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Quick question:
Just how do the Intel/Madge/other Ethernet cards with 2 or 4 ports on
them (and in the case of at least one of the Intel cards, an i960
processor, too!) affect all of this? Are there even good drivers for
them? I've used them with success under NT but haven't yet researched
them for the Linux world.
| -----Original Message-----
| From: [EMAIL PROTECTED]
| [mailto:[EMAIL PROTECTED]]On Behalf Of Jeff Mcadams
| Sent: Thursday, August 19, 1999 18:19
| To: Dennis
| Cc: [EMAIL PROTECTED]
| Subject: Re: Router Supported by linux
|
|
| Thus spake Dennis
| >>> Try 2. 100Mbps full duplex fast ethernet card is dealing
| with 200Mbps
| >>> of data total.
|
| >HSSI/T3 is 88Mb/s (full duplex)...but a HSSI card is pretty
| useless without
| >an ethernet. We think that 2 HSSIs and 2 Ethernets is about
| all you can
| >safely use. Remember that each routed packet requires 2 bus
| transfers, so
| >you have to double the bus utilization. If you dont have any
| >ethernet-ethernet traffic it makes things more workable.
|
| Well...but I was accounting for that...since I was considering full
| duplex for each fast ethernet card (same would go for hssi,
| or t1 cards,
| or whatever)...the packet hits the bus on the way in from the
| card, and
| then hits the bus again on the way out the other card...so the full
| duplex figure I was quoting up there accounts for that. So
| you might be
| just a bit over conservative there. I'd rather be over
| conservative in
| this type of thing than oversell what the box could do
| though. :) That
| does, however, illuminate one of the advantages of the cisco type
| boxes...they only hit the PCI bus (or whatever bus they use...many
| are PCI based) only once typically in switching a packet since in
| most situations, the packet is read directly from the incoming
| interface's packet buffer onto the outgoing interface. -- Jeff
| McAdams Email: [EMAIL PROTECTED] Head
| Network Administrator Voice: (502) 966-3848 IgLou
| Internet Services (800) 436-4456 - To
| unsubscribe from this list: send the line "unsubscribe linux-net"
| in the body of a message to [EMAIL PROTECTED]
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