<snip> >Unless the IP addresses are munged it looks like you have both >interfaces in the same subnet. Assuming that is the case for the moment >they probably would use the same default route and when one interface is >shutdown it removes what it believes is its default route which happens >to be the same route for the other interface. > >What is it you are trying to do? I believe there are tools available to >bond the two interfaces together (assuming you have switches capable of >handling that). I don't want to bond the nics. I need to have multiple ip addresses up on this box, I want to bind one to eth0 and many to eth1. >A little more information on your network design may be helpful. And >why do you want to manually bounce the interfaces? I don't want too manually bounce the interfaces, in troubleshooting of another issue I took down eth1 and noticed the behavior. This might be normal, but I'm curious if it should do this. Thanks, Dave