How to classify traffic in CBWFQ?

[souagarw]

Hi,

Is it possible to classify traffic based on specific attributes of routes learned by BGP through CBWFQ?

I think answer is No as there is no option available under class-map to match traffic based on BGP attributes.

Also, we can match prefix with BGP attributes using route-map, however route-map can't be called under class-map.

Please let me know if I'm missing anything here or if there is a way to achieve this.

Regards

Sourabh

[Giuseppe Larosa]

Hello Sourabh,

we have already talked about this.

Just another thought:

if you could do PBR with a route-map based on route tags and as action setting a qos-group you could on the outgoing interface use traffic classes that use qos-groups to define traffic.

However, I don't think that a route-map used for PBR allows to match on the route-tag.

This is something that should be tested

Hope to help

Giuseppe

[souagarw]

Hi Giuseppe,

How about using 'QoS Policy Propagation via Border Gateway Protocol' to classify packets by IP precedence based on BGP community lists, BGP autonomous system paths, and access lists?

http://www.cisco.com/en/US/docs/ios/12_2/qos/configuration/guide/qcfprop_ps1835_TSD_Products_Configuration_Guide_Chapter.html#wp1002592

Regards

Sourabh

[Giuseppe Larosa]

Hello Sourabh,

I did some tests on this many years ago.

It worked if I remember correctly.

If applicable to your scenario it can be used.

It allows to mark traffic based on BGP communities.

Hope to help

Giuseppe