From: John Edom (jedom123@gmail.com)
Date: Fri Jan 02 2009 - 13:09:40 ARST
Hi Howard,
thank you for explanation. can you manipulate the second example to get the
same result that is of first example?
Regards
On Fri, Jan 2, 2009 at 6:56 PM, Howard Hooper
<Howard.Hooper@dupre.co.uk>wrote:
> Hi John,
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4
: Sun Mar 01 2009 - 09:43:36 ARST
>
> In the configuration examples below, the first example would tell the
> attached phone to set the cos value in all frames received from it's
> attached PC to 1, the switch would also trust the incoming cos values
> from both the phone and pc, so you will see different values being
> trusted for frames like voice (cos 5) etc coming from the phone and all
> frames from the pc marked with cos 1.
> In the second example although the 'mls qos trust device Cisco-phone'
> command has been entered the command 'mls qos cos override' will tell
> the switch to replace the cos value on all incoming frames from the pc
> and phone with the value specified with the 'mls qos cos x' command, in
> this case 1.
>
> HTH
>
> Howard
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> John Edom
> Sent: 02 January 2009 14:22
> To: Marko Milivojevic
> Cc: Bob Sinclair; Raheel Itrat; GS CCIE-Lab
> Subject: Re: mls qos default cos value
>
> Hi,
>
> Here i would add a question if i have a phone connect with switch port
> and
> then a pc is connected with that phone. we do config like
>
> interface FastEthernet 1/18
> switchport access vlan 3
> switchport voice vlan 5
> switchport priority extend cos 1
> mls qos trust cos
>
> but if i configure
>
> inter fa 1/18
> switchport access vlan 3
> switchport voice vlan 5
> mls qos cos 1
> mls qos cos override
> mls qos trust device cisco-phone
>
> are both configuration same?? purpose is when frames come from phone,
> these
> should be trust and if fames come from pc, these should set to cos 1
>
> Regards
>
>
> On Fri, Jan 2, 2009 at 5:48 PM, Marko Milivojevic
> <markom@markom.info>wrote:
>
> > Also, note that depending on the switch model, actual COS value may be
> > passed on through the switch, but the switch will not act on it.
> >
> > On Thu, Jan 1, 2009 at 14:05, Bob Sinclair <bob@bobsinclair.net>
> wrote:
> > > Hello Raheel,
> > >
> > > You have two options for associating frames with the default cos.
> > > If you use "trust cos", then only untagged traffic will be marked to
> the
> > > default cos. If you use "override" then both tagged and untagged
> traffic
> > > will be set to the default cos.
> > >
> > > Either can be used on trunk or access. The main difference being
> that on
> > > access links all frames are untagged. On trunks frames on the
> native
> > vlan
> > > will be untagged.
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> >
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