Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Spanning tree for VLANS

Hi,

I need an answer to this puzzling scenerio i have been asked to work with.I have two vlans with about 10 switches on each end and there is a link switch that has a connection to both sides of the VLAN. I have been asked to create a singular spanning tree for the entire scenerio. how can i go about this.

please i am awaiting the opinions of anyone knowledgable in this line. thanks.

2 REPLIES
Hall of Fame Super Bronze

Re: Spanning tree for VLANS

What they are trying to tell you is NOT to use PVST, which leaves you with MST.

Check this article http://www.cisco.com/warp/public/473/147.html

HTH,

New Member

Re: Spanning tree for VLANS

Hi, I agree you can config MST on your router to reduce the number of spanning tree instances runing on the switch from one per vlan. You will have to map your vlan range to the MST, useful CLI commands are

spanning-tree mode mst

spanning-tree mst configuration

name (name)

revision( revision number)

instance (number) vlan (vlan range)

check your config using

show spanning-tree mst configuration.

Hope thsi will hlep you get started.

DW

194
Views
5
Helpful
2
Replies