Cisco 7206 IOS for PPPoE Termination

Mark Gauvin MGauvin at dryden.ca
Sun Sep 23 20:49:38 UTC 2012


You are joking I hope 

Sent from my iPhone

On 2012-09-23, at 3:38 PM, "Shahab Vahabzadeh" <sh.vahabzadeh at gmail.com> wrote:

> Dear Paul,
> Thanks for you reply, May I have those optimization knobs for
> virtual-template and throttles?
> Maybe looking into your configurations help me in this field.
> I will look for the service  provider image too.
> Thanks
> 
> On Sun, Sep 23, 2012 at 11:17 PM, PC <paul4004 at gmail.com> wrote:
> 
>> For this application, you may wish to consider the service provider images.
>> 
>> The latest 15.x(S) image works, as it is the derivative of what was
>> formerly the service-provider oriented 12.2(SRx) images.
>> 
>> However, it's unlikely to drop steady state CPU, but it may contain some
>> optimizations for concurrent PPP (re)negotiations on the G2 platform during
>> session recovery.
>> 
>> PPPoE will generally handle more users on ethernet as it is easier to push
>> packets on when not dealing with the ATM encapsulations, but to what extent
>> this holds true on the 7200, I can't tell you for sure.
>> 
>> I'd also read the broadband aggregation guide under the IOS documentation
>> on cisco.com, and tune all the knobs that may help you, there are some
>> pointers on what items on virtual-templates are punitive in performance,
>> other optional items such as disabling SNMP counters on virtual access
>> interfaces to reduce cpu usage, and other items that may help little by
>> little.  There are also various knobs to throttle PPPoE renegotiation rates
>> during recovery.
>> 
>> I wish you luck (and consider getting another and/or bigger router to
>> split the load).
>> 
>> On Sun, Sep 23, 2012 at 1:23 PM, Shahab Vahabzadeh <
>> sh.vahabzadeh at gmail.com> wrote:
>> 
>>> Which software you used before for them?
>>> 
>>> On Sun, Sep 23, 2012 at 10:43 PM, Rinse Kloek <rinse.kloek at isp.solcon.nl
>>>> wrote:
>>> 
>>>> 6000 PPP users on a NPE-G2 is way too much imho. Currently we do no more
>>>> than 3000 users on a NPE-G2 with PPPoA. (Max cpu 50%).
>>>> 5 years ago, we did about 5000 users on a NPE-G2, but as traffic ratio's
>>>> grow each year the maximum users a NPE-G2 can handle will drop each
>>> year.
>>>> Don't forget an NPE-G2 is a software based plaform, so traffic
>>> forwarding
>>>> is done in software CPU.
>>>> 
>>>> regards,
>>>> Rinse Kloek
>>>> Op 23-9-2012 20:51, Shahab Vahabzadeh schreef:
>>>> 
>>>>> Hello everybody,
>>>>> I am using C7206 VXR NPE-G2 routers as BRAS in my network and the
>>> current
>>>>> IOS is *c7200p-adventerprisek9-mz.**124-24.T.bin* on them.
>>> 
>>>>> 
>>>>> Also their memory upgraded to 2GB instead of 1GB.
>>>>> And I have near 6500 online user on each of my BRAS and there is no
>>>>> speciefic feature except aaa with radius and ordinary features.
>>>>> There router is also terminating dot1q too because my PSTN centers
>>> traffic
>>>>> comes through dot1q vlans to BRAS es.
>>>>> I think I have some problem with current IOS, My CPU Usage is abnormal
>>> and
>>>>> Its near %70 or %80.
>>>>> And when I have a network problem and some of PSTN centers goes down
>>> CPU
>>>>> go
>>>>> to %99 and it gets problem to recovery.
>>>>> Do you know any good IOS for me as a service provider to use?
>>>>> I heard that some service providers have near 8000 online user on 7206.
>>>>> Thanks
>>>>> 
>>>>> 
>>> 
>>> 
>>> --
>>> Regards,
>>> Shahab Vahabzadeh, Network Engineer and System Administrator
>>> 
>>> Cell Phone: +1 (415) 871 0742
>>> PGP Key Fingerprint = 8E34 B335 D702 0CA7 5A81  C2EE 76A2 46C2 5367 BF90
>>> 
>> 
>> 
> 
> 
> -- 
> Regards,
> Shahab Vahabzadeh, Network Engineer and System Administrator
> 
> Cell Phone: +1 (415) 871 0742
> PGP Key Fingerprint = 8E34 B335 D702 0CA7 5A81  C2EE 76A2 46C2 5367 BF90



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