Re: Policy-map on (sub)interface?

Hi Miroslav,

You can apply policy-map on either main interface or sub-interface. If you
apply policy-map on sub-interface, it requires H-QoS; that's because there
is no physical tx-ring associate with sub-interface. You need to configure a
parent level service-policy with shaping to simulate the back pressure
generate by tx-ring.

When you apply service-policy on sub-interface, only traffic through this
sub-interface is subject to the policy; while on main interface, all traffic
are subject to the policy.

HTH,

Lei Tian

On Wed, Feb 10, 2010 at 7:09 AM, Miroslav Kosut <miroslav.kosut_at_me.com>wrote:

> Hello there,
>
> I have a simple question. Having a router with two subinterfaces fa0/0.2
> and fa0/0.30 with no ip address configured on the main interface, where
> should be the policy-map applied?
>
> I am almost sure it must be on subinterfaces (to differentiate policies).
> BUT should I leave it on the main one?
>
> Aren't packets going through the policy twice then?
>
> S pozdravom / Regards,
> Miroslav Kosut
>
>
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Received on Wed Feb 10 2010 - 11:52:55 ART