In a message dated 8/8/01 6:50:52 PM Eastern Daylight Time, zmerch(a)30below.com writes: << Rumor has it that Russ Blakeman may have mentioned these words: Curious if any ethernet experts are out there - I finally got my PS/2 9595-OPT server out of storage and built with WinNT4.0 and originally wanted to put two NICs in - one is a 3Com 3C523 with AUI/Coax and the other is a 3C529TP with AUI/RJ45 - both ethernet though. NT finds thema nd seems to agree with them and I am able to give each a TCP/IP address but the network never comes up. If I pull the 523 (or even the 529) it does. Where's the conflict coming from? What's the easiest way to correct this? I've had token ring and ethernet in at the same time int he past fine but the problem seems to be due to the same type of network topology being duplicated. <<<< As they're both 3Com nic's my guess would be is that they're trying to grab the same IRQ (and/or DMA if they use DMA) and there's IRQ conficts with both of them in the machine. The only thing I can think of is if you have some DOS-based 3Com NIC setup software, boot the box with a dos boot disk with 1 of the NICs in the machine, and configure the card to use a different IRQ (like, say, IRQ 5 if you only have one printer port) then shutdown, insert the 2nd card & see if it boots OK. we're talking microchannel here, so the machine will have whatever settings it needs to configure the NICs from the.adf files it loads in. To verify, boot into the IML partition and choose the option to view configuration. If there's a splat (*) beside any of the resources listed for the NICs, there is indeed a resource conflict. that can be changed by choosing the option to change configuration and seeing if there are relevant options to choose. you got NT service pack 3 or higher installed? -- DB Young Team OS/2 old computers, hot rod pinto and more at: www.nothingtodo.org