Re: mlq qos vlan-based Q?

Ivan,

It sounds like you pretty much understand it. The only ports that are
effected by the policy are the ones that have the mls qos vlan-based
command.

On Tue, Feb 2, 2010 at 11:05 AM, Ivan Hrvatska <ivanzghr_at_gmail.com> wrote:

> Hello,
>
> one question about mls qos on 3560, just to make sure that I've understood.
> Diagram:
>
>
> R1-----------------------SW1-----------trunk-----------------SW2---------------R2
>
> R3-----------------------SW1-----------trunk-----------------SW2---------------R4
>
> R1 and R2 are in VLAN 12, R3 and R4 are in VLAN 34. SW1 is routing
> between VLANs via SVI interfaces configured for each VLAN.
> Traffic in VLAN 12 should be mapped with ip prec 3, and traffic from
> VLAN 34 with ip prec 4.
> On SW1 I configured policy-map under interface vlan 12 (inbound) which
> should mark packets according to task. Same thing for interface vlan
> 34. On the same switch I put mls qos vlan-based on trunk ports.
> When I ping from R1 to R2 packets are NOT marked. When I ping from R2
> to R1, packets are marked correctly.
> Is the reason for that mls qos vlan-based command under trunk
> interface? I mean, does it work only when traffic is going INBOUND
> into physical interface? Actual marking is done on physical int or on
> SVI int? Obviously interVLAN traffic is coming IN SVI interface on
> SW1, but traffic still isn't marked with correct ip prec value.
> Thanks.
>
>
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-- 
Bryan Bartik
CCIE #23707 (R&S, SP), CCNP
Sr. Support Engineer - IPexpert, Inc.
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