There is more to it than that, Engines 0-3 are 2.5G cards and run in GSRs
with either 2.5G or 10G switch fabric. The Engine 4 cards require 10G switch
fabric which means upgraded 12016s or the newer 124xxs, they will not run on
12008s or 12012s.
According to our Cisco SE the only significant (and that it is) difference
between the Engine 2 and 3 is that the Engine 3 is capable of outbound
processing (marking, ACLs etc) in hardware, whereas the Engine 2 is most
definitely not, both have the same forwarding rate (I think 4mpps). The rest
of the differences are in the configuration available ...
Rod Oliver
> -----Original Message-----
> From: Tony Tauber [mailto:ttauber@genuity.net]
> Sent: 31 January 2002 21:05
> To: Jared Mauch
> Cc: Gert Doering; cisco-nsp@puck.nether.net
> Subject: Re: [nsp] GSR Engine 1/2/3/4? huh?
>
>
> On Thu, 31 Jan 2002, Jared Mauch wrote:
> > On Thu, Jan 31, 2002 at 07:41:22PM +0100, Gert Doering wrote:
> > > Hi,
> > >
> > > is there a document that explains the difference between "engine
> > > 1", "engine 2", ..., "engine 4" line cards for the GSR?
> > >
> > > Is there a simple way to say "this one is better than that one",
> > > like "the higher the number, the better the card"?
> > >
> > > gert
>
> > the higher the number the better the card.
> >
>
> I think it's safer to say "the higher the number, the faster the card"
>
> Different interface types come out on different Engine types.
>
> For instance, Engine 4 is OC192 and QuadOC48 but doesn't
> really offer "features" which Engine 3 is supposed to, though
> for the lower speeds.
>
> Faster != Better
>
> You get the idea.
>
> Tony
>
>
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