> From: Andrew Fort <afort@staff.webcentral.com.au>
> To: "'Siva Valliappan'" <svalliap@cisco.com>
> Cc: cisco-nsp@puck.nether.net
> Subject: RE: [nsp] Requesting comments on 7401 pricing
> Date: Tue, 10 Jul 2001 12:14:28 +1000
>
> >it may be (if you are hitting the 30 kpps @ 320 megs) you are hitting
> >the limitation of the PA-GE. the PA-GE is a connectivity solution
> >and does not give you wire rate performance. the IO based GE
> >interfaces
> >and the GE interfaces on the 7400 can give you much higher performance.
>
> oh, so it's better to get the IO-controller GE than the PA-GE on a 7200VXR?
> "can" give you much higher performance? (can you give more detail about the
> circumstances upon which you will see higher performance?)
From previous discussion, it seems that the beast sitting on the IO controller
has access to twice the bandwidth of one in a slot. Whether this is due to
a 2x PCI rate implementation or access to both PCI busses is unclear, I'd
guess the first.
Of course unless it's a stem-router application, the packets still need to
go somewhere else, so you're still not talking wire-speedy Gig-E -> Gig-E.
George
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