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

[Tassos Chatzithomaoglou]

Whittle, Michael 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#
> 

When you ahve some users connected, try
"show policy-map interface Virtual-Access X"
where X is the va interface number where the user is connected.

> Any idea what the problem could be?
> 
> Regards,
> Mike
> 
> 
> ------------------------------------------------------------------------
> 
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-- 
***************************************
         Tassos Chatzithomaoglou
Network Design & Development Department
              FORTHnet S.A.
          <achatz at forthnet.gr>
***************************************