From: Ken.Farrington@barclayscapital.com
Date: Sun Dec 07 2003 - 20:15:50 GMT-3
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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