From: Bob Sinclair (bsin@cox.net)
Date: Sat May 07 2005 - 15:56:26 GMT-3
Amit,
Here is an example that might help:
There is a stream of UDP traffic outbound R1 S0/0. It averages 64000 bps, but
is bursty on a random basis. We want to transmit all packets up to the CIR,
24000 bps. Traffic between 24000 bps and 48000 bps gets marked to CS1 and
traffic over 48000 gets dropped.
Here is the policy-map:
policy-map POLICE
class UDP
police cir 24000 pir 48000
conform-action transmit
exceed-action set-dscp-transmit cs1
violate-action drop
Here is the output after running it for a while:
Service-policy output: POLICE
Class-map: UDP (match-all)
2500 packets, 2505000 bytes
30 second offered rate 74000 bps, drop rate 29000 bps
Match: access-group 101
police:
cir 24000 bps, bc 1500 bytes
pir 48000 bps, be 1500 bytes
conformed 969 packets, 970938 bytes; actions:
transmit
exceeded 792 packets, 793584 bytes; actions:
set-dscp-transmit cs1
violated 739 packets, 740478 bytes; actions:
drop
conformed 24000 bps, exceed 22000 bps, violate 29000 bps
The resulting numbers are rough, but approximate the desired result.
HTH,
Bob Sinclair
CCIE #10427, CCSI 30427, CISSP
www.netmasterclass.net
----- Original Message -----
From: Amit Jain
To: Dennis J. Hartmann ; 'ccie2be' ; 'Gary Cheung' ; ccielab@groupstudy.com
Sent: Saturday, May 07, 2005 11:33 AM
Subject: Re: 2 quick questions
When you look at the link
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/qos
_r/qos_o1g.htm#wp1084420
Where the two rate marking is given by explaining command:
police cir "cir" bc "conform-burst" pir "pir" be "peak-burst"
conform-action
"action" exceed-action "action" violate-action "action"
The method of classifying the packets is clear but still the role of
conform-burst and peak-burst is not so clear from the doc.
Can you help ?
Amit
----- Original Message -----
From: "Dennis J. Hartmann" <dhartma5@optonline.net>
To: "'ccie2be'" <ccie2be@nyc.rr.com>; "'Gary Cheung'"
<garymsue@netvigator.com>; <ccielab@groupstudy.com>
Sent: Saturday, May 07, 2005 1:23 AM
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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