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

Arie Vayner arievayner at gmail.com
Mon Sep 7 03:01:47 EDT 2009


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


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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