Re: ipv6 gateway on different subnet

[Peter Miller <feurry%gmail.com@localhost>]

Is this what I'm after? I sent 2 pings and had tcpdump running just
before and a few seconds after.
To me it looks like the server responded to the request, but this is
my first foray into tcpdump.

..."tgt is 2602:fed2:7116:d82c::b, Flags [solicited, override]"

If this output is good, I'll go ahead and install linux for a test.

# on my laptop
ping6 -c2 -t5 2602:fed2:7116:d82c::b
PING(56=40+8+8 bytes) 2601:2c3:cc81:5c70: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

# NetBSD server
doas ifconfig vioif0 inet6 2602:fed2:7116:d82c::b prefixlen 64 alias
doas tcpdump -npevi vioif0 icmp6 > d82c.b
15:36:35.351900 d8:67:d9:58:3d:1b > 33:33:ff:00:00:09, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:9: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:fed2:7116:7eb6::9
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
15:36:37.256044 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
15:36:37.256096 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
15:36:37.292472 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
15:36:37.669081 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
15:36:38.019164 d8:67:d9:58:3d:1b > 33:33:ff:f8:15:1d, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:fff8:151d:
[icmp6 sum ok] ICMP6, neighbor solicitation, length 32, who has
2607:8cc0:2333:53e9:44ec:580c:d9f8:151d
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
15:36:38.255248 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
15:36:38.255288 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
15:36:38.885054 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
2602:2c8:0:1007::1
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
15:36:42.292987 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
15:36:42.747752 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
15:36:42.774536 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
15:36:42.884073 d8:67:d9:58:3d:1b > 33:33:ff:00:00:09, ethertype IPv6
(0x86dd), length 86: (class 0xe0, hlim 255, next-header ICMPv6 (58)
payload length: 32) fe80::da67:d9ff:fe58:3d1b > ff02::1:ff00:9: [icmp6
sum ok] ICMP6, neighbor solicitation, length 32, who has
2602:fed2:7116:7eb6::9
      source link-address option (1), length 8 (1): d8:67:d9:58:3d:1b
15:36:43.302050 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
15:36:43.687209 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
15:36:43.749480 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
15:36:43.774412 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


-- 
Thanks
Peter