[c-nsp] Re: Cisco 7513 & Bandwidth Points

[Rodney Dunn]

I shouldn't have said "doesn't touch".

I meant from a feature standpoint the
RP wasn't involved in moving the packet
through the box.  For the other things
you describe it does "touch" the RP.

Sorry for my bad choice of words on that
one.

Rodney

On Fri, Jan 14, 2005 at 03:23:43PM -0500, Matthew Crocker wrote:
> 
> On Jan 14, 2005, at 8:36 AM, Rodney Dunn wrote:
> 
> >
> > Noel, Tom,
> >
> > There are limitations on the 75xx's depending on the
> > RSP/VIP setup you have.
> >
> > It's a distributed platform that does software
> > based forwarding when running in dCEF mode.
> > All packet are switched by the VIPs and never
> > touch the RP.  Therefore the switching capacity
> > is a function of the speed of the VIPs and the
> > features you have enabled in the packet path
> > (ACL's, QOS, etc..).
> >
> 
> Doesn't the RP handle the timing on the CyBus (1.2 gbps) and doesn't it 
> touch the packet when it travels between VIPs on different CyBUSes 
> (7513 has 2)?  Bus arbitration is done on the RP ?? The 7500 doesn't 
> have CSC card like the 12k series
> 
> 
> 
> 
> > The short answer is there isn't a bandwidth concept
> > like there is with the 72xx.  However, you can
> > overload the VIP with the right PA combination and
> > features. The matrix of performance will depend on
> > the features, ppps, and VIP type.
> >
> > There have been extensive discussions
> > about this on cisco-nsp so if there are further questions
> > I'd suggest we move it over there and I can add more.
> >
> > Thanks,
> > Rodney
> >
> > On Thu, Jan 13, 2005 at 09:09:28PM -0500, Noel Montales wrote:
> >>
> >> On-List replies perhaps may be usefull.. Or could you post a summary 
> >> of
> >> your findings?
> >>
> >> Regards,
> >> Noel Montales
> >>
> >> Claydon, Tom said:
> >>>
> >>> Hello,
> >>>
> >>> We are moving from a Cisco 7206 to a 7513, and I was wondering if we
> >>> will be limited by bandwidth points on the 7513 (as we are with the
> >>> 7206). From the sparse documentation I've found so far, it doesn't
> >>> appear that this limitation exists in the 7513, correct?
> >>>
> >>> Off-list replies are welcomed.
> >>>
> >