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Per VLAN policing on 3750-X stack

Hi all,

I have a scenario whereby I want to police traffic on a certain VLAN passing through a 3750-X  two-switch-stack, either at layer-2 or layer-3.  The traffic will come into the switch stack via an etherchannel trunk, terminating on both stack members.  Ideally the switches should remain layer-2 but I can use SVIs if need be.

I am aware it is possible to police on an SVI using hierarchical policy-maps and VLAN based QoS, BUT I can't see a way of doing this when I have two switches in a stack, and the traffic I want to police comes into the switch stack via an etherchannel trunk that is terminated on both stack members.

Can anyone help?

Thanks in advance...

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