On Mon, 2003-08-25 at 06:24, Jason Dixon wrote: > On Sun, 2003-08-24 at 23:35, Rodolfo J. Paiz wrote: > > At 8/24/2003 19:48 -0700, you wrote: > > >Question, i have a server that i would like to use > > >two nics. i have two ips that are on the same subnet > > >and they both have the same default route. > > > > > >how do i tell traffic that comes to one ip that is assigned > > >to eth0 to go back through eth0 and one ip that is assigned > > >to eth1 to go back trhoug eth1 when it goes back out to the > > >net ? > > > > I'm no expert, but... AFAIK, you don't. AFAIK, you can't. > > > > You can only have one default route, and that route points to one > > interface. Most people try to have two Ethernet cards on the same subnet so > > they can get double the bandwidth, but it simply does not work. If you want > > double the bandwidth, bond the two interfaces or aggregate them so they act > > like a single one. If you want to offer some services on one IP and other > > services on the other IP, realize that you're going to have to find some > > other way. > > Yeah, it's called an alias. You're right, you can't (AFAIK) have two > interfaces with the same default gateway. If they want to bond the two > NICs, great. But the only way (IIRC) to get multiple IPs working on the > same segment is to use aliases (which are easier anyway).
Let's clear a few things up. Aliases are on the same NIC, not across multiple NICs unless you are bonding. Yes you can have two NICs on the same subnet with the same gateway. Without getting in to the guts of packets and how they work, the packet itself will "know" how to get back out home. Using a basic default route, having no other routing on the machine, all packets will go back out the interface it came in. We do this on countless hosting machines on our network. Rik Thomas www.valuablehost.com -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED] https://www.redhat.com/mailman/listinfo/redhat-list
