Mapping And Unmapping Vlans To An Mst Instance - Cisco WS-C6506 Software Manual

Configuring Multiple Spanning Tree on the Switch
Hello:
Inst State
---- ------------- ---- --------- ---- -----------------------------------
200 forwarding
Console> (enable)

Mapping and Unmapping VLANs to an MST Instance

By default, all VLANs are mapped to IST (instance 0). For an MST instance (MSTI) 1–15 to be active,
you must map at least one VLAN to that MSTI. IST will always be active whether VLANs are mapped
to IST or not. MST has separate regions, which prevents VLAN mapping conflicts. Follow these
guidelines for mapping and unmapping VLANs to an MST instance:
See
Note
•
•
•
•
•
Note To use VLANs 1025–4094, you must enable MAC address reduction. See the
VLANs" section on page 11-7
VLANs.
To map a VLAN to an MST instance, perform this task in privileged mode:
Task
Step 1
Map a VLAN to an MST instance.
Step 2
Make the new region mapping effective.
Step 3
Verify that the VLAN is mapped.
This example shows how to map a VLAN to MST instance 1 and verify the mapping:
Console> (enable) show spantree mst config
Current (NVRAM) MST Region Configuration:
Configuration Name:arthur
Instance VLANs
-------- --------------------------------------------------------------
=======================================================================
Console> (enable) set spantree mst 1400 vlan 900-999
Edit Buffer modified.
Use 'set spantree mst config commit' to apply the changes
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
7-58
4, (Local port hello:4)
Role Cost
0 forwarding DESG
2 forwarding DESG
DESG
Chapter 11, "Configuring VLANs"
You can map only Ethernet VLANs to MST instances.
At least one VLAN in the instance must have an active port in order for MST to be active.
You can map as many Ethernet VLANs as you wish to an MST instance.
You cannot map a VLAN to more than one MST instance.
The Hello Time, Maximum Age timer, and Forward Delay timer set for mode and all spanning trees
are used globally by MST.
0 1,31-4094
2 2-20
3 21-30
Prio VLANs
200000 32 None
200000 16 1
200000 48 2
for details on using and configuring VLANs.
in Chapter 11, "Configuring VLANs"
Command
set spantree mst instance vlan vlan
set spantree mst config commit
show spantree mst [instance] [active] mod/port
Chapter 7 Configuring Spanning Tree
"Creating Extended-Range
for details on using extended-range
3 instances
Revision:23703
OL-8978-04