[c-nsp] Traffic Shaping

Oliver Boehmer (oboehmer) oboehmer at cisco.com
Mon Feb 6 05:41:17 EST 2006

Joseph Jackson <> wrote on Monday, February 06, 2006 9:04 AM:

> ?
> Chuck,
> Thanks for the reply.  Can I do shaping per source ip? I would like
> to only limit the PAT address our internal users source out from so
> then any other address (our ftp and web servers) won't be limited on
> their out going bandwidth.   

you could do CBWFQ (class-based weighted fair-queueing) to allocate a
minimum guaranteeed bandwidth to your ftp/web servers. If this BW is not
used up, your other traffic can use it.

config is somewhat simple:

class FTP-WWW
 match access-group <n>
policy-map OUT
 class FTP-WWW
  bandwidth <m>
 class class-default
  ! all other traffic, we use WRED here, is optional, though.

access-list <n> permit ..<your web+ftp traffic>

int serialX/Y
 service-policy output OUT

Check out the QoS configuration guide for your platform/release..


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