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'Global' Qos Policy for VRFlite 100M FE WAN interface

We use VRFlite to extend a few VPNs from the PE to CE router. The multiple VPNs have to exist for traffic separation and control options to various campus sites.

The PE-CE link is a 100M FE link on which we have a total of 20M bandwidth.

We have subinterfaces per VRF.

Now we wish to set up 'global' shaping and CBWFQ/WRED policies for the whole 100M WAN interface covering all subinterfaces because

a) we want each VPN to be able to use the whole 20M 'pool' rather than have to shape per VRF subinterface

b) under congention, we want to share out the shaped bandwidth to each VPN according to importance with WRED to control the congestion.

Can anyone confirm if it is ok to apply a policy to the physical on which sit multiple VRFs or are we going to have to pretend that each subinterface is like a FR or ATM PVC and shape/cbwfq/wred on each one ?

Rgds

1 REPLY

Re: 'Global' Qos Policy for VRFlite 100M FE WAN interface

Hi,

from a QoS perspective this has nothing to do with VRFs. QoS is data plane (namely dot1Q on a FE) whereas VRFs are a control plane feature.

So you could f.e. set 802.1p COS bits and use them in a policy on the physical interface. In your case a nested policy would be used with parent policy shaping to 20M and child policy treating traffic according to COS bits.

This was just a high level sketch, in case you need additional assistance, let me know.

Hope this helps

Martin

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