Date: Wed, 13 Mar 2013 12:52:21 +0000 From: Schrodinger <schrodinger@konundrum.org> To: freebsd-net@freebsd.org Subject: Re: ipv6 default router Operation not permitted Message-ID: <20130313125221.GD17859@defiant.konundrum.org> In-Reply-To: <201303131227.57751.Mark.Martinec%2Bfreebsd@ijs.si> References: <20130312225018.GA13589@defiant.konundrum.org> <3ABB5AED-DEA9-42F6-82A1-FEA9E8BBBDCF@my.gd> <20130313091727.GA17859@defiant.konundrum.org> <201303131227.57751.Mark.Martinec%2Bfreebsd@ijs.si>
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--EY/WZ/HvNxOox07X Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2013/03/13 12:27, Mark Martinec wrote: Hi Mark, > On Wednesday March 13 2013 10:17:27 Schrodinger wrote: > > ifconfig_re0_ipv6=3D"inet6 2001:41D0:2:E7c4::1 prefixlen 64" > > [...] > > Voodoo, indeed... I'm sure there's a /48 used somewhere but to be more > > specific, or rather obvious, my default gateway resides at the boundary > > of a /56 - 2001:41D0:2:E700::/56 >=20 > Having multiple IPv6 subnets on the same wire is asking for trouble. >=20 This isn't my network so I don't have any input into the matter. This is the OVH configuration for their dedicated servers, at least in my product range. > For example, I believe an ICMP redirect still (in 9.1) does not create > a temporary route: > http://www.freebsd.org/cgi/query-pr.cgi?pr=3D152791 > which beat us hard time (random unreachability between hosts), > having to rearrange that legacy segment which happened to have > two subnets on the same wire. >=20 > The static routes destinations must be directly reachable (on-link). >=20 Does adding the interface route not put the default gateway on-link though ? > Either use a single /56 for the whole LAN, adjusting the prefix > length on each interface, or provide a router within each subnet. >=20 If I am to change my prefix length to /56 this means that anyone else in that /56 who is configured with a prefix length of 64 will be routing to me and I will be swicthing to them.... This could cause problems. > Doing otherwise (like using static ndp/arp entries) is just a hack. >=20 Agreed, I had no intention of fixing the problem this way. C. --=20 +---------------------------------------------------------------+ Quidquid latine dictum sit, altum sonatur. MSN: schro5@hotmail.com ICQ: 112562229 GPG: http://www.konundrum.org/schro.asc --EY/WZ/HvNxOox07X Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iQIcBAEBCgAGBQJRQHaEAAoJEBBi7cjNKnTjCPcP/3lK8deK5uDWtc4ruDKs8k2e Jaxk1IibNiU4WjuwxGqkoBQ0NpShLw6WdGHsnzXnicCigEmokunGZZnfYHzWt7wZ BGRhZgw2aSyRZi2mjzhiFq+7ZVGn928x+/h1F+csYJ/ynkVjpLK4BLQiPwJWQCZa LeQfUtw4pnW479fzZq0WVAuPGNVxntqPvgyVtA3FHN+PQmrlxQI9sJkKROopIvGq Kqf2+8R1KV64ZtffVRMGKFqGVPdR/otPjarBa1lstFk9lVeGxKDY+y7GKHfva8d8 JQMRCgyb86T08LpTRXSO2UfsDWd4VfKbZx+Un+QDvLmP1FHg9ZX7zAaK+lqNvAly Cw/tSLQcd5103OOCbvKsX1VUz6wmqQd+bTmMqwgTg/hM2durNvC4g/103E6SLs7q qTMxrlMfQS3Reimp3ZvlSMXsV+6EhSD8h05hohx9TE1Zm7wIMV1urFQYkra/a0JD GDyZfaR511fq7DPYLzMTmX6UkUa1YbUDt7Fr7Q71cXLeo0QSB7TNpGmJR1jdopN5 IMtBt5bDBb4NeUSQXbVE7BGPXUEJJMSwGUyEGeqOUIO73hTyCgcvaZLnTNtTg/0X ma/gzVMm6AMwwKOODyIY3Xww4ddCp3WeSE84RfgZRltdVwUVfvDOp5RuXxw4frAm sNrV3fSlQQmSZ4g6rdYg =gec9 -----END PGP SIGNATURE----- --EY/WZ/HvNxOox07X--
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