I am curious if you've got anywhere with this? I just saw kernel commit e0056593b61253f1a8a9941dacda22e73b963cdc ip_tunnel: fix ip_tunnel_lookup
and thought that might have been an issue somewhat related. On Wed, Jul 16, 2014 at 6:00 PM, Matthieu Boutier < [email protected]> wrote: > Hi, > > we are investigating some strange behaviour with "native" source specific > routes (i.e. not with multiple routing tables): it seems cached routes may > make things go wrong. Here are the details. > > I have two default routes: > > default from 2001:41d0:1:f100::/56 via fe80::4e72:b9ff:fe43:7608 dev > tun-ariane proto 42 metric 1024 > default via fe80::8618:8803:5474:9b01 dev eth1 proto zebra metric 3 > > and I try to use mtr with two different addresses: > > (1) mtr 2a00:1450:4007:804::1006 --address > 2001:660:3301:9208:e246:9aff:fe4e:912e > (2) mtr 2a00:1450:4007:804::1006 --address > 2001:41d0:1:f19f:e246:9aff:fe4e:912e > > When 1 is run first, the following route is added to the cache, and then, > when 2 is launched, the wrong path is taken since the cache match. > > 2a00:1450:4007:804::1006 via fe80::8618:8803:5474:9b01 dev eth1 > metric 0 > > When 2 is run first, the following two entries are in the cache, and > things goes right (at least while the cache keeps the specific route). > > 2a00:1450:4007:804::1006 from 2001:41d0:1:f100::/56 via > fe80::4e72:b9ff:fe43:7608 dev tun-ariane metric 0 > 2a00:1450:4007:804::1006 via fe80::8618:8803:5474:9b01 dev eth1 > metric 0 > > > This has been done on an openwrt 3.10.36 and on a Debian 3.13.7. This > behaviour was not observed with the same route entries added by hand with a > /128 destination, i.e. > > 2a00:1450:4007:804::1006 from 2001:41d0:1:f100::/56 via > fe80::4e72:b9ff:fe43:7608 dev tun-ariane > 2a00:1450:4007:804::1006 via fe80::8618:8803:5474:9b01 dev eth1 > > The packets are well routed when multiple routing tables are used. > > Does anyone has some feedback about this ? > > Matthieu > > -- Dave Täht NSFW: https://w2.eff.org/Censorship/Internet_censorship_bills/russell_0296_indecent.article
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