[c-nsp] catalyst 6500 not rewriting CoS / 802.1p bits

[Fredrik Jacobsson]

Is it a port on the supervisor? What sup version?
There is a known problem with the ports on the sup2.

For some qos operations (I think it include rewrites) the ports on the
sup2 card requires a epld upgrade (to v7). TAC will supply you with it
if you ask for it.

You can probably find more info on some releasenotes or bug toolkit searches.
I dont remember the details, sorry.

/Fredrik




2008/2/9, Vladimir Ivashchenko <hazard at francoudi.com>:
> Hi List,
>
> We cannot get Cat6500 to rewrite CoS values (802.1p bits).
>
> Configuration is
>
> mls qos
> no mls flow ip
> no mls flow ipv6
> no mls qos rewrite ip dscp
> no mls acl tcam share-global
> mls cef error action freeze
>
> interface GigabitEthernet2/1
>  switchport
>  switchport trunk encapsulation dot1q
>  switchport mode trunk
>  no ip address
>  load-interval 30
>  wrr-queue queue-limit 40 30
>  mls qos cos 5
>  no cdp enable
>  spanning-tree portfast trunk
>  no mls qos trust
>
> We have a sniffer connected to dot1q trunk on another port. The sniffer shows that 802.1p value for packets going out
> from Gig2/1 is set to 0. We have tried searching Cisco site and playing with various commands, but did not succeed. IOS
> 12.2(18)SXF5.
>
> Catalyst 3560 has "mls qos cos override" command, which seems to do the trick, but this command is not available on
> Catalyst 6500.
>
> --
> Best Regards
> Vladimir Ivashchenko
> Chief Technology Officer
> PrimeTel, Cyprus - www.prime-tel.com
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