ifconfig greX create disables IPv6 forwarding
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 r...@releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC amd64 -DAniel ___ 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
Re: ifconfig greX create disables IPv6 forwarding
On 09/02/2015 16:34, Daniel Corbe wrote: 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. I stumbled acro I discovered this in January. See this thread: http://lists.freebsd.org/pipermail/freebsd-net/2015-January/040797.html Are you enabling forwarding using ipv6_gateway_enable in rc.conf, or are you just setting net.inet6.ip6.forwarding to 1 in sysctl.conf? devd gets involved running /etc/rc.d/netif start and that seems to check (and set) the forwarding sysctls based on the rc.conf entries - so if you've set them manually they get reset when a new interface is brought up. Adding ipv6_gateway_enable=YES in /etc/rc.conf should fix this. Paul. ___ 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
Re: ifconfig greX create disables IPv6 forwarding
Paul Thornton p...@prt.org writes: On 09/02/2015 16:34, Daniel Corbe wrote: 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. I stumbled acro I discovered this in January. See this thread: http://lists.freebsd.org/pipermail/freebsd-net/2015-January/040797.html Are you enabling forwarding using ipv6_gateway_enable in rc.conf, or are you just setting net.inet6.ip6.forwarding to 1 in sysctl.conf? devd gets involved running /etc/rc.d/netif start and that seems to check (and set) the forwarding sysctls based on the rc.conf entries - so if you've set them manually they get reset when a new interface is brought up. Adding ipv6_gateway_enable=YES in /etc/rc.conf should fix this. Embarrassingly enough, the problem wound up being I had ipv6_enable_gateway instead of ipv6_gateway_enable. I'm also setting net.inet6.ip6.forwarding=1 manually in sysctl.conf so that's sort of why it ever worked to begin with. Thanks though. Some times all you need is a second set of eyes on a problem. -Daniel ___ 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
