Date: Thu, 15 Mar 2012 20:49:55 -0400 From: "Eric W. Bates" <ericx@ericx.net> To: freebsd-net@freebsd.org Subject: Re: Use of network_interfaces in rc.conf Message-ID: <4F628E33.1060303@ericx.net> In-Reply-To: <CAN6yY1vwN2vYjSU4%2BHbOiTKPPA2UArYd7Ex1J43q9OZMxXkxkw@mail.gmail.com> References: <CALCpEUE5-HgupRc9VfU4W2B4d07mO9ceTiX05SfQCeA_GXDcOQ@mail.gmail.com> <CALCpEUFs74jZ69gCm-1bwGMKZFdkBas2VdR8x1JHAVzFtWSpBA@mail.gmail.com> <D3ACECC5-598B-4679-A76F-7FDD2780BAFF@mac.com> <CALCpEUHywOyDqabNkuRhmZE0o2iCMWTyt%2BAW5GXEu7HdZRgrwg@mail.gmail.com> <4F607EDF.4010505@rdtc.ru> <CALCpEUG1fOA687BiYOre-7ou1k-zKs0iLYmk2dDJVt5JwhTJEQ@mail.gmail.com> <4F61769B.2040809@rdtc.ru> <CAN6yY1vwN2vYjSU4%2BHbOiTKPPA2UArYd7Ex1J43q9OZMxXkxkw@mail.gmail.com>
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On 3/15/2012 7:27 PM, Kevin Oberman wrote: > 2012/3/14 Eugene Grosbein<egrosbein@rdtc.ru>: >> 15.03.2012 06:33, hiren panchasara пишет: >> >>> network_interfaces is basically historic rudiment >>> used in 2.2.x FreeBSD version and alike. >>> >>> In general, you should not use it in modern version at all. >>> >>> >>> Thanks Eugene. >>> >>> So, the only way to specify boottime configuration (that survives reboots) for an interface in rc.conf is: >>> ifconfig_em0="dhcp" ? >> >> Yes, thats what man rc.conf says. > > Minor correction, but the man page says 'ifconfig_em0="DHCP". It may > not be case sensitive, but I have always uded CAPS like the man page > specifies. Also, I usually end up specifying SYNCDHCP to avoid having > something else that requires network starting before the interface is > configured. > > Of course, ifconfig_* may have any valid ifconfig argument in it, but > remember the rc.conf is shell, so you must put all of the definition > in a single statement. You can't do: > ifconfig_em0="DHCP" > ifconfig_em0="mediaopt half-duplex" > That will not do DHCP, so hte interface will not come up. Of course, > you can concatinate a second entry to the first using normal sh > syntax. FreeBSD rc has a clever way around this. In /etc/network.subr ifscript_up(), if the file /etc/start_if.em0 is readable, it will be dot executed. So you can put as much multi-line config info in there as you would like. e.g.: ifconfig em0 mediaopt half-duplex dhclient em0 As long as network_interfaces includes em0 (and it will be automatically included by default), then start_if.em0 will be run. Conversely, stop_if.em0 will also run when rc runs at shutdown.
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