If You'd have said " supersede dhcp-lease-time 7200" to the dhclient.conf, it would be A
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dhclient, refresh ip address before lease timeout
I have this ISP provider which changes the dynamic IP in random periods. At random moment ISP reconfigures it's dhcp-server/firewall/route
My linux box is cut off from the world instantly. It should renew the IP, unfortunately the lease time haven't expired yet - so it's waiting.
I heard, that ISPs router is supposed to send some notification that ip is invalid in reply to my outgoing packets with old source ip set.
And maybe it does, maybe not.
I wanted make sure though, that my linux is not blocking those notifications and uses them to force IP refresh.
Anybody knows what firewall rules should be applied to pass those notifications?
Anybody known what extra kernel/net/dhclient configuration should I add to make it works?
I'm running fedora box.
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by: gheistPosted on 2009-03-26 at 11:58:07ID: 23993926
This is infrastructure problem. You can mitigate it by adding short lease time to dhclient.conf.
Normal operation does not provide means of accomodating lease loss without notice.
Different provider is really good solution....