I just upgraded from FC4 to FC5 and I'm having a problem getting multiple ip addresses to work on the same card. It's a very odd problem. I think it has something to do with routing and the gateway because the 2nd ip address works inside the same subnet, but when it's confronted with a packet to send outside the subnet, it chockes. For instance I can ping it inside the subnet, but not outside.
Here are my config files. Ip addresses are not correct, but show what's going on.
ifcfg-eth0
# VIA Technologies, Inc. VT6102 [Rhine-II]
DEVICE=eth0
BOOTPROTO=none
GATEWAY=72.2.162.25
HWADDR=00:30:18:A1:92:A5
IPADDR=72.2.162.26
NETMASK=255.255.255.248
ONBOOT=yes
TYPE=Ethernet
USERCTL=no
IPV6INIT=no
PEERDNS=yes
ifcfg-eth0:1
# Please read /usr/share/doc/initscripts-*/sysconfig.txt
# for the documentation of these parameters.
GATEWAY=72.2.162.25
TYPE=Ethernet
DEVICE=eth0:0
HWADDR=00:30:18:a1:92:a5
BOOTPROTO=none
NETMASK=255.255.255.248
IPADDR=72.2.162.27
USERCTL=no
IPV6INIT=no
ONPARENT=yes
PEERDNS=yes