From: Bob Sinclair (bob@bobsinclair.net)
Date: Thu Jan 01 2009 - 12:05:54 ARST
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.
HTH,
Bob Sinclair CCIE 10427 CCSI 30427
www.netmasterclass.net
Raheel Itrat wrote:
> Hi,
>
> In order to change the default cos value on 3550s and 3560s ports, do we
> also have to configure the trust mode ( mls qos trust cos ) first prior to
> the mls qos cos X command. Is it gonna be same for both trunk and access
> ports?
>
> Thanks,
>
>
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