From: mani poopal (mani_ccie@yahoo.com)
Date: Mon May 09 2005 - 18:03:17 GMT-3
Hi San,
Thanks for getting back to me. I think I have to clear the core concepts, so according to you if there are two access list entries with the same acl number, and in order to go the next acl line we need continue and not to other acls.
=================================================
acl 101 permit tcp any any eq 80-->exceed action set-prec-continue
acl 101 permit tcp any any eq 23-->exceed action set-prec-transmit(no other acl in 101 is there but still CAR will read the next line, different acl)
acl 102 permit tcp any any eq 21-->exceed action set-prec-transmit
======================================================
Please have a look and confirm.
thanks
Mani
remaining---------------------------------->exceed action drop
san <san.study@gmail.com> wrote: Mani,
You probably have understood the question in a different manner.
"Any Remaining traffic" means non -access-list of 101. If that is the
case, we cannot use continue.
Attaching good example from IP qos book , srinivas. on topic "continue"
------------------------------------------------------------------------------------------
Limiting a Particular Application's Traffic Rate at a Service Level
A service provider has one of its premium customers define its traffic
service level. All customer traffic except Hypertext Transfer Protocol
(HTTP) (Web) traffic over a rate of 15 Mbps is marked with an IP
Precedence of 4. HTTP traffic over a rate of 15 Mbps is transmitted
with an IP Precedence of 0. The customer has a 30-Mbps service from
the service provider.
Limiting HTTP Traffic at a Service Level to a Specific Rate
Interface Hssi1/0/0
rate-limit input 30000000 15000 15000 conform-action continue
exceed-action drop
rate-limit input access-group 101 15000000 10000 10000 conform-action
set-prec-transmit 4 exceed-action set-prec-transmit 0
rate-limit input 30000000 15000 15000 conform-action set-prec-transmit
4 exceed-action set-prec-transmit 4
!
access-list 101 permit tcp any any eq www (1051 port talking to port 80)
access-list 101 permit tcp any eq www any (( port 80 talking to 1051 ))
The first CAR statement is used to rate-limit all incoming traffic to
30 Mbps. It uses a continue action so that you continue to the next
rate-limit statement. The second rate-limit statement is used to set
the IP Precedence value for HTTP traffic based on its traffic rate.
The last rate-limit statement is used to set the IP Precedence value
to 4 for all non-HTTP traffic
/SAN
On 5/9/05, mani poopal wrote:
> Hi Group,
>
> The question in the book is
>
> "configure CAR on R6 a3/0, so that web traffic will be sent but using ip precdence 5 for web traffic that conforms to the first rate policy, non conforming web traffic uses ip precedence 0. Any remaining traffic is limited to 8mbps, with normal burst size of 16,000 bytes and an excess burst size of 24000 bytes. Traffic that conforms should sent with ip precedence 5 and traffic that does not conform should be dropped"
>
> solution in the book:
> int atm3/0
> rate-limit output access-group 101 20000000 24000 32000 confrom-action set-prec-transmit 5 exceed-action set-prec-trasnmit 0
> rate-limit output 8000000 16000 24000 confrom-action set-prec-transmit 5 exceed-action drop
>
> access-list 101 permit tcp any any eq www
>
> Guys, I have 2 questions:
> 1. for the first rate policy the limit is not given
> 2. I think the first rate policy statement should be
> "rate-limit output access-group 101 20000000 24000 32000 conform-action set-prec-transmit 5 exceed-action set-prec-continue 0
> So the question is is set-prec-transmit 5 is right or it should be set-prec-continue 0, I think later is right because if you don't put continue it wont read the second rate-limit statement. Any suggestions are appreciated, I would be happy if scott, Brian or Marveen comes to give any suggestions to this doubt.
> Again thanks a lot for all the answers.
>
> thanks
>
> Mani
>
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