On 1/12/2010 7:42 PM, David Horn wrote: > On Tue, Jan 12, 2010 at 4:36 PM, Brett Lee <brett....@sun.com> wrote: >> Hello, >> >> Using FreeBSD 8.0-RELEASE, and am trying variations in /etc/rc.conf in an >> attempt to enable IPv6 on ONLY one of the systems two interfaces. >> >> Specifically, em0 should be enabled IPv4 DHCP, and bge0 should be enabled >> IPv6 only. >> >> From the KAME link below, and the files /etc/network.subr and >> /etc/defaults/rc.conf, am reading that "ipv6_network_interface" should work; >> however the following still results in em0 obtaining IPv6 addresses: >> >> http://www.kame.net/~suz/freebsd-ipv6-config-guide.txt >> >> ifconfig_em0="DHCP" >> ipv6_enable="YES" >> ipv6_network_interface="bge0" >> ipv6_network_interfaces="bge0" >> >> In another attempt (see link below), it looks like "ifconfig_em0" may >> support a "NOIPV6" param, but in practice it doesn't seem to work for me: >> >> http://lists.freebsd.org/pipermail/freebsd-rc/2007-May/001106.html >> >> ifconfig_em0="DHCP NOIPV6" >> ipv6_enable="YES" >> #ipv6_network_interface="bge0" >> #ipv6_network_interfaces="bge0" >> >> Am hopeful that someone might point out how I could enable this >> configuration. >> >> Thanks in advance! -Brett > > NOIPV6 is not a valid rc.conf configuration token at this time. > > I am assuming that you are using SLAAC for IPv6 prefix/address > distribution (via rtadvd/radvd), and not DHCPv6. > > ipv6_network_interfaces is the correct rc.conf(5) variable to use to > specifically control which interface gets configured using SLAAC via > rtsol(8), but will not stop other interfaces from getting the RA > (Router Advertisement) packet which starts IPv6 SLAAC (Stateless > Autoconfiguration). > > In -current/9.0 there are nice new ifconfig parameters (inet6 > ifdisabled -nud -accept_rtadv) and rc.conf variables that do just what > you are looking for, but they are not in 8.0 at this time. > > In 8.0 you can use the ndp(8) utility to set the -accept_rtadv (and/or > ifdisabled/nud,etc.) flags on a per-interface basis. The > "-accept_rtadv" flag will disable SLAAC for the specified interface, > but must be called before the interface gets the "RA" packet to be > effective. > > You can do an ugly *unsupported hack* in 8.0 to call ndp from within > rc.conf/rc.d startup scripts until the new code makes it into a > release: > > ipv6_enable="YES" > ipv6_network_interfaces="bge0" > ifconfig_em0="DHCP `ndp -i em0 ifdisabled -nud -accept_rtadv >/dev/null 2>&1`" > ifconfig_bge0="UP" > > This will cause some boot-time error messages about not finding ndp > (before /usr is mounted), but these can be ignored, as the backticked > ndp line will be run EVERY time that rc.conf is sourced. This is > just a work-around for 8.0 that happened to work for me at the time. > If someone else has a better solution that fits properly within the > confines of rc.conf, please speak up. >
Not sure if 8.0 still has this cap but you could put you interface commands in /etc/start_if.em0 /etc/start_if.bge0. If this works out let me know I would be interested since it seems like a better idea rather than trying to set some weird options inside some rcvars. > While on the subject, I have been thinking about putting together a > patchset to experiment with adding some improved logic surrounding > using DHCPv6 vs DHPCPv4 vs SLAAC/RTSOL in the rc.conf scripts and > adding M+0 flag support +rdnss (RFC 5006) support to the kernel and > userland and devd. If I can ever get a working prototype, I will > share to get some feedback. > -- jhell _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
