[c-nsp] mls qos trust dscp on 7600 port-channel breaks IS-IS?

[Blake Dunlap]

You're leaving out what your service policy looks like, which is where my
hunch says the problem lies.

On Wed, Aug 10, 2011 at 13:28, Jared Gillis <jared.a.gillis at gmail.com>wrote:

> Hi all,
>
> I just ran into an unusual problem when deploying some QoS onto a 7606 in
> my network. I was configuring all ports to trust DSCP input, and after
> applying the command to all the physical ports, I went to apply it to my the
> port-channels. Shortly after I did, IS-IS went down (timeout) on the L3
> links across those port-channels. IS-IS came back when I removed the trust
> DSCP command. I've done some searching around and can't find any reference
> to this feature/bug/wtf anywhere. Does anyone have any knowledge about why
> this would happen?
>
> Here's my PO config:
> interface Port-channel1
>  switchport
>  switchport trunk encapsulation dot1q
>  switchport trunk allowed vlan 200
>  switchport mode trunk
>  mtu 9216
>  load-interval 30
>  service-policy input SONIC-DEFAULT-QOS
>
> And the command I entered was "mls qos trust dscp".
>
> Thanks
>
> -Jared
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