[cisco-bba] IP DSLAM & PPPoE question

[Andy Schutz (aschutz)]

Jon,

Forgot to add the link that lists the IDB limitations:

http://www.cisco.com/en/US/partner/products/sw/iosswrel/ps1835/products_
tech_note09186a0080094322.shtml#idb_limits

Andy

> -----Original Message-----
> From: Andy Schutz (aschutz) [mailto:aschutz at cisco.com] 
> Sent: Saturday, August 30, 2003 10:39 AM
> To: 'jlewis at lewis.org'; 'Dennis Peng'
> Cc: 'cisco-bba at puck.nether.net'
> Subject: RE: [cisco-bba] IP DSLAM & PPPoE question
> 
> 
> Jon,
> 
> There are a number of factors that go into determining the 
> sessions possible on these platforms.
> 
> - memory on the router
> - desired throughput per session
> - what else is configured on the router (eating CPU)
> - IDB limitations
> 
> So keeping all those factors in mind, there really isn't a 
> set number that is a guideline.  However, the officially 
> supported number on the 7200 platform with 512MB DRAM is 16k 
> PPPoE sessions terminated (running 12.2(8)B or later).  On 
> the 3640, the top end limitation is the IDBs on the box, and 
> with that in mind, you are capped at 800 PPPoE sessions.  You 
> will notice that the 7200 is listed here with 10000 IDBs, but 
> this limitation is avoided using the subVAI capability code 
> that was introduced in the IOS rev previously mentioned.
> 
> I hope this helps answer your question.
> 
> Cheers,
> 
> Andy
> 
> > -----Original Message-----
> > From: cisco-bba-bounces at puck.nether.net 
> > [mailto:cisco-bba-bounces at puck.nether.net] On Behalf Of 
> > jlewis at lewis.org
> > Sent: Wednesday, August 20, 2003 10:18 AM
> > To: Dennis Peng
> > Cc: cisco-bba at puck.nether.net
> > Subject: Re: [cisco-bba] IP DSLAM & PPPoE question
> > 
> > 
> > On Wed, 20 Aug 2003, Dennis Peng wrote:
> > 
> > > > Can a 7200/7100 be used for such a 
> > > > scenario?
> > > 
> > > Yes. Or if you don't need as many sessions aa 3600/3700 
> > would also do.
> > 
> > How many sessions would you expect to be possible on a 3640 or 7206 
> > dedicated to routing PPPoE sessions?
> > 
> > 
> ----------------------------------------------------------------------
> >  Jon Lewis *jlewis at lewis.org*|  I route
> >  System Administrator        |  therefore you are
> >  Atlantic Net                |  
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