From: ashwin kohli (ashwin_kohli1@yahoo.com)
Date: Sat Aug 13 2005 - 11:23:48 GMT-3
J,
EXAMPLE 1
---------
mls qos cos override - By default, CoS override is
disabled. This command overrides all incoming packet's
CoS value to the default which is 0.
Even if a port was previously set to trust CoS (using
the mls qos trust cos command), the mls qos cos
override command superceeds any previously configured
trust state, and all the incoming CoS values are
assigned the default CoS value of 0.
So, I am not too sure why you would type both the
commands on the same port at the same time.
EXAMPLE 2
---------
switchport priority extend cos 1 - You can connect a
PC or other data device to a Cisco 7960 IP Phone port.
The PC can generate packets with an assigned CoS
value. You can configure the switch to override the
priority of frames arriving on the IP phone port from
connected devices.
I hope the above helped. Let me know if you have any
further questions.
Thanks
Ashwin Kohli
CCIE#8877 (R&S, Security)
http://www.ccbootcamp.com/nliipv6labguide.asp
http://www.ccbootcamp.com/nlicciecore.asp
--- buesink@fma.nl wrote:
> Hi guys,
>
>
> Question1:
>
> example 1
> ==========
> mls qos
> int f0/1
> mls qos cos override
> mls qos trust cos
>
> example 2
> ==========
> mls qos
> int f0/1
> switchport priority extend cos 1
>
> what is the difference, could somebody explain me
> briefly When you use the switchport command and when
> you use the mls qos cos command? Whats the
> difference?
>
>
> Question2:
> When I enable "mls qos" on a switch it says:
>
> Switch(config)#mls qos
> QoS: ensure flow-control on all interfaces are OFF
> for proper operation.
>
> Does this mean I have to dlso on example 1 or
> example2 the command "no flow-control receive"
>
> Regards and thanks in advance
>
> J.
>
>
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