Ping continues to fail after remote host recovers
Ok, here is a real puzzler. I have a Compaq DL360 running RedHat 9, kernel 2.4.20, which I use as a network monitor. I am constantly pinging several remote hosts.
If one of the remote hosts goes down, obiviously I start getting destination host unreachable messages from the ping command. However, once the remote computer comes back up, I CONTINUE to get destination host unreachable for that computer. In fact, ping will continue to fail unless I do a network stack restart, or reboot the linux box.
I was having this same problem when running RedHat 7.3, and thought maybe upgrading would help, but it did not.