From: Daniel Ramirez (daniel.ramirezdelamo@gmail.com)
Date: Mon Nov 13 2006 - 11:45:15 ART
Hi Dave,
By default "mls qos" and "flowcontrol" are disabled. (Cat: 3550 - IOS:
12.2(25)SEB2)
Therefore if you configure qos (manually or via autoqos) you don't
have problem because flowcontrol is disabled by default.
But you should be aware that enabling qos does not disable flowcontrol.
Best Regards,
Daniel Ramirez - CCIE #16583
Senior Network Engineer
Telefonica [ http://www.telefonica.es ]
---------------------------------------------------
Personal Website [ http://www.danielramirez.es ]
---------------------------------------------------
On 11/13/06, Dave Mumford <Dave.Mumford@telindus.co.uk> wrote:
> Thanks for the reply Vince, I have never actually maually disabled
> flowcontrol when running QOS (manual QOS or AutoQos) on my switches and
> have never had an issue . I wonder if flowcontrol gets disabled by
> default when you config mls qos ? Sorry but I haven't got a switch to
> test this out on.
>
> Thanks, Dave.
>
> ________________________________
>
> From: Vincent Mashburn [mailto:vmashburn@fedex.com]
> Sent: Fri 10/11/2006 14:04
> To: Dave Mumford; ccielab@groupstudy.com
> Subject: RE: QOS / AutoQos on 2950/3550
>
>
> for the reply vonc
>
> You have to enter "mls qos" for the qos to work at layer 2. If you
> don't enter the command, the switch will still take the qos commands
> that you type at the CLI, but they won't do anything. Therefore,
> flowcontrol must be disabled when actively using qos on the switch.
>
> Vince Mashburn
> Sr. Voice / Data Engineer
> 901-263-5072
> CCVP, CCNP, CCDA, Network +
> Cisco IP Telephony Support Specialist
> Cisco IP Telephony Operations Specialist
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Dave Mumford
> Sent: Thursday, November 09, 2006 5:23 AM
> To: ccielab@groupstudy.com
> Subject: QOS / AutoQos on 2950/3550
>
> Can anyone tell me if you definitely need to disable flowcontrol send ,
> flowcontrol receive at interface level when you enable auto qos on 2950
> / 3550
> switches. Config guidelines on CCO mention this when running mls qos ,
> but no
> mention if you run auto qos in the config guidelines.
>
> http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12225see/scg/s
> wqos.
> htm#wp1185065
>
> I've never disabled the flow control in the past and haven't had any
> problems
> either.
>
> I don't believe the command actually does anything in this instance
>
> Any other views ?.
>
> Dave.
>
> Dave Mumford
> Technical Support Consultant, Telindus Limited
> Hatchwood Place, Farnham Road, Odiham, Hampshire, RG29 1AB
> Mailto:Dave.Mumford@telindus.co.uk
> T +44 7785 371920
> M +44 7785 371920
>
> Telindus. Change things your way.
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