From: Wes Stevens (wrsteve33-gsccie@yahoo.com)
Date: Sat Nov 24 2007 - 14:59:32 ART
You can mark on imput on an ios based 4500. The idea is to mark on imput for ports that are connected to devices and then to queue on output. The output queueing is done in hardware and is dscp mapped in the 4500. The one thing to watch on the 4500's is DBL. It will at time think your voice or telepresence traffic is a 'missbehaved' flow and start dropping it's packets. You need to apply DBL in your policy map to only non EF traffic. That is what your are seeing autoqos do with the 'dbl' under only the class-default. The output policy is only turning off DBL for voice. The queueing is done in the hardware queues not software on the 4500.
----- Original Message ----
From: shiran guez <shiranp3@gmail.com>
To: thomas.rader@freesurf.ch
Cc: ccielab@groupstudy.com
Sent: Saturday, November 24, 2007 2:24:58 AM
Subject: Re: 4500 QoS DBL and marking
you cant mark on input!
I think only 65xx series support input marking of packets.
On Nov 24, 2007 10:14 AM, <thomas.rader@freesurf.ch> wrote:
> Hi,
>
> When you use AutoQos on the 4500 it configures DBL with an "service-policy
> output" command on the interface level.
>
> policy-map autoqos-voip-policy
> class class-default
> dbl
>
> interface GigabitEthernet3/1
> service-policy output autoqos-voip-policy
> qos trust cos
> auto qos voip trust
> tx-queue 3
> bandwidth percent 33
> priority high
> shape percent 33
>
> The issue I have is that I want to use an ACL to Mark voice traffic with
> EF which uses a "service-policy input".
>
> As far as I am aware, you can't have an output and an input service-policy
> on the same interface.
>
> policy-map QoS
> class class-voice
> set dscp ef
> class class-default
> set dscp default
>
> class-map match-any class-voice
> match access-group 100
>
> access-list 100 permit ip 10.10.10.0 0.0.0.255 any
>
> interface FastEthernet0/1
> service-policy input QoS
>
>
> Can anyone offer any help ?
>
> Thanks, Thomas
>
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-- Shiran Guez MCSE CCNP NCE1 http://cciep3.blogspot.com http://www.linkedin.com/in/cciep3
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