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

[Arie Vayner]

So from the performance point of view, you would see a hit if you use many
shapers on the software based boxes (7301/7200). On ASR it should be better.
I have seen many ISPs use policing, and it worked just fine.

Arie

On Mon, Sep 7, 2009 at 10:03 AM, Andy Saykao <
andy.saykao at staff.netspace.net.au> wrote:

>  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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