QoS on Ethernet vrf subinterface

[StevieOliver_2]

Hi

Previously when I have applied QoS to multiple sub-interfaces on a CE I have divided the total bandwidth into allocations per vrf/subinterface.  Then I applied a hierarchical QoS policy to shape on each sub-interface then do bandwidth allocations per class referencing the sub-interface shape value.

This obviously means the sub-interface is limited to it's shape value and no more.

Is it possible to apply the shape value to the main interface then sub policies per sub-interface ?  The hope being that each sub-interface could use the others unused bandwidth but still, during times of congestion, have a configured bandwidth guarantee.

Many thanks, Stephen.

[Mohamed Sobair · Accepted solution]

Hi Stephen,

Unfortunately, this is not possible. you need a herarchical QoS policy for CBWFQ in order to be applied to the Subinterace.

Another point, your IP addressing is not configured on the main interface , so there is no L3 forwarding on the main interface.

Regards,

Mohamed

[StevieOliver_2]

Many thanks Mohamed.

I suspected this but thought I'd ask the question anyway as my customer seemed to think there may be some recent IOS change that allowed this.

I may in fact have an IP on the main interface as we often configure one VPN on the global table but I don't think that makes any difference in this case anyway.

Regards, Stephen.