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Is it caused by change in recommended DSCP values over time. ~4 years
ago we changed recommended values for signaling at least.<br>
<br>
/Wes<br>
<br>
On Sunday, May 10, 2009 2:53:26 AM, Jonathan Charles
<a class="moz-txt-link-rfc2396E" href="mailto:jonvoip@gmail.com"><jonvoip@gmail.com></a> wrote:<br>
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<pre wrap="">Apologies for the lack of clarification...
The switch is a 3750-24PS
The lab is v3.
And yes, I know to trust CoS on trunks and DSCP on access ports to servers...
Jonathan
On Sat, May 9, 2009 at 9:37 PM, Michael Ciarfello
<a class="moz-txt-link-rfc2396E" href="mailto:MCiarfello@iplogic.com"><MCiarfello@iplogic.com></a> wrote:
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<pre wrap="">I'm a little confused what you are asking exactly. And I think you have the mappings backwards from what your premise statement is.
Depending on switch / router model or software the COS to DSCP map may configure 24 or 26. If the requirement is to put signaling traffic in CS3, then use 24. Maybe the requirement would be to put it in AF31 so use 26.
Also study up on trust cos vs trust dscp and where to use each and on what piece of equipment, etc. Some 6500 line cards have all sorts of restrctions. QoS SRND has a great discussion of these.
If you have a home lab a sniffer is a great tool to check out the markings at various places and make sure they are carrying through.
ah crap, power is flickering, gotta go.
________________________________________
From: <a class="moz-txt-link-abbreviated" href="mailto:ccie_voice-bounces@onlinestudylist.com">ccie_voice-bounces@onlinestudylist.com</a> [<a class="moz-txt-link-abbreviated" href="mailto:ccie_voice-bounces@onlinestudylist.com">ccie_voice-bounces@onlinestudylist.com</a>] On Behalf Of Jonathan Charles [<a class="moz-txt-link-abbreviated" href="mailto:jonvoip@gmail.com">jonvoip@gmail.com</a>]
Sent: Saturday, May 09, 2009 5:43 PM
To: <a class="moz-txt-link-abbreviated" href="mailto:cisco-voip@puck.nether.net">cisco-voip@puck.nether.net</a>; <a class="moz-txt-link-abbreviated" href="mailto:ccie_voice@onlinestudylist.com">ccie_voice@onlinestudylist.com</a>
Subject: [OSL | CCIE_Voice] DSCP to COS map question
So, autoQoS adds this:
mls qos map cos-dscp 0 8 16 24 32 46 48 56
Yet we are advised to do this:
mls qos map cos-dscp 0 8 16 26 34 46 48 56
Remapping AF31 to COS 3
Well the default puts CS3 into COS 3, which is what you want to do now...
Am I right?
Jonathan
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