Re: ipv6 gateway on different subnet

I am so sorry! I tried to configure Claws mail to not wrap my tcpdump
and it spammed the list.

I am resending from gmail, and hope it doesn't do that again! I'm so
sorry everyone!


Well, after a busy weekend I'm going to try and keep this all straight.

On Sun, 19 Jan 2025 09:00:18 +0700 Robert Elz <[email protected]> wrote:
> So try
>     route add -inet6 default fe80::whatever%interface
>

This seemed to behave similar to using ipv6 for the gateway. Generally
inconsistent behavior and connections stop working etc. Pinging the
gateway doesn't always fix it.

I also noticed that LinkLayer is (incomplete) sometimes and everything
ipv6 goes down.

ndp -a
Neighbor                                Linklayer Address  Netif Expire    S Fl
fe80::da67:d9ff:fe58:3d1b%vioif0        (incomplete)      vioif0 22s       W R 6


/ect/rc.conf
defaultroute="23.173.152.1"
defaultroute6="fe80::da67:d9ff:fe58:3d1b%vioif0"

ifconfig_vioif0="
    inet 23.173.152.249 netmask 255.255.255.0
    inet6 2602:fed2:7116:d82c::1 prefixlen 64 alias
    inet6 2602:fed2:7116:d82c::2 prefixlen 64 alias
"

doas ifconfig vioif0 inet6 2602:fed2:7116:d82c::b prefixlen 64 alias
doas tcpdump -npi vioif0 -vw icmp6.pcap icmp6

from home computer

ping6 -c2 -t5 2602:fed2:7116:d82c::b
PING(56=40+8+8 bytes) 2600:1700:7960:9a70:a280:69ff:fef4:24f -->
2602:fed2:7116:d82c::b

--- 2602:fed2:7116:d82c::b ping statistics ---
2 packets transmitted, 0 packets received, 100.0% packet loss


Here's the result of the tcpdump.
07:40:55.118728 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b:
[icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has
fe80::da67:d9ff:fe58:3d1b
      source link-address option (1), length 8 (1): 00:16:3e:d7:cf:50
07:40:55.246853 d8:67:d9:58:3d:1b > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:1: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:2c8:0:102d::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:40:55.456182 d8:67:d9:58:3d:1b > 33:33:ff:00:00:03, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:3: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:fed2:7116:112::3
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:40:56.129187 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b:
[icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has
fe80::da67:d9ff:fe58:3d1b
      source link-address option (1), length 8 (1): 00:16:3e:d7:cf:50
07:40:56.148622 d8:67:d9:58:3d:1b > 33:33:ff:00:00:0b, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:b: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:fed2:7116:d82c::b
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:40:56.148659 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b:
[icmp6 sum ok] ICMP6, neighbor advertisement, length 32, tgt is
2602:fed2:7116:d82c::b, Flags [solicited, override]
      destination link-address option (2), length 8 (1): 00:16:3e:d7:cf:50
07:40:56.247064 d8:67:d9:58:3d:1b > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:1: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:2c8:0:102d::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:40:56.343110 d8:67:d9:58:3d:1b > 33:33:ff:00:00:03, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:3: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:fed2:7116:112::3
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:40:57.139621 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b:
[icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has
fe80::da67:d9ff:fe58:3d1b
      source link-address option (1), length 8 (1): 00:16:3e:d7:cf:50
07:40:57.147999 d8:67:d9:58:3d:1b > 33:33:ff:00:00:0b, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:b: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:fed2:7116:d82c::b
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:40:57.148024 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b:
[icmp6 sum ok] ICMP6, neighbor advertisement, length 32, tgt is
2602:fed2:7116:d82c::b, Flags [solicited, override]
      destination link-address option (2), length 8 (1): 00:16:3e:d7:cf:50
07:40:58.150085 00:16:3e:d7:cf:50 > 33:33:ff:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > ff02::1:ff58:3d1b: [icmp6 sum
ok] ICMP6, neighbor solicitation, length 32, who has
fe80::da67:d9ff:fe58:3d1b
      source link-address option (1), length 8 (1): 00:16:3e:d7:cf:50
07:40:58.741159 d8:67:d9:58:3d:1b > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:1: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:2c8:0:20f2::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:40:59.160524 00:16:3e:d7:cf:50 > 33:33:ff:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > ff02::1:ff58:3d1b: [icmp6 sum
ok] ICMP6, neighbor solicitation, length 32, who has
fe80::da67:d9ff:fe58:3d1b
      source link-address option (1), length 8 (1): 00:16:3e:d7:cf:50
07:41:00.005308 00:16:3e:35:13:09 > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) 2602:fed2:7116::2779:8871 > ff02::1:ff00:1: [icmp6 sum ok]
ICMP6, neighbor solicitation, length 32, who has 2602:fed2:7116::1
      source link-address option (1), length 8 (1): 00:16:3e:35:13:09
07:41:00.170987 00:16:3e:d7:cf:50 > 33:33:ff:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > ff02::1:ff58:3d1b: [icmp6 sum
ok] ICMP6, neighbor solicitation, length 32, who has
fe80::da67:d9ff:fe58:3d1b
      source link-address option (1), length 8 (1): 00:16:3e:d7:cf:50
07:41:01.181447 00:16:3e:d7:cf:50 > 33:33:ff:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > ff02::1:ff58:3d1b: [icmp6 sum
ok] ICMP6, neighbor solicitation, length 32, who has
fe80::da67:d9ff:fe58:3d1b
      source link-address option (1), length 8 (1): 00:16:3e:d7:cf:50
07:41:02.318930 00:16:3e:22:cb:ef > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) 2602:2c8:0:288f::1 > ff02::1:ff00:1: [icmp6 sum ok] ICMP6,
neighbor solicitation, length 32, who has 2602:2c8::1
      source link-address option (1), length 8 (1): 00:16:3e:22:cb:ef
07:41:02.713126 d8:67:d9:58:3d:1b > 33:33:ff:00:00:00, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:0: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2604:f440:3:17::
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:41:03.206600 d8:67:d9:58:3d:1b > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:1: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:2c8:0:103f::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:41:03.206974 d8:67:d9:58:3d:1b > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:1: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:2c8:0:1027::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:41:03.267520 d8:67:d9:58:3d:1b > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:1: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:2c8:0:103f::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:41:03.272922 d8:67:d9:58:3d:1b > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:1: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:2c8:0:1027::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
07:41:03.713173 d8:67:d9:58:3d:1b > 33:33:ff:00:00:00, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:0: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2604:f440:3:17::
      source link-address option (1), length 8 (1):
      d8:67:d9:58:3d:1b


On Mon, 20 Jan 2025 08:09:06 +1300 Lloyd Parkes
<[email protected]> wrote:
> Anyway I got this to work in my home lab with the following
>
>     1) route add -inet6 default 2602:fed2:7116::1 -connected -ifp wm2
>     2) Turn off dhcpcd (this is critical).
>

I have dhcpcd off

doas service -e
/etc/rc.d/modules
/etc/rc.d/ccd
/etc/rc.d/random_seed
/etc/rc.d/sysdb
/etc/rc.d/wscons
/etc/rc.d/syslogd
/etc/rc.d/ppp
/etc/rc.d/cleartmp
/etc/rc.d/dmesg
/etc/rc.d/ldconfig
/etc/rc.d/quota
/etc/rc.d/virecover
/etc/rc.d/savecore
/etc/rc.d/makemandb
/etc/rc.d/motd
/etc/rc.d/powerd
/etc/rc.d/sshd
/etc/rc.d/inetd
/etc/rc.d/cron

/etc/rc.conf
defaultroute="23.173.152.1"

ifconfig_vioif0="
    inet 23.173.152.249 netmask 255.255.255.0
    inet6 2602:fed2:7116:d82c::1 prefixlen 64 alias
    inet6 2602:fed2:7116:d82c::2 prefixlen 64 alias
    !route add -inet6 default 2602:fed2:7116::1 -connected -ifp vioif0
"
dns_nameservers="9.9.9.9 2620:fe::fe"

used ::c this time
doas ifconfig vioif0 inet6 2602:fed2:7116:d82c::c prefixlen 64 alias

same netstat routine as before
ping6 -c2 -t5 2602:fed2:7116:d82c::c
PING(56=40+8+8 bytes) 2600:1700:7960:9a70:a280:69ff:fef4:24f -->
2602:fed2:7116:d82c::c

--- 2602:fed2:7116:d82c::c ping statistics ---
2 packets transmitted, 0 packets received, 100.0% packet loss

08:47:09.941048 d8:67:d9:58:3d:1b > 33:33:ff:00:00:05, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:5: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has 2602:2c8::5
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:10.942769 d8:67:d9:58:3d:1b > 33:33:ff:00:00:05, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:5: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has 2602:2c8::5
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:11.062233 d8:67:d9:58:3d:1b > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:1: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:2c8:0:103f::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:11.201505 d8:67:d9:58:3d:1b > 33:33:ff:00:00:0c, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:c: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:fed2:7116:d82c::c
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:11.201537 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b:
[icmp6 sum ok] ICMP6, neighbor advertisement, length 32, tgt is
2602:fed2:7116:d82c::c, Flags [solicited, override]
      destination link-address option (2), length 8 (1): 00:16:3e:d7:cf:50
08:47:12.184335 00:16:3e:ab:bf:07 > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) 2602:2c8:0:1007::1 > ff02::1:ff00:1: [icmp6 sum ok] ICMP6,
neighbor solicitation, length 32, who has 2602:2c8::1
      source link-address option (1), length 8 (1): 00:16:3e:ab:bf:07
08:47:12.184580 00:16:3e:85:d4:98 > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) 2602:2c8:0:1010::1 > ff02::1:ff00:1: [icmp6 sum ok] ICMP6,
neighbor solicitation, length 32, who has 2602:2c8::1
      source link-address option (1), length 8 (1): 00:16:3e:85:d4:98
08:47:12.201801 d8:67:d9:58:3d:1b > 33:33:ff:00:00:0c, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:c: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:fed2:7116:d82c::c
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:12.201844 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b:
[icmp6 sum ok] ICMP6, neighbor advertisement, length 32, tgt is
2602:fed2:7116:d82c::c, Flags [solicited, override]
      destination link-address option (2), length 8 (1): 00:16:3e:d7:cf:50
08:47:13.149723 d8:67:d9:58:3d:1b > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:1: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:2c8:0:1027::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:13.770778 d8:67:d9:58:3d:1b > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:1: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:2c8:0:103f::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:13.818829 d8:67:d9:58:3d:1b > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:1: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:2c8:0:1027::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:15.731096 00:16:3e:42:db:e0 > 33:33:ff:00:00:01, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) 2602:fed2:7116::16dc:bc5d > ff02::1:ff00:1: [icmp6 sum ok]
ICMP6, neighbor solicitation, length 32, who has 2602:fed2:7116::1
      source link-address option (1), length 8 (1): 00:16:3e:42:db:e0
08:47:16.212449 d8:67:d9:58:3d:1b > 33:33:ff:00:00:00, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:0: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2604:f440:3:5:1::
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:16.265331 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b:
[icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has
fe80::da67:d9ff:fe58:3d1b
      source link-address option (1), length 8 (1): 00:16:3e:d7:cf:50
08:47:16.769293 d8:67:d9:58:3d:1b > 33:33:ff:00:00:00, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:0: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2604:f440:3:17::
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:16.912688 d8:67:d9:58:3d:1b > 33:33:ff:00:00:00, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:0: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2604:f440:3:17::
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:17.212761 d8:67:d9:58:3d:1b > 33:33:ff:00:00:00, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:0: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2604:f440:3:5:1::
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
08:47:17.280037 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b:
[icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has
fe80::da67:d9ff:fe58:3d1b
      source link-address option (1), length 8 (1): 00:16:3e:d7:cf:50
08:47:18.294751 00:16:3e:d7:cf:50 > d8:67:d9:58:3d:1b, ethertype IPv6
(0x86dd), length 86: (hlim 255, next-header ICMPv6 (58) payload
length: 32) fe80::216:3eff:fed7:cf50 > fe80::da67:d9ff:fe58:3d1b:
[icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has
fe80::da67:d9ff:fe58:3d1b
      source link-address option (1), length 8 (1): 00:16:3e:d7:cf:50
08:47:18.377073 00:67:c9:9b:83:a1 > 33:33:00:00:00:02, ethertype IPv6
(0x86dd), length 70: (flowlabel 0x6353b, hlim 255, next-header ICMPv6
(58) payload length: 16) fe80::267:c9ff:fe9b:83a1 > ff02::2: [icmp6
sum ok] ICMP6, router solicitation, length 16
      source link-address option (1), length 8 (1):
      00:67:c9:9b:83:a1


I will go ahead and get some debian output, hopefully soon.

On Sun, Jan 19, 2025 at 1:59 PM Lloyd Parkes
<[email protected]> wrote:
>
> On Sun, 2025-01-19 at 19:29 +0000, Roy Marples wrote:
> >
> > dhcpcd deletes routes because it has it's own route to apply from RA
> > or some other source which would conflict with the one you added.
>
> Since I was running this in my home lab I absolutely had a "proper"
> IPv6 router advertising a conflicting IPv6 default route. Therefore
> this could just be a problem with my lab setup.
>
> We should see what happens with Peter's actual VPS. I did notice while
> reading the ndp manual page that Neighbour Unreachability Detection is
> a thing and while that shouldn't be a problem, who knows with a VPS
> provider.
>
> Ngā mihi,
> Lloyd
>


-- 
Thanks
Peter