Date: Fri, 08 Apr 2005 18:53:15 +0100 From: Mark Cullen <mark.cullen@dsl.pipex.com> To: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> Cc: freebsd-questions@freebsd.org Subject: Re: dhclient oddness? Message-ID: <4256C50B.5040803@dsl.pipex.com> In-Reply-To: <443bu2oh4c.fsf@be-well.ilk.org> References: <4252FFF1.507@dsl.pipex.com> <443bu2oh4c.fsf@be-well.ilk.org>
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Lowell Gilbert wrote: > Mark Cullen <mark.cullen@dsl.pipex.com> writes: > > >>Right, I have this weird annoying issue with my modem which I have >>finally got around to looking in to. Basically, it's all good and >>works fine (obviously, otherwise I wouldn't be here!), except when I >>reboot the internet computer the IP will change, the connection >>DOESN'T drop, but the IP does change. I have just now narrowed this >>down to some sort of problem with dhcp I think. >> >>The modem has a dhcpd server built in, which sends out the internet IP >>address to the computers network card. It seems, whenever the dhcp >>client, dhclient in this case, gets restarted it'll get the old ip >>address (the first chunk of the quote below, before the <freeze>), >>natd will update itself, but then the connection will just stall until >>dhclient does the next DHCPREQUEST thing (47 seconds in this case?) >>.. then the modem sends back a DHCPNAK and I get a different IP >>address. Any ideas why this might be happening? > > > Your "modem" is clearly the source of the problem, and it seems > unlikely that anything on the FreeBSD side could help, aside from > maybe forcing a lease free before starting dhclient on startup. > > I'd try looking at the configuration for that "modem" device, or > possibly for a firmware upgrade for it. > Hi, Could you explain what's going on to me? I mean, in simplified terms, what exactly is causing the modem to get a new IP address when dhclient restarts? I have contacted them about the issue and they seem to think it's an O/S problem (well, it's *obviously* not an issue with their modem now, is it? :-P). How would I go about forcing a 'lease free'? Delete dhclient.leases, or some option somewhere that I missed? As for configuration, there's no config for the DHCP server and there's never been a firmware upgrade for it (this is the only issue I have EVER had with it and I expect most users don't notice it). Thanks
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