Date: Mon, 09 Feb 2015 11:34:02 -0500 From: Daniel Corbe <corbe@corbe.net> To: freebsd-net@freebsd.org Subject: ifconfig greX create disables IPv6 forwarding Message-ID: <87h9uvjb7p.fsf@corbe.net>
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For some reason, every time I create a GRE interface on a FreeBSD IPv6 gateway, net.inet6.ip6.forwarding is disabled. As long as I manually re-enable it with sysctl, both the GRE tunnel and the IPv6 network behind this machine will continue to work; however, it's certainly far from ideal. There's nothing in the log to indicate exactly what's going on here: Feb 9 11:23:08 router rtadvd[27251]: interface added (idx=8) Feb 9 11:23:08 router devd: Executing '/etc/pccard_ether gre0 start' Feb 9 11:23:21 router rtadvd[27251]: non-zero lifetime RA but net.inet6.ip6.forwarding=0. Ignored. Feb 9 11:23:53 router last message repeated 2 times Nor is there anything about it in dmesg. # uname -a FreeBSD router.corbe.net 10.1-RELEASE FreeBSD 10.1-RELEASE #0 r274401: Tue Nov 11 21:02:49 UTC 2014 root@releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC amd64 -DAniel
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