On Wed, Jun 27, 2012 at 3:09 PM, Dan Williams <d...@redhat.com> wrote:
> On Tue, 2012-06-26 at 11:34 -0600, Chengyu Fan wrote: > > Hi~ > > I want to assign some job to my DHCP client (not just configure the > > network interface). Ex: I let my DHCP client request some private > > options(224-254), if I get those options another program should run, > > otherwise just do the regular IP configuration. > > > > > > But the DHCP client is under the control of NetworkManager. Does > > anyone know that if there is a way to pass a new script to the DHCP > > client in the NetworkManager? Or if I can configure the NetworkManager > > to create a new script? > > If you have interface-specific options and you're on Fedora, you can put > those options into interface config files, eg /etc/dhclient-eth0.conf > or /etc/dhcp/dhclient-eth0.conf. The other distros, for whatever > reason, don't have interface-specific config files by tradition, so you > all your interfaces have to share the config for your specific options. > That goes in /etc/dhcp/dhclient.conf (Debian, Gentoo) > or /etc/dhclient.conf (SUSE). > > NM reads this file and copies its contents to the actual config file it > sends to dhclient. So feel free to drop your custom 'also request' > stuff and custom 'option' formats there, and NM will use them. > > NM will call various scripts called "dispatcher" scripts on network > events, like network up and network down. So if you'd like your script > to run when the network is ready (IP addressing complete) you can do > that, and you'll also get all your DHCP options including the private > ones in the script's environment. See 'man NetworkManager' for that. > Thanks for your answer. I think this is what I need. One more question: In DHCP, it is the "script-file" ( which is specified by -sf) to get the parameters and commit the actual configuration. I'd like to run my script or program after the network is ready, but how can I get the new DHCP options in "dispatcher"? Ex: $new_domain_name, $new_ip_address, et al. Thanks, > > Does that do what you need it to? > > Dan > > -- Regards, Chengyu Fan
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