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Community Member

MPLS Traffic Engineering Load-sharing with thresholds?

Is there a way to configure MPLS TE to transfer traffic from one TE tunnel over to a 2nd or 3rd TE tunnel, after a certain threshold has been reached?

For example, if TE tunnel #1 reaches a 75% of its capacity, can any additional traffic be shifted over to an alternate TE route?

3 REPLIES
Cisco Employee

Re: MPLS Traffic Engineering Load-sharing with thresholds?

Shawn,

This is not possible. Can you let us know what you are trying to achieve. Maybe auto bandwidth could help.

http://www.cisco.com/en/US/docs/ios/12_2t/12_2t4/feature/guide/ftbwadjm.html

Regards

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
Community Member

Re: MPLS Traffic Engineering Load-sharing with thresholds?

Given that the load sharing is per destination, I was curious if there was a way to offload traffic onto other, less utilized links without changing the cef/load balancing configuration. We have a lot of single-server to single-server backups that take place, and those backups tend to follow a single path. My thinking is that there would be a way to 'share' that load with other links.

I've read up on auto-bw but haven't given it much of a go just yet, though I think it might help.

Cisco Employee

Re: MPLS Traffic Engineering Load-sharing with thresholds?

Shawn,

if you are able to mark separate IP precedence bits on these different transfers, you could use Class Based Tunnel Selection (CBTS), which will select the egress tunnel based on the precedence bits, given that you have multiple tunnels to the given destination.

http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/gscbts.html

Regards

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
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