Multiple NIC problem

duncnz

I've got two computers with two NICs each. Each computer has a NIC that accesses the internet via a cheap router/switch, while the other NICs I use for my Cisco lab. Trouble is, I don't seem to be able ping my Cisco gear without disabling the NIC that accesses the internet first. If I do a ping to a Cisco router for example, the little icon in the task tray for the internet NIC will flash, but not the one connected to the Cisco router, resulting in a timeout.

Any ideas on how I can force the ping through the right NIC without having the disable the other one all the time?

Thank in advance.

Ps I'm running XP pro.

lwwarner

duncnz wrote:

Any ideas on how I can force the ping through the right NIC without having the disable the other one all the time?

Ps I'm running XP pro.

Use a real operating system?

What does "ipconfig /all" say?

--Bill

forbesl

When you ping your Cisco devices, the icmp traffic is heading out to the internet. That's why you have to disconnect your internet connection in order to get that to work.

What you need to do is add a static route in XP at the command prompt to tell XP to have that traffic forwarded out the other NIC. You can make this route perisistent (it will remain if you have to shut off/reboot your XP machine).

Check this link out and it will talk you through it...

http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/sag_tcpip_pro_addstaticroute.mspx?mfr=true

duncnz

Thanks forbesl, that has worked perfectly!

lwwarner, I'm also running Suse 9.4 on this machine and Mac OSX 10.4 on another, but until I can swiftly and simply run all the programs I need on either of those two, I'll be sticking with XP for my CCNA studdies. Thanks anyway