From: Yasser Aly (blackyeyes00@hotmail.com)
Date: Sat Apr 10 2004 - 10:14:27 GMT-3
Dear All,
The task is saying that " R1 should not send more than 128Kbps of ICMP "
to avoid congestion. Configure your network so that ICMP traffic is limited
to 128Kbps. Allow for a burst of 1/4th of this rate.
The solution offered is:
==============
ip cef
!
class-map match-all ICMP
match protocol ICMP
!
policy-map police POLICE_ICMP
class ICMP
police cir 128000 bc 4000
!
int e0/0
service-policy output POLICE_ICMP
================
If I am going to solve this using rate-limit it would be
rate-limit output 128000 16000 24000 conf orm-action transmit exceed-action
drop.
Mapping the rate-limit statement to the MQC config, I would make the police
statment as follows
police cir 128000 bc 16000 be 20000
or
police cir 128000 bc 16000 be 4000
My calculations are based on 128000/8 = 16000 & 1/4 of 16000 is 4000
Can someone explain the difference between these statments in meaning.
Which one is correct and why ?
Thanks,
Yasser
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