dhcpcd bge0 (or axe0) -6 cannot finish with my home router PR-S300HI

[Ryo ONODERA <ryo_on%yk.rim.or.jp@localhost>]

Hi,

dhcpcd bge0 (or axe0)-6 cannot finish under NetBSD/amd64 6.99.23 with
my home router appliance, PR-H300HI.
PR-H300HI is Linux based router appliance, but I have no idea
about its DHCPv6 implementation.
For VoIP telephony, I must use this appliance...

How to debug this issue?
IPv4 only dhcpcd (dhcpcd bge0 -4) works fine with NetBSD 5.2's dhcpd.

$ dhcpcd --version
dhcpcd 6.3.1
Copyright (c) 2006-2014 Roy Marples

# dhcpcd bge0 -6 -d
dhcpcd[21408]: version 6.3.1 starting
dhcpcd[21408]: bge0: executing `/libexec/dhcpcd-run-hooks' PREINIT
dhcpcd[21408]: bge0: executing `/libexec/dhcpcd-run-hooks' CARRIER
dhcpcd[21408]: DUID 00:01:00:01:19:87:ba:5c:40:6c:8f:58:6c:c5
dhcpcd[21408]: bge0: IAID 8f:58:6c:c5
dhcpcd[21408]: bge0: soliciting an IPv6 router
dhcpcd[21408]: bge0: sending Router Solicitation
dhcpcd[21408]: bge0: Router Advertisement from fe80::21f:67ff:fee1:609a
dhcpcd[21408]: bge0: adding address 2408:211:9227:ce00:426c:8fff:fe58:6cc5/64
dhcpcd[21408]: bge0: vltime 14400 seconds, pltime 12600 seconds
dhcpcd[21408]: bge0: adding route to 2408:211:9227:ce00::/64
dhcpcd[21408]: bge0: adding default route via fe80::21f:67ff:fee1:609a
dhcpcd[21408]: bge0: executing `/libexec/dhcpcd-run-hooks' ROUTERADVERT
dhcpcd[21408]: bge0: requesting DHCPv6 information
dhcpcd[21408]: bge0: delaying INFORM6 (xid 0xb3e0c8), next in 0.3 seconds
dhcpcd[21408]: bge0: broadcasting INFORM6 (xid 0xb3e0c8), next in 1.0 seconds
(freeze)

--
Ryo ONODERA // ryo_on%yk.rim.or.jp@localhost
PGP fingerprint = 82A2 DC91 76E0 A10A 8ABB  FD1B F404 27FA C7D1 15F3