Date: Fri, 12 Aug 2011 11:46:34 +0800 From: dave jones <s.dave.jones@gmail.com> To: "Christopher J. Ruwe" <cjr@cruwe.de> Cc: freebsd-questions@freebsd.org Subject: Re: How to get ip address automatically from different dhcp server Message-ID: <CANf5e8bHvznRJmZ=j0T3gJ3jdf3=piUdCNSOvQx4DgQ-ukYJTA@mail.gmail.com> In-Reply-To: <20110727223034.0c0f0c8d@dijkstra> References: <CANf5e8ZtkdWZhM6f=MeWv6%2BmNJOZ75jjox28Ss7L9RWpGNG3=g@mail.gmail.com> <20110727223034.0c0f0c8d@dijkstra>
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Hi Christopher, Thanks for your solution. It does help a lot, but there's one problem. For example, DHCP server is not started for some reason and my computer's ethernet cable is plugged. Once dhcp server started, I can't get the IP unl= ess I unplug and then plug the ethernet cable. Do you know how to solve this issue? Thank you. Regards, Dave. On Thu, Jul 28, 2011 at 4:30 AM, Christopher J. Ruwe wrote: > On Wed, 27 Jul 2011 10:49:42 +0800 > dave jones <s.dave.jones@gmail.com> wrote: > >> Hi, >> >> I cat get an IP address from dhcp server by adding the line >> in /etc/rc.conf: >> >> ifconfig_em0=3D"DHCP" >> >> If I move my laptop to another place, I have to manually run >> "dhclient em0" to get an IP. Otherwise, it won't get an IP >> automatically. >> >> My question is it's possible to get ip address automatically from >> different dhcp server? thanks. >> >> Regards, >> Dave. >> _______________________________________________ >> freebsd-questions@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to >> "freebsd-questions-unsubscribe@freebsd.org" > > Have a look at /etc/devd.conf. Mine include a portion > > # > # Try to start dhclient on Ethernet like interfaces when the link comes > # up. =A0Only devices that are configured to support DHCP will actually > # run it. =A0No link down rule exists because dhclient automaticly exits > # when the link goes down. > # > notify 0 { > =A0 =A0 =A0 =A0match "system" =A0 =A0 =A0 =A0 =A0"IFNET"; > =A0 =A0 =A0 =A0match "type" =A0 =A0 =A0 =A0 =A0 =A0"LINK_UP"; > =A0 =A0 =A0 =A0media-type =A0 =A0 =A0 =A0 =A0 =A0 =A0"ethernet"; > =A0 =A0 =A0 =A0action "/etc/rc.d/dhclient quietstart $subsystem"; > }; > # > notify 0 { > =A0 =A0 =A0 =A0match "system" =A0 =A0 =A0 =A0 =A0"IFNET"; > =A0 =A0 =A0 =A0match "type" =A0 =A0 =A0 =A0 =A0 =A0"LINK_DOWN"; > =A0 =A0 =A0 =A0media-type =A0 =A0 =A0 =A0 =A0 =A0 =A0"ethernet"; > =A0 =A0 =A0 =A0action "/etc/rc.d/dhclient quietstop $subsystem ; ifconfig= $subsystem inet 0.0.0.0"; > }; > > I am under the impression that this rule does what you want to do. > > Cheers, > -- > Christopher J. Ruwe > TZ GMT + 2 >
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