[cisco-bba] 5000 PPPoA sessions

[Sebastian Dehne]

Thanks a lot. Sounds very convenient! I'll let you know how it is going
once all sessions are up.

greetings,
Sebastian

Andy Schutz (aschutz) (aschutz at cisco.com) wrote:
> Sebastian,
> 
> Good catch, I didn't mean bps with the memory...I meant 1GB and 512MB.
> Sorry for the confusion.
> 
> Since the only level of QoS you are doing is via ATM, this is offloaded
> of the CPU and on to the SAR so you shouldn't incur any additional CPU
> when you configure CBR vs. straight UBR.  In regards to the acceptable
> CPU percentage, this is a judgment call.  I know some customers have
> their CPU at 90% or more all the time and are happy where as others put
> a cap at 50% or so.  In my mind, I would fell uncomfortable at 90%
> because if for instance I wanted to add something down the line, I
> wouldn't have the CPU to allow me to do so.  So, 60% would be OK for me,
> but getting higher than 75% or so for me is too high to feel
> comfortable.  But again, it is personal preference/philosophy.  
> 
> The NPE-G1 can terminate 16,000 sessions on the 7200 on two PA-A6 but
> the CPU can be quite high when they are all terminated and running high
> traffic loads.  That said, 5000 sessions shouldn't be a problem on the
> NPE-G1.  Also, consider while you have 5,000 sessions terminated at any
> one point time, more than likely only a fraction of them are actually
> using their session at that point in time.  In other words, all the
> users won't be sending/receiving data all at the same time.  
> 
> I hope this helps,
> 
> Andy
> 
> > -----Original Message-----
> > From: Sebastian Dehne [mailto:sebastian at infopact.nl] 
> > Sent: Friday, December 05, 2003 8:40 AM
> > To: Andy Schutz (aschutz)
> > Subject: Re: [cisco-bba] 5000 PPPoA sessions
> > 
> > 
> > Andy,
> > 
> > Thanks for your response.
> > 
> > What do you mean by bit per seconds memory?
> > 
> > About QoS: We will configure some lines to be CBR, VBR or 
> > UNR; but no more QoS than that.
> > 
> > And is a NPE-1G just enough? Or more than enough? I dont think having
> > the CPU on 60% constant is a good thing, or?
> > 
> > greetings,
> > Sebastian
> > 
> > Andy Schutz (aschutz) (aschutz at cisco.com) wrote:
> > > Sebastian,
> > > 
> > > On the 7200, I would go with the NPE-G1 with 1Gbps of 
> > memory.  You might
> > > be able to get away with 512Mbps of memory though.  What 
> > else is going
> > > on in the box?  Are you doing just session termination or 
> > adding things
> > > like QoS, multicast, or other various IOS goodies?
> > > 
> > > Cheers,
> > > 
> > > Andy
> > > 
> > > > -----Original Message-----
> > > > From: cisco-bba-bounces at puck.nether.net 
> > > > [mailto:cisco-bba-bounces at puck.nether.net] On Behalf Of 
> > > > Sebastian Dehne
> > > > Sent: Thursday, December 04, 2003 1:49 PM
> > > > To: cisco-bba at puck.nether.net
> > > > Subject: [cisco-bba] 5000 PPPoA sessions
> > > > 
> > > > 
> > > > Hi list,
> > > > 
> > > > What would be the hardware requirements to handle about 5000 PPPoA
> > > > sessions on a 7200 (or a 7500)? Which NPE or how much memory?
> > > > 
> > > > greetings,
> > > > Sebastian
> > > > 
> > > 
> > 
> > 
> 

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