IP Address Problems

[Mike Bird]

On Tue, 2006-01-10 at 14:18, Andrew Jorgensen wrote:
> As others have mentioned this could contribute to the problem, but
> looking at it again (and looking at the DHCP RFCs) I think dhclient is
> not operating as it should.  According the the dhclient man page it
> doesn't release the lease unless you explicitly ask it to using
> omshell (or the omapi interface).  If it hasn't released the lease
> then it should request the address it had the last time it was run
> (including across reboots).  It looks, based on what you've said, like
> it isn't doing that.
> 
> Unfortunately, because you're spoofing between two boxes, the behavior
> isn't defined.  You may be confusing the poor server (that's what
> you're trying to do!).

The OP shouldn't need to worry about that.  DHCP servers can work
with Windoze clients which are always blue-screening and crashing
and rebooting without releasing leases.  When the client reboots
and asks for an IP, the DHCP server gives the lease already
associated with that MAC address.  If it didn't the server would
run out of IP addresses in no time.

The OP needs to find out whether his ISP is seeing requests from
different MAC addresses or the same MAC address.  If different
MAC addresses then the OP needs to fix his scripts.  If the same
MAC address then the ISP needs to figure out why its DHCP server
is borked.

--Mike Bird