On Thu, 19 Aug 1999, Jeff Mcadams wrote:
> While I basically agree with you...a few points to correct.
>
> Thus spake Harry McGregor
> >out), and you get 50Mbytes/sec of useable bandwidth. That is
> >400Mbits/sec, or almost the speed of 10 DS3 lines, or 4 100Mbit full
> >duplex network cards.
>
> Try 2. 100Mbps full duplex fast ethernet card is dealing with 200Mbps
> of data total.
Yep, I was thinking that my original halving of bandwidth would account
for it, but realized soon after posting that it would not
esentialy this is what you have
Incoming ======800Kbit/sec pipe========= outgoing
outgoing ======same pipe================ incoming.
Hopefully we will soon have some GOOD implimentations of PCI 64Bit, and
even PCI 66MHz (requires 3.3v bus instead of the current 5v 33MHz).
64bit @ 66MHz would be 528Mbytes/sec of bandwidth (again drop a bit for
over head, and make it 500). That would give you 4Gbit/sec of bandwidth.
I am not trying to say that LRP beats any CISCO product, but it does do
very well for the lowerend (do not try to compair a 75K+ bit of hardware
to a 1-3K PC!) routers from cisco, etc.
Once the PC hardware gets to the point it should have been at 2 years ago,
things will do much better.
> >The cisco 7xxx series is mostly impliment in hardware (I think), and is
> >not a "software" router.
>
> No, the 7xxx series is a "software" based router (ie, there aren't ASICs
> doing the routing and switching), but it does (at least on the 75xx's)
> use distributed processing. Meaning the RSP card (which is the main CPU
> card) does the processing of routing protcol information, building a
> routing table, building a forwarding table and all that (processing CLI
> logins, etc.), but that large parts, or possibly (depending on the
> configuration) all of the actual route selection and switching of the
> packets can be offloaded to the Interface Processor cards (VIP cards).
Thanks for the correction. What routers do you know of (under 250K) that
use custom ASICs?
> --
> Jeff McAdams Email: [EMAIL PROTECTED]
> Head Network Administrator Voice: (502) 966-3848
> IgLou Internet Services (800) 436-4456
>
Harry
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