Date: Tue, 19 Jan 2010 09:25:04 -0500 From: David Horn <dhorn2000@gmail.com> To: Fernando Gont <fernando@gont.com.ar> Cc: freebsd-net@freebsd.org Subject: Re: Processing IPv6 Router Advertisements Message-ID: <25ff90d61001190625m224c0aaco83ff65a1a28f28d0@mail.gmail.com> In-Reply-To: <4B559EBC.9060502@gont.com.ar> References: <4B559EBC.9060502@gont.com.ar>
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On Tue, Jan 19, 2010 at 6:59 AM, Fernando Gont <fernando@gont.com.ar> wrote: > Hello, folks, > > I'm running FreeBSD 6.2-Release in one of my boxes, and there seems to > be a bug in the processing of Router Advertisement messages. > > RA messages seem to be required to have a Source Address in the > fe80::/32 prefix, rather than in the fe80::/10 prefix. That is, the > first 32 bits of the IPv6 Source address must be fe80:0000, or else the > message is dropped (at least, no changes are made to the destination > cache or the neighbor cache). > > Can anybody confirm this one, or correct me if I am wrong? A cursory look at the netinet6/nd6_rtr.c code looks like it is using IN6_IS_ADDR_LINKLOCAL from netinet6/in6.h which should be smart enough to just look at fe80::/10. Try setting net.inet6.icmp6.nd6_debug=1 in /etc/sysctl.conf and reboot to see if there is anything interesting coming out of debug logging. (will show in dmesg and /var/log/messages) Out of curiousity, what device is using a non EUI-64 for link-local, or is this a manually configured link-local situation ? Good Luck. ---Dave Horn
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