Re: High latency for IPv6 on netbsd-8

[Gua Chung Lim <gua.chunglim%gmail.com@localhost>]

Thanks for your kind response.

* Martin Husemann (martin%duskware.de@localhost) wrote:
> In the not working case, wm0 has:
> 
>   inet6 2405:9800:b550:2939:f234:69d6:e0bf:8ebf/64 flags 0x0
>   inet6 2405:9800:b550:2939:8638:35ff:fe48:5720/128 flags 0x0
> 
> and it would be good to understand where the second comes from.
> Maybe add "-d" to dhcpcd_flags in /etc/rc.conf and see what it
> says?
-d flag when ping6 is NOT working,
Excerpted from /var/run/rc.log.
https://pastebin.com/JXkKxuSc

-d flag when ping6 is working,
# /etc/rc.d/dhcpcd stop
(then leave it 5-6 seconds)
# /etc/rc.d/dhcpcd start
https://pastebin.com/iu4utd9y

% uname -a
NetBSD netbsd 8.0_STABLE NetBSD 8.0_STABLE (GENERIC) #1: Sat Jul 28 08:47:57 +07 2018  root@netbsd.localdomain:/usr/obj/sys/arch/amd64/compile/GENERIC amd64

For now, my only workaround is to repeat restarting the router until ping6 works, and without touching any configuration on netbsd-8. I don't suspect my router, as the other machines on the same LAN (including the previous netbsd-7) are still working pretty fine. I don't suspect dhcpcd as both inet and inet6 got assigned. And I don't suspect name resolution as it can always interpret canonical names into numeric addresses for both inet and inet6.

Any ideas?

Thank you.

-- 
Gua Chung Lim
 
"UNIX is basically a simple operating system,
but you have to be a genius to understand the simplicity."
-- Dennis M. Ritchie