Znyx (www.znyx.com) and Adaptec both make quad cards based on the DEC Tulip chip. I think Intel has a dual 82558 card. Expect to pay a substantial premium over the per-interface cost of single cards. You have to weigh that against the convenience/efficiency/etc. of getting all those ports into one box. Can't say whether these will work with Linux. I use FreeBSD. I have one box (a Pentium 133, if I recall correctly) with 14 Ethernet interfaces: 3 quad cards, 1 single, and an ISA NE-2000 clone on a particularly lightly used network. Works fine. The limiting factor ends up being PCI bus bandwidth. You'll be hard pressed to squeeze more than 100-150 Mb/s of total throughput out of the router, since every bit takes two trips across the PCI bus: from the device to main memory, and back. If you can figure out how to diddle IP headers while the packet is in the card's buffers, and then do a card-to-card PCI transfer (i.e., without going to main memory), you can probably do a bit better. I haven't tried this, so consider it a hypothesis. Jim Shankland Flying Fox Computer Systems, Inc.