[cisco-voip] Easy QoS question - trust boundary

[Ed Leatherman]

Good idea Rob. I just ran that - odd thing is my packets start out at
tos 184 (EF) and end up 96 CS3.. i think maybe our service provide is
remarking them. Good to know :)

On Thu, Jan 28, 2010 at 3:17 PM, Leetun, Rob <rleetun at bouldercounty.org> wrote:
> Hi Ed,
>
> Here is a test that will let you know if QoS is being passed through.
>
> Capture the traffic of a phone call that goes through that router.
>
> Also check to see if DSCP markings make it through with the following
> command.
>
> ip sla monitor 333
>  type udpEcho dest-ipaddr 192.168.1.1 dest-port 1967 source-ipaddr
> 192.168.253.1  tos 184  frequency 10
>
> ip sla monitor schedule 333 life 30 start-time now
>
> The above command will send a few packets to 1.1 and the DSCP will be
> set to EF.
>
> Watch the packets in Wireshark and examine the DSCP.
>
>
> Rob
>
> Robert Leetun
> Network Engineer
> Boulder County Information Technology
> 2025 14th Street
> Boulder, CO 80302
> 303 441-3866 (W)
> 303 441-3983 (F)
> rleetun at bouldercounty.org
>
>
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Ed Leatherman
> Sent: Thursday, January 28, 2010 12:44 PM
> To: Cisco VOIP
> Subject: [cisco-voip] Easy QoS question - trust boundary
>
> I'm sure this is an elementary question for many.
>
> We're reviewing (and correcting) our qos settings and right now i'm
> looking at trust boundaries. We're doing our packet marking on the
> edges (usually at the IP Phone or access port), so our internal
> connections all trust. My question is when I get to our 7206VXR that
> handles WAN connections, I don't have an "mls qos trust" command
> available on the interfaces. Do these interfaces then implicitly trust
> QoS markings on incoming packets, or do I need to setup some maps to
> mark them again?
> Most of the other devices on our network are catalyst switches so i'm
> unfamiliar with this platform.. reading thru the srnd on qos has some
> configurations with class-maps but I didnt see anywhere where it
> talked about setting up or not setting up trust.
>
> Thanks!
>
> --
> Ed Leatherman
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>



-- 
Ed Leatherman