Very strange, multiple IP addresses on the same Ethernet card donot route properly
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From: Ignoramus27261 on 10 Jan 2010 18:36 I have a small IP subnet to myself (16 IP addresses, actually 13 after subtracting router .1, .0, and broadcast .15). I used to have an old Fedora server that used to serve almost the whole subnet. Always worked great, I had eth0:1 ... etho:11 or so addresses and all worked. I am omving to a new Ubuntu server (Ubuntu Hardy). If I delete an interface on the old server, and create it (with the same ifconfig command as on Fedora) on Ubuntu, the IP address is created. It is also visible from the subnet, as in, I can telnet to this IP:80 from the old server (and get results clearly indicate that it is properly on the new server). However, the IP, if hosted on the new server, is not reachable from outside of the subnet. The only difference in routing that I see between the old and new server, is "Metric". (the 10.0.0.0 route is a leftover from when the server was set up on my home network). The old server network card s eth0 and the new one is eth1. OLD::~==>/sbin/route -n |grep -v ' lo' Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 65.182.171.160 0.0.0.0 255.255.255.240 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 10.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 eth1 0.0.0.0 65.182.171.161 0.0.0.0 UG 0 0 0 eth0 NEW::~==>route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 65.182.171.160 0.0.0.0 255.255.255.240 U 0 0 0 eth1 0.0.0.0 65.182.171.161 0.0.0.0 UG 100 0 0 eth1 So, why is the new server not routing properly, is what puzzles me at the moment. I tried both ifconfig, as well as /etc/network/interfaces, it makes no difference). i |