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. Suggestions? Thanks! Chris |
are you pinging the hosts by ip address or by hostname?
are you using dhcp or static ip? |
I get the same results whether I ping by IP or hostname. All machines involved have static IPs.
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sounds like a DNS or hardware problem. Are you using Bind?
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This problem happens when using IPs only, so I don't think it's DNS related. (I haven't had any other DNS related problem with this machine). As far as being hardware related, I could easily be convinced that it is a quirk in the kernel driver for this particular NIC.
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who manufactured the NIC?
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From /proc/pci:
Intel Corp. 82544EI Gigabit Ethernet Controller (rev 2) Using the e1000 driver. I should point out a mistake I made in my original post. The server is a Dell PowerEdge 1650. |
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