From: Henk de Tombe (henk.de.Tombe@qi.nl)
Date: Thu Jan 03 2008 - 08:39:42 ARST
Hi Frog,
Please take a look at the following doc:
http://www.xs4all.nl/~hdetombe/gs/qos.zip
I've been testing in the lab what happens with burstsizes and captured
this in a couple of graphs to make it clear for myself. Together with
some great explanations in the Group I'm sure You'll find your answer
:-)
Regards,
Henk
Kijk op www.qi.nl voor meer informatie.
-----Oorspronkelijk bericht-----
Van: nobody@groupstudy.com [mailto:nobody@groupstudy.com] Namens
Radioactive Frog
Verzonden: donderdag 3 januari 2008 9:46
Aan: Cisco certification
Onderwerp: policing doubt - bursty traffic behavior
Hi guys,
Command: police 10megs 1megs conform-action transmit exceed-action drop
My understanding is in above command when we do policing, 10 megs link
would
able to transmit 11 megs if bandwidth is available on the link. But I am
too
much confussed by looking at the below documents with different
argument:
Cisco says: 1 megs parameter won't do anything e.g. 10 megs policy rate
will
be only 10 megs (it wont go to 11 megs with burst).
Juniper doc says: bursting will be additioan to the 10 megs so link
would be
able to transmit 11 megs (10megs+1megs burst).
Can someone clearify this to me please....
Cisco document says about policing: " Policing Propagates bursts. Does
no
smoothing."
http://www.cisco.com/en/US/docs/ios/12_0/qos/configuration/guide/qcpolts
.html#wp5221
Juniper document says: "
"Policing employs the *token-bucket algorithm*, which enforces a limit
on
average bandwidth while allowing bursts up to a specified maximum value.
It
offers more flexibility than the *leaky bucket algorithm* (see Configure
Receive and Transmit Leaky Bucket
Properties<http://www.juniper.net/techpubs/software/junos/junos42/swconf
ig-interfaces42/html/interfaces-physical-config12.html#1013471>)
in regulating bursty traffic and never discards packets."
http://www.juniper.net/techpubs/software/junos/junos42/swconfig-interfac
es42/html/firewall-config18.html
Frog
This archive was generated by hypermail 2.1.4 : Fri Feb 01 2008 - 10:37:57 ARST