[cisco-voip] Auto-QoS ?

[Linsemier, Matthew]

I haven't read the SRND in a while, but lately in dealing with TAC, they
have always recommended changing the COS 3 COS-to-DSCP mappings to DSCP
26 rather than the default DSCP 24.  I remember doing this in the past.
I thought CS3 was the old method and AF31 was the new one.  Guess it's
time to go check out the SRND.

Matt

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Carter, Bill
Sent: Tuesday, June 05, 2007 4:59 PM
To: Jonathan Charles; Paul Choi
Cc: cbomba at s4nets.com; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Auto-QoS ?

AutoQoS on the switches still maps COS 3 to DSCP AF31(26), when current
SRND and CM installations set call control to DSCP CS3(24).  I run
autoqos on the switches then adjust the map. 

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jonathan
Charles
Sent: Tuesday, June 05, 2007 3:10 PM
To: Paul Choi
Cc: cbomba at s4nets.com; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Auto-QoS ?

I would agree on the Router-side.. but for the switches, it is far more
likely to have positive results than the manual method...
especially without years of experience configuring your queues...

To be honest, the auto-qos dumps config into the switch that is, A:
Cisco TAC supported, B: Likely to work great and C: easy.

Why wouldn't you use it? Unless you have a lot of SNA traffic or
something...


Jonathan


On 6/5/07, Paul Choi <asobihoudai at yahoo.com> wrote:
> Auto-QoS, better known as "QoS for idiots" (like
> myself) is a cookie cutter approach to your network. I think it's 
> better not to use if you have the knowhow to implement QoS yourself.
>
> --- "Christopher M. Bomba" <cbomba at s4nets.com> wrote:
>
> > I have implemented QoS on multiple voice networks from 6500s to 
> > 2950s.  I have done it always manually.  The network I am working on

> > now is insisting on Auto-QoS.  I haven't done it before but only 
> > heard horror stories from it.
> >
> > What are you thoughts on this?  This is a very large network that is

> > going to have multiple clusters and thousands of devices connected 
> > to the IPT network.
> >
> > Thanks,
> >
> > Chris
> >
> > _______________________________________________
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> > https://puck.nether.net/mailman/listinfo/cisco-voip
> >
>
>
>
>
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