Freebsd failed to create routing prefix

[Hiroki Sato]

Rommel Laranjo <rslaranjo at gmail.com> wrote
  in <f051005f0905031731t6cde557l5251caf2ec24f41f at mail.gmail.com>:

rs> Yes, my box has two NICs and I have these lines at my rc.conf.
rs>
rs> ipv6_enable="YES"
rs> ipv6_network_interfaces="AUTO"

 Ah, from 7.1R there seems a regression of handling IPv6 link-level
 route on a system with multiple NICs and receiving RAs.  When one NIC
 received an RA, another NIC's link-level route (i.e. marked as UC
 flag in netstat -r) is removed for some reason and it does not work
 even if the route is manually added after the removal (btw, you can
 add the route by using "route add -inet6
 2001:db8:1234:abcd:20c:27ff:fe3d:63dd/64 -interface em0 -cloning
 -nostatic").

 Your procedure looks correct to me and it should work on 7.0R, but on
 both 7.1R and 7.2R it does not work at least.  While I still have no
 idea about a workaround to this symptom at this moment, I think it
 will be fixed soon in the source tree.

--
| Hiroki SATO
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