[c-nsp] Rate limit or policy-map

[Arie Vayner (avayner)]

Richard,

Using a policer (rate-limit) does not dedicate or allocate any minimal
bandwidth... It creates an upper limit for the specific class.
You should be using the "bandwidth" statement inside the correct
class-map for the relevant traffic.

A very basic config for something that sounds like what you need would
be:

class-map match-all CRITICAL-TRAFFIC
 match access-group 1
!
!
policy-map SERIAL-1-0-EGRESS
 class CRITICAL-TRAFFIC
  bandwidth 256
 class class-default
  bandwidth 512
!
interface Serial1/0
 service-policy output SERIAL-1-0-EGRESS
!
access-list 1 permit 1.1.1.0 0.0.0.255
!

The above config would allocate a minimal rate of 256K for the traffic
originated from 1.1.1.0/24, and would assign a minimal rate of 512K for
all the rest. The remaining bandwidth would be split by the 2 classes.
Also each class can use the other class's unused bandwidth.

For more information, take a look at:
http://www.cisco.com/en/US/docs/ios/qos/configuration/guide/12_4t/qos_12
_4t_book.html

Arie

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Mikisa Richard
Sent: Thursday, November 27, 2008 10:11 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Rate limit or policy-map

Hi all

I have a scenario where I have to dedicate 256K to a particular host out

of my 1M link.  What would  be the best way to go about  it? Should I do

a simple interface rate limit or should I do a policy and police off
that ?

Regards
Richard.
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