Re: Question for Brian Dennis on QoS, which priority queue

From: Tarun Pahuja (pahujat@gmail.com)
Date: Mon Nov 05 2007 - 20:11:07 ART

Alex,
         The Egress queuing on a 3560 can be a slightly tricky topic,
specially when you are comparing it with 3550 QOS model. Please have a look
at the following link, it will explain the logic behind the reversal of
priority queue scheme in a 3560 as compaired to a 3550 Model.

http://books.google.com/books?id=WOPoD6cGXEsC&pg=PA351&lpg=PA351&dq=priority+queue+3560&source=web&ots=yVh_W2b3d9&sig=QiN_jgXj0pVXEzsLq1Mb8DB_BPQ#PPA351,M1

Thanks,
Tarun

On 11/6/07, Tarun Pahuja <pahujat@gmail.com> wrote:
>
> Alex,
> I am presuming that you are talking about ingress priority queue.
> You can do expedite queuing in egress direction as well.
>
> http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_25_se/configuration/guide/swqos.html#wp1162001
>
>
> HTH,
> Tarun
>
>
> On 11/5/07, Alex Steer <alex.steer@eison.co.uk> wrote:
> >
> > I've just watched Brians class on CAT QoS (sounds abit like catOS)
> >
> > It was quite good apart from the lack of warning about operating heavy
> > machinery while watching this video, or anything where someone could get
> > hurt
> > if you fell asleep (i think that more the subject matter not Brian
> > himself)
> >
> > There was one thing though. Towards the end he talks about configuring
> > the
> > priority queue on the cat 3560. He talks about putting high priority
> > traffic
> > into queue4. Please correct me if im wrong but isn't the priority queue
> > on
> > the 3560 actually queue 1 not queue 4. I'm pretty sure it's queue 1 not
> > 4 as
> > the video suggests.
> >
> > Just in case it wasn't confusing. "I've got a good idea, the 3550 was
> > really
> > but when we bring out a new switch lets swap the priority queue from 4
> > to 1,
> > that will really trick them"
> >
> > I never like being 100% sure so someone jump in and let me know for
> > sure.
> >
> > thanks
> >
> > Alex
> >
> > ______________________________________________________________________
> > This email has been scanned by the MessageLabs Email Security System.
> > For more information please visit http://www.messagelabs.com/email
> > ______________________________________________________________________
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html

This archive was generated by hypermail 2.1.4 : Sat Dec 01 2007 - 06:37:28 ART