From: Bob Sinclair (bsin@cox.net)
Date: Wed Jun 02 2004 - 12:41:42 GMT-3
Gary,
I don't know why it is ( beyond "that is how the guys wrote it"). But it
does seem that the class-default is inactive unless there exists another
class in the map. Cannot find any documentation on it. I tested this on Cat
3550 using 12.1(19). In order for class-default to mark precedence, needed
to have another class, even if nothing matched the other class.
HTH,
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: "Lileikis, Gary" <gary.lileikis@unisys.com>
To: <ccielab@groupstudy.com>
Sent: Wednesday, June 02, 2004 9:55 AM
Subject: RE: A Question about 3550 QoS
> Why is it that the policy-map at the beginning of this thread did not
> work?
>
> Thanks!!
> Gary
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Chris Larson
> Sent: Wednesday, June 02, 2004 9:20 AM
> To: Peng Zheng; Brent.Bowers@cox.com; tomasz.szymanski@trecom.pl
> Cc: ccielab@groupstudy.com
> Subject: Re: A Question about 3550 QoS
>
> I have not tested it out but I think that the 3550 has a default layer 2
> CoS
> to layer 3 DSCP mapping. Therefore if you configure QoS and an ethernet
> frame is CoS marked then the default is to map the CoS into the
> appropriate
> DSCP and you would see the ToS value changed in the packet.
>
>
> ----- Original Message -----
> From: "Peng Zheng" <zpnist@yahoo.com>
> To: <Brent.Bowers@cox.com>; <tomasz.szymanski@trecom.pl>
> Cc: <ccielab@groupstudy.com>
> Sent: Wednesday, June 02, 2004 1:56 AM
> Subject: RE: A Question about 3550 QoS
>
>
> > Can anyone verify this because I don't have access to
> > a 3550?
> >
> > --- Brent.Bowers@cox.com wrote:
> > > In my testing on a 3550 it does actually change the
> > > TOS bits. If you have access to a 3550 please test
> > > it out and check it against a packet analyzer to
> > > verify the change.
> > >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com
> > > [mailto:nobody@groupstudy.com]On Behalf Of Peng
> > > Zheng
> > > Sent: Tuesday, June 01, 2004 3:01 PM
> > > To: Bowers, Brent (CCI-San Diego);
> > > tomasz.szymanski@trecom.pl
> > > Cc: ccielab@groupstudy.com
> > > Subject: RE: A Question about 3550 QoS
> > >
> > > I think this will set cos, not ip precedence. Am I
> > > wrong?
> > >
> > > --- Brent.Bowers@cox.com wrote:
> > > > mls qos cos 5
> > > > mls qos cos override
> > > >
> > > > Should do the trick...
> > > >
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: nobody@groupstudy.com
> > > > [mailto:nobody@groupstudy.com]On Behalf Of Tomasz
> > > > Szymanski
> > > > Sent: Tuesday, June 01, 2004 1:49 PM
> > > > To: Peng Zheng
> > > > Cc: ccielab@groupstudy.com
> > > > Subject: Re: A Question about 3550 QoS
> > > >
> > > > I tried some examples today and watched the
> > > packets
> > > > with Ethereal.
> > > >
> > > > class class-default will not match ip traffic (I
> > > > don't know why but it
> > > > didn't work)
> > > >
> > > >
> > > > Peng Zheng wrote:
> > > >
> > > > >Requirement: on port fa 0/6, it is in Vlan 10,
> > > set
> > > > ip
> > > > >preference of all traffic from that port to
> > > > critical.
> > > > >
> > > > >Can I use this?
> > > > >
> > > > >policy-map TEST
> > > > >class class-default
> > > > >set ip preference critical
> > > > >
> > > > >int fa 0/6
> > > > >switch access vlan 10
> > > > >switch mode access
> > > > >service-policy input TEST
> > > > >
> > > > >Thanks for any reply.
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >__________________________________
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