Re: IPv6 routing question

[Andy Ruhl <acruhl%gmail.com@localhost>]

On Fri, Oct 9, 2026 at 3:24 PM Ted Spradley
<tsprad%talent-free-studios.com@localhost> wrote:
>
> I just noticed this in my /var/log/messages:
>
> Oct  9 20:57:35 set dhcpcd[1193]: wm0: changing route to
> fdc7:8cef:197:1::/64 Oct  9 20:57:35 set dhcpcd[1193]: wm0: expired
> route fdc7:8cef:197:1::/64 Oct  9 20:57:40 set dhcpcd[1193]: wm0:
> changing route to fdc7:8cef:197:1::/64 via fe80::c256:27ff:fe6d:a283
> Oct  9 20:57:42 set dhcpcd[1193]: wm0: fe80::c256:27ff:fe6d:a283: no
> longer a default router (lifetime = 0) Oct  9 20:57:42 set
> dhcpcd[1193]: wm0: deleting default route via fe80::c256:27ff:fe6d:a283
> Oct  9 20:57:53 set dhcpcd[1193]: wm0: adding default route via
> fe80::c256:27ff:fe6d:a283 Oct  9 21:28:00 set dhcpcd[1193]: wm0:
> fe80::c256:27ff:fe6d:a283: no longer a default router (lifetime = 0)
> Oct  9 21:28:00 set dhcpcd[1193]: wm0: deleting default route via
> fe80::c256:27ff:fe6d:a283 Oct  9 21:28:11 set dhcpcd[1193]: wm0: adding
> default route via fe80::c256:27ff:fe6d:a283 Oct  9 21:58:18 set
> dhcpcd[1193]: wm0: fe80::c256:27ff:fe6d:a283: no longer a default
> router (lifetime = 0) Oct  9 21:58:18 set dhcpcd[1193]: wm0: deleting
> default route via fe80::c256:27ff:fe6d:a283 Oct  9 21:58:30 set
> dhcpcd[1193]: wm0: adding default route via fe80::c256:27ff:fe6d:a283
>
> Deleting the route and then adding it back again every half hour? The
> DHCP server is just a little old Linksys consumer router. Do I have
> something misconfigured? Or do I just need a new router because this
> one is buggy or obsolete?
>

Yeah probably. I don't think I've come across this one yet. The RA (if
that's what it's doing) has a lifetime and it might be timing out due
to bugs or mis-configuration of the router. I see lifetime=0 which is
a good clue. If you could wireshark the RA you might be able to find
out more.

Andy