From: Dennis J. Hartmann (dhartma5@optonline.net)
Date: Tue May 10 2005 - 22:50:15 GMT-3
You're correct in that you will only use a SRTCM unless the PIR is
specified. Without a PIR, you can't have a violate-action and/or a Be. The
PIR is more important than the CIR command. Good investigative work. It
appears like the CIR command is inserted if you specify a PIR, because the
PIR structure requires the TRTCM.
Cheers,
Dennis Hartmann
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
simon hart
Sent: Monday, May 09, 2005 1:16 AM
To: Dennis J. Hartmann; 'ccie2be'; 'Gary Cheung'; ccielab@groupstudy.com
Subject: RE: 2 quick questions
Dennis,
I am not sure that Police cir and Police are any different unless the PIR
command is offered. Let me explain
If I use the command
police 64000
The IOS will automatically insert the cir keyword
policy-map QOS
class class-default
police cir 64000
If I look at this policy then it does seem to be SRTCM
Policy Map QOS
Class class-default
police cir 64000 bc 2000
conform-action transmit
exceed-action drop
Similarly if I use the command (again without the keyword cir)
police 128000 bc 1000 pir 256000 be 1000
then the IOS will insert the keyword, see below
Policy Map TESTQOS
Class class-default
police cir 128000 bc 1000 pir 256000 be 1000
conform-action transmit
exceed-action drop
violate-action drop
I think Tim's statement that there is no difference between Police cir and
Police is essentially correct. The fundemental difference is the use of PIR
keyword, this changes the police metering from either TRTCM or SRTCM.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Dennis J. Hartmann
Sent: 06 May 2005 20:53
To: 'ccie2be'; 'Gary Cheung'; ccielab@groupstudy.com
Subject: RE: 2 quick questions
The 2 police commands are DRASTICALLY different. When you use the
"cir" keyword, you're using a two-rate, three color marker (TRTCM-RFC2698),
and when you don't use the cir keyword, you're using a single-rate, three
color marker (SRTCM-RFC2697).
What does SRTCM and TRTCM mean in simpler terms? The ability to set
a PIR (peak information rate) is ONLY in the TRTCM using the cir option.
-Dennis Hartmann (self-proclaimed QoS expert) ;-)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccie2be
Sent: Friday, May 06, 2005 3:16 PM
To: 'Gary Cheung'; ccielab@groupstudy.com
Subject: RE: 2 quick questions
Gary,
1. The dialer load-threshold command can be configured on only 1 side or
both sides. However, if it's configured on both sides, you don't want the
command to bring up the 2nd circuit at the same time since then it's
possible for both sides to try to bring up the circuit and both sides will
find the 2nd circuit busy.
2. I don't think there's any difference but the best way to be sure is to
use the show policy-map intX command to see the results.
HTH, Tim
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Gary
Cheung
Sent: Friday, May 06, 2005 1:42 PM
To: ccielab@groupstudy.com
Subject: 2 quick questions
1) does the command " dialer load-threshold" require to enter in both ISDN
routers or single router only?
2) Any difference in between this two command "police" and "police cir"? Any
criteria in choosing between them?
Gary
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