[c-nsp] QoS possible on the 7600 Sup720-3bxl?

[Tim Franklin]

Hi Jose,

> In a nutshell, what I'm trying to do today is to mark all of our 
> customer's internet traffic that comes into the 7609 with an 
> EXP bit of 
> 1.  From there, it will head towards our core router(s) and we would 
> prefer to be able to assign this traffic into the Best Effort 
> queue that 
> we create on the egress interfaces.

I started off trying to do this 'mark on ingress, queue on egress' design
when I was first putting QoS configs together.  It seems "right" in your
head, but it's (apparently) unnecessary load on the routers, and as you've
found it isn't really the way they're designed to work.

It sounds like the second way you tried ought to work - I don't understand
your comment about not being able to queue on the egress ports.  You should
be able to use something like (assuming your definition of 'Internet
traffic' is 'not rfc1918 traffic'):

Access-list 100 deny ip any 10.0.0.0 0.255.255.255
Access-list 100 deny ip any 172.16.0.0 0.252.255.255
Access-list 100 deny ip any 192.168.0.0 0.0.255.255
Access-list 100 permit ip any any

Class-map match-all INTERNET
 match access-group 100

Policy-map QUEUE-TO-CORE
 class SOME-OTHER-IMPORTANT-STUFF
  priority percent 10
  set mpls experimental 5
 class INTERNET
  bandwidth percent 50
  set mpls experimental 1

Interface ge-wan1/0
 policy-map QUEUE-TO-CORE out

Would probably help if you can post what you've got that doesn't work...

Regards,
Tim.

-- 
____________   Tim Franklin                 e: tim at colt.net 
\C/\O/\L/\T/   Product Engineering Manager  w: www.colt.net 
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