From: Lord, Chris (chris.lord@lorien.co.uk)
Date: Fri Sep 10 2004 - 07:33:00 GMT-3
Tim,
If you type into the router the two constructs exactly as you have them, you will find that the "police X" command you type-in gets converted into "police cir X" when you do a sh run. Hence the two are identical and utilise a single bucket construct.
However, it is the syntax of the more sophisticated options which may be specified which determines whether the new or old two-bucket construct is used as per Bob's description.
Chris
-----Original Message-----
From: Bob Sinclair [mailto:bsin@cox.net]
Sent: 09 September 2004 02:14
To: ccie2be; Group Study
Subject: Re: MQC QOS
Tim,
I think you will find that the practical effects of the commands as you
enter them are the same. The police cir/pir syntax is a 12.2(4)T feature
that implements a Two Rate Three Color Marker per RFC 2698. With this
feature you can specify two independent rates to set the boundaries of
conform/exceed/violate. This is more sophisticated and easier to implement
than the single-rate, two-bucket (be) three-color marker. Here is an
example of using cir/pir:
police cir 1000000 pir 2000000 conform transmit, exceed set-dscp-transmit 10
violate drop
The first 1 Mbps conforms, traffic between 1 and 2 Mbps exceeds, and traffic
over 2 Mbs violates. This is easier with this syntax than with the old,
where you would have to figure out a Be for the upper limit.
HTH,
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: "ccie2be" <ccie2be@nyc.rr.com>
To: "Group Study" <ccielab@groupstudy.com>
Sent: Wednesday, September 08, 2004 8:30 PM
Subject: MQC QOS
> Hi guys,
>
> What's the difference between these 2 constructs?
>
> police cir 256000
>
> police 256000
>
> My goal is to restrict traffic to 256000 bps.
>
> TIA, Tim
>
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