cbwfq classes with traffic matching multiple classes

[peterbe]

Hi

Using CBWFQ with access-lists to match traffic assigned to classes. If access-lists are not very specific, what happens to traffic that is matched by 2 or more access-lists i.e. traffic could be put multiple classes?

What is the process for the router uses to determine which class to assign that traffic too?

thanks

Peter

[Giuseppe Larosa · Accepted solution]

Hello Peter,

the order of referring of the class-maps in the policy-amp config counts and so traffic will match on only one class the first one in the order for which the traffic flow matches a criteria like an ACL.

you can see the order in the output of

sh policy-map

This is not good practice and should be avoided if possible by defining ACLs with no possible matches in common for a clean configuration.

Hope to help

Giuseppe

[peterbe]

Thanks Giuseppe