable)
Enabling an MISTP Instance
You can enable up to 16 MISTP instances. Each MISTP instance defines a unique spanning tree
topology. MISTP instance 1, the default instance, is enabled by default; however, you must map a VLAN
to it in order for it to be active. You can enable a single MISTP instance, a range of instances, or all
instances at once using the
all
keyword.
Note
The software does not display the status of an MISTP instance until it has a VLAN with an active
port mapped to it.
To enable an MISTP instance, perform this task in privileged mode.
Note
Enter the
active
keyword to display active ports only.
This example shows how to enable an MISTP instance:
Console> (enable)
set spantree enable mistp-instance 2
Spantree 2 enabled.
Console> (enable)
show spantree mistp-instance 2
Instance 2
Spanning tree mode MISTP
Spanning tree type ieee
Spanning tree instance enabled
.
.
.
Task
Command
Configure the port instance priority on an MISTP
instance.
set spantree portinstancepri
{
mod/port
}
priority
[
instances
]
Task
Command
Step 1
Enable an MISTP instance.
set spantree enable mistp-instance
instance
[
all
]
Step 2
Verify the instance is enabled.
show spantree mistp-instance
[
instance
] [
active
]
mod/port
