I've got a bit of a weird situation I think -- running Ubuntu 9.04
I've got a dev machine where we've set up multihoming via this in the interfaces file:
iface eth0:1 inet static
so that we can have multiple https hosts.
When we first set this up, other machines on our corporate network could not see ping the 10.0.2.22 address, even though they could ping the main address for this machine. (they get this error: 92 bytes from 10.5.0.1: Destination Host Unreachable)
after executing this command:
route add -host 18.104.22.168 dev eth0:1
other machines on the network could then ping the 10.0.2.22 address just fine.
I concluded that there was an arp problem, and so I set up a periodic ping in case the arp cache got flushed (I did this after it got flushed one time, and we lost connectivity again).
This all seems like a huge hack to me, with the right solution being to modify the 10.5.0.1 arp settings or something (although it seems like it is probably generally set up dynamically).
recently the network architecture at my work changed (I don't have any control over that, I just need my server to work), and now my ping solution isn't working -- any ideas?