Date: Thu, 7 Jun 2012 17:56:32 -0500 (CDT)
From: Robert Bonomi <bonomi@mail.r-bonomi.com>
To: bruce@cran.org.uk, freebsd-questions@freebsd.org
Subject: Re: Configuration problem with IPv6 router ("cannot forward src")
Message-ID: <201206072256.q57MuWXC058337@mail.r-bonomi.com>
In-Reply-To: <4FD12CFF.6020205@cran.org.uk>
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> From: Bruce Cran <bruce@cran.org.uk> > > I'm trying to set up a IPv6 router (running -current) on my home > network. My ISP gives me a /128 via PPP and I have a /48 allocation, > which I use to give em0 and tun0 public addresses in different subnets > (tun0 is assigned the address via ppp.linkup). > I've added all the IPv6 settings to rc.conf (ipv6_gateway_enable, > ipv6_network_interfaces, rtadvd_enable etc.) and I can ping IPv6 sites > from the router. > > The problem is that rtadvd continues advertising the default gateway as > tun0's link-local address - and pinging from a machine on the network > results in "cannot forward src" messages on the router (strangely, > despite hisaddr being fe80::205:... in ppp.log, the kernel logs the > address as fe80:f::205:...). > > Is there some extra configuration I've likely missed that's needed when > using IPv6 via PPP? Please provide the output from these two commands: ifconfig -a netstat -nr on both the router and on an 'inside' machine. (identifying which is which :) There is also a question of 'where' the /48 comes from -- and how traffic to those addresses is being routed from the outside world.
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