[cisco-bba] To Shape or Police DSL Subscribers ??

[Andy Saykao]

Hi Arie,
 
We have a mixture of 7301's, 7200 VXR's and ASR 1004.
 
Cheers.
 
Andy

________________________________

From: Arie Vayner [mailto:arievayner at gmail.com] 
Sent: Monday, 7 September 2009 5:02 PM
To: Andy Saykao
Cc: cisco-bba at puck.nether.net
Subject: Re: [cisco-bba] To Shape or Police DSL Subscribers ??


Andy,

One thing about shaping is that it takes more resources (mainly CPU)
from the router.
What kind of a router is that?

Arie


On Mon, Sep 7, 2009 at 9:41 AM, Andy Saykao
<andy.saykao at staff.netspace.net.au> wrote:


	Hi All,
	 
	Is it better to shape or police DSL subscribers that have
exceeded their quota or does it not matter which method you choose? We
are currently using CoA with policing but I've been asked to investigate
whether we should look at shaping instead of policing. My testing
reveals that policing is more bursty as seen below. 
	 
	*** Example with Policing ***
	 
	policy-map POLICE-TEST
	  class class-default
	   police 48000 9000 18000    conform-action transmit
exceed-action drop     violate-action drop
	 
	Using: cisco-avpair = "ip:sub-qos-policy-out=POLICE-TEST"

	Download speeds fluctuate between 5.2 - 7.6KB/sec. More bursty.
	 
	*** Example with Shaping ***
	 
	policy-map SHAPE-TEST
	  class class-default
	    shape average 48000
	
	Using: cisco-avpair = "ip:sub-qos-policy-out=SHAPE-TEST"
	 
	
	Download speeds remain at constant 5.6KB/sec. Very little
bursting.
	 
	Any pro's and con's to either method???
	 
	Thanks.
	 
	Andy

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