Date: Tue, 26 Aug 2014 17:40:27 -0700 From: Peter Wemm <peter@wemm.org> To: freebsd-net@freebsd.org Cc: freebsd@jonathanprice.org Subject: Re: Should I be using ipv6_activate_all_interfaces or ip6addrctl_policy="ipv6_prefer" Message-ID: <2173103.SJdXL7NPLT@overcee.wemm.org> In-Reply-To: <88a42e1006e3fac7508a9419e342f1b2@mail.jonathanprice.org> References: <88a42e1006e3fac7508a9419e342f1b2@mail.jonathanprice.org>
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[-- Attachment #1 --] On Tuesday 26 August 2014 10:40:27 freebsd@jonathanprice.org wrote: > Hello, > > I am configuring a server with IPv4 and IPv6 addresses and have noticed that > FreeBSD seems to be preferring IPv4, such as when establishing SSH > connections. > > After reading through /etc/defaults/rc.conf, and later /etc/rc.d/ip6addrctl > I have come to the conclusion that I have two ways to tell FreeBSD to > prefer IPv6: > > 1) Add ipv6_activate_all_interfaces to /etc/rc.conf > 2) Add ip6addrctl_policy="ipv6_prefer" to /etc/rc.conf > > Could anybody with a little more knowledge on the matter explain to me which > of the two options is more preferential? They both do different things. The activate knob is to enable ipv6 on an interface. To oversimplify it, if you configure an address on an interface, it is "enabled". However, this switch enables this on all the rest of the interfaces, even the ones you didn't configure. ip6addrctl* affects things like hostname lookups to sort the addresses returned to the caller. They are different things entirely. I think you are expecting the behavior that ip6_prefer policy gives you. That's what we use in the freebsd.org cluster to have it use ipv6 where possible. -- Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com; KI6FJV UTF-8: for when a ' or ... just won\342\200\231t do\342\200\246 [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAABAgAGBQJT/Sj/AAoJEDXWlwnsgJ4ErZ0IAKqJz4CEMdURIooA25k1YV5e vDCVO/6zSnMG6i7NbbcEXDvxONnkIkd0v57yLAidx5KZjd5SezbGsJAoCas8GxOc jOKkdkwAAGeX4TkoroQRFIhaCY6f0AeR9ZIc/6Ei7a9yMHyqsNe8C60goTZy4yXX gLxB5Oob8JtGVYMasQpckBLwzXfWibhW8MFdDIEKxo3UsLhnS6wAQZWnOAfYQ6f0 dp9SudFLQr3SZR5sl7Vi1Ebc5f7aVG/aufNxPfVhOSOKa8PNgloKdFsb6adveuSL K/iALInwn0qFbKBadBARWmlZwaNExYXNLseA4dWW5ZbSRyYKRcjw2jZmpNiPhwQ= =+AgE -----END PGP SIGNATURE-----
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