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

[Whittle, Michael]

Hi Tassos,

I have already tried that:

CPR00227-test#show policy-map interface Virtual-Template 1
 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

---
As you can see above each service policy "should" be cloned for each
session. It doesn't look like it's able to break down the stats for each
policy because they would be created and destroyed dynamically.

I have an idea of what the problem is here but I'm not sure how to fix it.

I found some documentation on the Cisco site describing how to configure
this using, 'traffic-shape rate': 
http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1839/products_feat
ure_guide09186a00800f4b47.html#wp1043828 

What the document says I should be seeing: 

--- 
Examples 
The following example tests virtual template 1 to determine if it can
support subinterfaces. The output shows that the traffic-shape rate 50000
8000 8000 1000 command that is configured on virtual template 1 prevents the
virtual template from being able to support subinterfaces. 

Router# test virtual-template 1 subinterface 

Subinterfaces cannot be created using Virtual-Template1 

Interface specific commands: 

traffic-shape rate 50000 8000 8000 1000 
--- 

What I'm seeing: 

CPR00227-test#test virtual-template 1 subinterface 
Subinterfaces may be created using Virtual-Template1 
CPR00227-test# 

I'm not seeing the, 'Interface specific commands' which I think is the
problem here. For some reason when the subinterface is created when the
PPPoE session is established it's not carrying through the traffic shaping
configuration.

We are going to try and configure this on another platform and see if it
makes a difference but this should be working. I'm wondering if there's
something that could be enabled or disabled that would sort this out.

Any ideas? 


-----Original Message-----
From: Tassos Chatzithomaoglou [mailto:achatz at forthnet.gr] 
Sent: 06 August 2004 11:57
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




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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> cisco-bba mailing list
> cisco-bba at puck.nether.net 
> https://puck.nether.net/mailman/listinfo/cisco-bba

-- 
***************************************
         Tassos Chatzithomaoglou
Network Design & Development Department
              FORTHnet S.A.
          <achatz at forthnet.gr>
***************************************