I have some traffic with cos=4 coming into fa0/4 and going out on fa0/0. I monitor the fa0/0 and expected to see the cos of the outgoing traffic to change to 6 on fa0/0, but it doesn't. Not matter what I do, the cos keeps the same.
For a) and b), I tried all possible "mls qos" command combinations with both tag and untag traffic, none of them make any difference.
I'm not sure how to enable "mls qos" globally on the 3600 router, because I can not just simply configure "mls qos" then enter, it has to be followed by the "map" option, so I don't think the "mls qos map" command is for globally enabling qos.
SW1(config)#mls qos ?
map qos map keyword
% Incomplete command.
Here is the output of "show mls qos int fa0/4":
SW1#show mls qos interface fastEthernet 0/4
interface fastEthernet 0/4
trust state: not trusted
trust mode: not trusted
COS override: dis
default COS: 4
The line I don't understand is "pass-through: none". Does it mean the default cos does apply to pass-through traffic? If yes, how can I change it?
I don't have 3600 router in hand to test it. But it did not work when I tested it in Dynamips. I am not sure if the following doc is not correct or I mis-understood it. Maybe we could not overwrite cos in this way.
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