[cisco-bba] Problem traffic shaping individual PPPoE sessions on a Cisco 2621 XM running c2600-telco-mz.123-7.T3.bin

[Whittle, Michael]

Hi Dennis,

Thanks for the info. We are hoping to keep the control of the traffic
shaping on the LAC so hopefully we can find a work around for this.

Cheers,
Mike

-----Original Message-----
From: Dennis Peng [mailto:dpeng at cisco.com] 
Sent: 06 August 2004 15:53
To: Whittle, Michael
Cc: 'cisco-bba at puck.nether.net'
Subject: Re: [cisco-bba] Problem traffic shaping individual PPPoE sessions
on a Cisco 2621 XM running c2600-telco-mz.123-7.T3.bin


I don't think you can shape on the vtemplate when you are the LAC. If this
were the LNS, that would work. If you are doing PPPoEoA, you can shape at
the VC level.

Dennis

Whittle, Michael [michael.whittle at thus.net] wrote:
> 
> We have configured a Cisco 2621XM as a LAC in which we are terminating 
> various PPPoE connections. At the moment the solution is working but 
> the bandwidth that each PPPoE session uses is a bit of a free for all. 
> We would like to limit each PPPoE session to not exceed 512k. I have 
> found some good documentation on the Cisco site which says that this 
> can be done using both , 'service policies' or 'traffic-shape rate' on 
> the Virtual-Template interface. The router accepts the configuration 
> without a problem but for some reason when we check the throughput it 
> exceeds 512k.
> 
> The documentation on the web site bases it's examples on a Cisco 10000 
> platform but I don't think that would make a difference in this case 
> because all the commands we need are supported on the Cisco 2621XM. 
> The IOS we are running is, 'c2600-telco-mz.123-7.T3.bin' which I'm 
> wondering if it may be the problem here. The router we are using also 
> supports Virtual-Template subinterfaces but for some reason if I apply 
> the traffic shaping commands to the Virtual-Template I should see the 
> commands displayed when I use the following command and I don't:
> 
> interface Virtual-Template1
>  description PPPoE Session
>  mtu 1492
>  bandwidth 512
>  ip unnumbered Loopback0
>  no peer default ip address
>  no keepalive
>  traffic-shape rate 512000 8000 8000 1000
> !
> 
> CPR00227-test#test virtual-template 1 subinterface Subinterfaces may 
> be created using Virtual-Template1 CPR00227-test#
> 
> The example above should limit each PPPoE session to 512k but it 
> doesn't seem to work. I have also tried the configuration below and it 
> also isn't
> working:
> 
> policy-map PPPoE-SESSION-TRAFFIC
>  class class-default
>   police cir 512000 bc 96000 be 192000
>     conform-action transmit
>     exceed-action drop
>     violate-action drop
> !
> 
> interface Virtual-Template1
>  description PPPoE Session
>  mtu 1492
>  bandwidth 512
>  ip unnumbered Loopback0
>  service-policy input PPPoE-SESSION-TRAFFIC
>  service-policy output PPPoE-SESSION-TRAFFIC
>  no peer default ip address
>  no keepalive
> !
> 
> CPR00227-test#show policy-map interface Virtual-Template1  
> Virtual-Template1
> 
>   Service-policy input: PPPoE-SESSION-TRAFFIC
> 
>     Service policy content is displayed for cloned interfaces only 
> such as vaccess and sessions
> 
>   Service-policy output: PPPoE-SESSION-TRAFFIC
> 
>     Service policy content is displayed for cloned interfaces only 
> such as vaccess and sessions CPR00227-test#
> 
> Any idea what the problem could be?
> 
> Regards,
> Mike

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