I'm having difficulty getting some IP addresses recognized. I have a
subnet of 16 registered addresses, let's call it xxx.xxx.xxx.0 to
I have a box set up right now with xxx.xxx.xxx.2, 3, and 4 all on eth0
(each with a web site), using xxx.xxx.xxx.1 as the gateway. Works a
treat, and has been working this way for almost a year.
I've got a new machine with RH 6.1. Thee NICs, xxx.xxx.xxx.13
(connects to the gateway), xxx.xxx.xxx.14 (connects to a dmz) and one
with a local address. I plug in the new box and I can ping the 13 & 14
addresses from the web no problem. But even though I add xxx.xxx.xxx.2
to the first nic I'm unable to ping that address, except on the local
network where it works fine. (the old box has been disconnected
entirely - there's no ip address conflict).
From what I can gather a router somewhere upstream of me is
supposed to periodically broadcast an ARP request to my subnet. I'm
trying to find out from my ISP if this is the case, and if so how
often. I tried adding an ARP entry for xxx.xxx.xxx.2 on that nic but it
didn't seem to make any difference. I understand I'd also have to do
this for any machines I want to add on the local subnet, but right now
I can't even get a single box to work correctly.
Am I on the right track? I'd appreciate any help at all. Thanks.