[nsp] C7200 Bandwidth Points

[Stephen J. Wilcox]

Theyre not unlimited altho I dont know what they are off hand.. both 7200 or 
7200vxr are quite easy to overload. 

on the 7200 the bus can be an issue and you will see errors on the interface eg 
throttles etc when the unit as a whole is loaded up. there are some interesting 
subtleties too such as if u use a multiport adaptor eg PA-2FE you can load them 
higher by switching between the two ports as your not using the backplane!

on both 7200 and vxr the thing you are likely to run into also is CPU, they have 
one cpu for switching and routing and even a modestly loaded router will hit cpu 
limit once you start running a couple of routing protocols and holding a couple 
of copies of the full BGP table!

imho the limit of these systems is found by experience, take a few of these 
7200s play with them for a few months and you'll come to know your router quite 
well and instinctively know when you can get away with something or if your 
going to hit trouble :)

Steve

On Fri, 11 Jul 2003, Jason Lixfeld wrote:

> Ah!  you didn't specify VXR! :)
> 
> I've never heard of a points system for backplane before.  I thought 
> VXRs were pretty much unlimited.  Well, short of the obvious -- you get 
> a NPE-G1, I/0-GE and 1 PA-GE for each slot and drive ALL of them, you 
> are going to run into problems.
> 
> On Friday, July 11, 2003, at 3:15 PM, Temkin, David wrote:
> 
> > Thanks.  I am speaking about the VXR, but certain adapters I'm using 
> > (the
> > SA-VAM2 for example) require 600 points off the bat.  I thought that 
> > was a
> > little ludicrus.
> >
> > Thanks,
> >
> > -Dave
> >
> > -----Original Message-----
> > From: Jason Lixfeld [mailto:jason at lixfeld.ca]
> > Sent: Friday, July 11, 2003 3:13 PM
> > To: Temkin, David
> > Cc: cisco-nsp at puck.nether.net
> > Subject: Re: [nsp] C7200 Bandwidth Points
> >
> >
> > It will usually just error.  I beat the shit out of a 7206 back in the
> > day and it ran and ran and ran, but not without it complaining about
> > unsupported configurations, etc.  I think I had 4 FastEs and 2 DS3s in
> > it.  Also, that was in the days of 11.1 code.  They may have done
> > something to later revs of 7200 code to make the device unusable
> > because they were trying to push VXRs.  That being said. I wouldn't
> > recommend it, especially now when you can get a VXR chassis on the used
> > market for next to nothing.  VXRs are godly!
> >
> > On Friday, July 11, 2003, at 2:30 PM, Temkin, David wrote:
> >
> >> 'nother question.  I understand how bandwidth points work on the 7200
> >> series, however, if I'm building a system and I know that I won't be
> >> using interfaces to their full potential (ie, there's an extra FE or
> >> DS-3 interface in it) and it exceeds the maximum amount of points per
> >> the NPE,
> >> will the system run correctly or will it error?
> >>
> >> Thanks,
> >>
> >> -Dave
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