On Mon, Sep 11, 2017 at 04:42:37PM -0600, Roy Bixler wrote: > On a NetBSD 7.1 system, after a network upgrade by the administrator > (not me), I see frequent messages in /var/log/messages like this: > > dhcpcd[nnnn]: ab0: changing default route via fe80::xxx:xxxx:xxxx:xxxx > dhcpcd[nnnn]: ab0: fe80::xxx:xxxx:xxxx:xxxx: router expired > > I believe that the administrator set up the network with 2 routers > which are both active and advertising routes. I'm seeing the result, > which looks like route flap. I have a Linux system available and I > don't see the same thing with it. It configures multiple default IPv6 > gateways on the same interface and just hums along. Can NetBSD do the > same thing? Except for the log spam, the NetBSD system works fine > with this router setup and IPv6. I can just ignore the log spam, but > is there a better approach?
Update: something changed on the network and I'm not getting the syslog spam anymore. The only evidence of the change I have is an "arp info overwritten" message for the IPv4 default router. So, I suppose that the syslog spam might have been showing a real problem in the router configuration. Whatever it was, I still see multiple default gateways for IPv6 in Linux, so I still have a question about that. -- Roy Bixler <rcbix...@nyx.net> "The fundamental principle of science, the definition almost, is this: the sole test of the validity of any idea is experiment." -- Richard P. Feynman