From: Adel Abushaev (adel@netmasterclass.net)
Date: Sun Dec 07 2003 - 20:49:36 GMT-3
Your assumptions are correct. As of the last configuration, it's unnecessary
to trust cos if you have configured to override it.
HTH,
Adel Abouchaev
CCIE# 12037, MCSE
http://www.netmasterclass.net
----- Original Message -----
From: <Ken.Farrington@barclayscapital.com>
To: <matijevi@bellsouth.net>; <ccielab@groupstudy.com>
Sent: Sunday, December 07, 2003 6:15 PM
Subject: RE: Voice Help - CoS Setting - PLEASE :(
> Hey guys, very sorry about this, but, I still canni get the grasp of the
> two examples in the 3550 config guide.
>
> Can I just confirm that example one, leaves the trusted CoS values (say
from
> an IP phone) in tact, and any untagged (ie DATA) frames are set to a C0S
of
> 4.
>
> In the second, all packets regales if trusted are overwritten with the
> default cos vlaue.
>
> can someone help me with this?
>
> sorry :)
>
> -----Original Message-----
> From: Ken.Farrington@barclayscapital.com
> [mailto:Ken.Farrington@barclayscapital.com]
> Sent: 27 October 2003 15:53
> To: matijevi@bellsouth.net; ccielab@groupstudy.com
> Subject: RE: Voice Help - CoS Setting - PLEASE :(
>
>
> Many Thx indeed for the fast response,
>
> I have another example fro the 3550 guide which I am just hoping to
clarify
>
> This example shows how to configure the default port CoS to 4:
>
> Switch(config)# interface gigabitethernet0/1
> Switch(config-if)# mls qos trust cos
> Switch(config-if)# mls qos cos 4
>
>
> This example shows how to assign all the packets entering a port to the
> default port CoS value of 4:
>
> Switch(config)# interface gigabitethernet0/1
> Switch(config-if)# mls qos cos 4
> Switch(config-if)# mls qos cos override
>
>
> Can I just confirm that example one, leaves the trusted CoS values (say
from
> an IP phone) in tact, and any untagged (ie DATA) frames are set to a C0S
of
> 4.
>
> In the second, all packets regales if trusted are overwritten with the
> default cos vlaue.
>
> Thing is, I have configure a port as such,
> !
> interface FastEthernet0/2
> switchport access vlan 100
> no ip address
> mls qos cos 5
> mls qos cos override
> mls qos trust cos
> !
>
> Does this config, mean that all trusted cos values get overridden by the
> override command - even with the trust command in the config?
>
> Many thx to all,
> Ken
>
>
>
> -----Original Message-----
> From: matijevi@bellsouth.net [mailto:matijevi@bellsouth.net]
> Sent: 27 October 2003 15:37
> To: Ken.Farrington@barclayscapital.com; ccielab@groupstudy.com
> Subject: Re: Voice Help - CoS Setting - PLEASE :(
>
>
> Ken,
> I believe your first answer is correct based on the 3550 admin guide:
> switchport priority extend
> cos value
> Set the IP phone access port to override the priority received from
the
> PC or the attached device.
>
> The CoS value is a number from 0 to 7. Seven is the highest
priority.
> The default is 0.
>
>
>
> Sincerely,
> Matijevic
> ----- Original Message -----
> From: <Ken.Farrington@barclayscapital.com>
> To: <ccielab@groupstudy.com>
> Sent: Monday, October 27, 2003 10:11 AM
> Subject: Voice Help - CoS Setting - PLEASE :(
>
>
> > Hi Guys,
> >
> > I have a question re the tagging of CoS values.
> >
> > If I have an IP phone, with a PC connected and I get a question "Overide
> to
> > CoS priority on all Data Frames"
> >
> > Can I do this two ways.
> >
> > int fa 0/2
> > switchport priority extend cos <value>
> >
> > int fa 0/2
> > mls qos cos <value>
> >
> > I undertsand the first to have the IP phone set the CoS and the second,
> the
> > switchport sets the CoS value for all data "UNTAGGED" frames.
> >
> > Which one should I use, or am I even half correct?
> >
> > Many thx,
> > Ken
> >
> >
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