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

[Vladimir Ivashchenko]

Hi,

Actually I tried that one before and it wouldn't work.

#(config-if)service-policy input set-cos-5
set cos cannot be configured in input direction for this interface

Eventually I got what I wanted by using a policy to set internal DSCP to
EF, as per suggestion of Phil.

On Sun, 2008-02-10 at 07:49 +0100, Arie Vayner (avayner) wrote:
> Vladimir,
> 
> Try applying a different policy on the ingress port. Try using an MQC
> one:
> 
> policy-map set-cos-5
>   class class-default
>    set cos 5
> !
> Interface Gig2/1
>  service-policy input set-cos-5
> 
> Arie
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Vladimir
> Ivashchenko
> Sent: Sunday, February 10, 2008 00:32 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] catalyst 6500 not rewriting CoS / 802.1p bits
> 
> 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
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
-- 
Best Regards,
Vladimir Ivashchenko
Chief Technology Officer
PrimeTel PLC, Cyprus - www.prime-tel.com