achatz at forthnet
Aug 6, 2004, 4:23 AM
Post #3 of 3
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Re: Problem traffic shaping individual PPPoE sessions on a Cisco 2621 XM running c2600-telco-mz.123-7.T3.bin
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no "Virtual-Template 1", but "Virtual-Access x"
Whittle, Michael wrote:
> 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]
> Sent: 06 August 2004 11:57
> To: Whittle, Michael
> Cc: 'cisco-bba [at] puck'
> 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
>>
>>
>>----------------------------------------------------------------------
>>--
>>
>>_______________________________________________
>>cisco-bba mailing list
>>cisco-bba [at] puck
>>https://puck.nether.net/mailman/listinfo/cisco-bba
>
>
--
***************************************
Tassos Chatzithomaoglou
Network Design & Development Department
FORTHnet S.A.
<achatz [at] forthnet>
***************************************
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