Re: mls Qos

Perfectly said.

On Sun, Jul 26, 2009 at 9:08 PM, Dale Shaw <dale.shaw_at_gmail.com> wrote:

> Rightly or wrongly, I know lots of production networks where turning
> this on would break stuff severely.
>
> Consider this common scenario:
>
> - IPTel/VoIP is deployed in a distributed network
> - QoS is enabled only on the WAN routers (not in the LANs), where
> interface congestion is a real problem
> - WAN routers 'trust' packets marked by IP phone endpoints -- i.e.
> marking is done by the phone
>
> Yes, QoS should be enabled end-to-end, but it's often not. Switching
> on 'mls qos' on the LAN switches without also applying the appropriate
> trust configuration would wreak havoc. Suddently, voice traffic would
> be fighting it out with YouTube.
>
> So, *cue twilight zone theme music and raise left eyebrow David
> Copperfield style*, I agree with Darby.
>
> cheers,
> Dale
>
> On Mon, Jul 27, 2009 at 10:57 AM, Evan Weston<evan_weston_at_hotmail.com>
> wrote:
> > How is it negligent? In a prod network I would have thought it better to
> not
> > trust anything by default at the edge. Just a thought.
> >
> >
> > -----Original Message-----
> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> > Darby Weaver
> > Sent: Monday, 27 July 2009 10:47 AM
> > To: Keegan.Holley_at_sungard.com
> > Cc: CCIE Groupstudy; kaniyath minha
> > Subject: Re: mls Qos
> >
> > True enough.
> >
> > However to simply turn mls qos on by itself without being aware of what
> it
> > does and what it does not do is probably negligent at best.

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Received on Sun Jul 26 2009 - 21:09:12 ART