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

uplink

hello!

its unpossible to run spanning-tree uplink fast on the Ds-Switches,right?

10xs

3 REPLIES

Re: uplink

Spanning uplink fast is run on switches which are dually connected to 2 distribution or core switches of which one is a root. It helps in reducing the delay in converging the STP topology when the root port has failed. This reduces the convergence time for 40 sec to just 1 sec.

Refer this link:

http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a0080094641.shtml#backinfo

Ifyou are asking about running the feature on trunks between 2 DS siwtches which are root & backup root, then you need the backbonefast feature.

Refer this link:

http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800c2548.shtml

hope that clarifies.

pls rate all helpful posts.

Re: uplink

Ali,

Uplinkfast can be enabled even in Distribution switches but mostly the implementation is done in such a way that the DS's are the roots of soanning tree and hence have all ports in designated state.

Uplinkfast helps only those switches when they have a blocked port and there is a failure on the root port which is mostly on the access switch connecting to the core/Distribution

HTH

Narayan

New Member

Re: uplink

10xs Freinds

160
Views
10
Helpful
3
Replies
CreatePlease login to create content