[Bug 263288] IPv6 system not responding to Neighbor Solicitation

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 16 Apr 2022 17:15:35 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263288

--- Comment #5 from wcarson.bugzilla@disillusion.net ---
Interestingly after issuing those commands it worked for about 65 seconds:

root@roast:~ # ndp -nr
fe80::1%em0 if=em0, flags=, pref=medium, expire=11s

root@roast:~ # date; ndp -c; ping6 -c1 -t2 fe80::1%em0; ndp -na; echo; ping6
-c1 -t2 fe80::8678:acff:fe1c:ec41%em0; ndp -na;

Sat Apr 16 12:11:06 CDT 2022

fe80::1%em0 (fe80::1%em0) deleted
fe80::8678:acff:fe1c:ec41%em0 (fe80::8678:acff:fe1c:ec41%em0) deleted


PING6(56=40+8+8 bytes) fe80::f03c:91ff:feb0:a56f%em0 --> fe80::1%em0

--- fe80::1%em0 ping6 statistics ---
1 packets transmitted, 0 packets received, 100.0% packet loss


Neighbor                             Linklayer Address  Netif Expire    S Flags
2600:3c00:e000:137::1:1              f2:3c:91:b0:a5:6f    em0 permanent R
fe80::1%em0                          00:05:73:a0:0f:ff    em0 13s       R R
2600:3c00:e000:137::1                f2:3c:91:b0:a5:6f    em0 permanent R
2600:3c00:e000:137::3:1              f2:3c:91:b0:a5:6f    em0 permanent R
2600:3c00:e000:137::2:1              f2:3c:91:b0:a5:6f    em0 permanent R
2600:3c00::f03c:91ff:feb0:a56f       f2:3c:91:b0:a5:6f    em0 permanent R
fe80::f03c:91ff:feb0:a56f%em0        f2:3c:91:b0:a5:6f    em0 permanent R
2600:3c00:e000:137:cafe:8a2e:370:7334 f2:3c:91:b0:a5:6f   em0 permanent R

PING6(56=40+8+8 bytes) fe80::f03c:91ff:feb0:a56f%em0 -->
fe80::8678:acff:fe1c:ec41%em0

--- fe80::8678:acff:fe1c:ec41%em0 ping6 statistics ---
1 packets transmitted, 0 packets received, 100.0% packet loss


Neighbor                             Linklayer Address  Netif Expire    S Flags
2600:3c00:e000:137::1:1              f2:3c:91:b0:a5:6f    em0 permanent R
fe80::1%em0                          00:05:73:a0:0f:ff    em0 11s       R R
2600:3c00:e000:137::1                f2:3c:91:b0:a5:6f    em0 permanent R
2600:3c00:e000:137::3:1              f2:3c:91:b0:a5:6f    em0 permanent R
2600:3c00:e000:137::2:1              f2:3c:91:b0:a5:6f    em0 permanent R
2600:3c00::f03c:91ff:feb0:a56f       f2:3c:91:b0:a5:6f    em0 permanent R
fe80::f03c:91ff:feb0:a56f%em0        f2:3c:91:b0:a5:6f    em0 permanent R
fe80::8678:acff:fe1c:ec41%em0        84:78:ac:1c:ec:41    em0 13s       R R
2600:3c00:e000:137:cafe:8a2e:370:7334 f2:3c:91:b0:a5:6f   em0 permanent R


root@roast:~ # ping6 kyoto.disillusion.net
PING6(56=40+8+8 bytes) 2600:3c00::f03c:91ff:feb0:a56f -->
2605:6400:10:968:22:da15:28a6:c800
16 bytes from 2605:6400:10:968:22:da15:28a6:c800, icmp_seq=0 hlim=53
time=42.126 ms
16 bytes from 2605:6400:10:968:22:da15:28a6:c800, icmp_seq=1 hlim=53
time=41.984 ms

*snip*

16 bytes from 2605:6400:10:968:22:da15:28a6:c800, icmp_seq=64 hlim=53
time=43.413 ms
^C
--- kyoto.disillusion.net ping6 statistics ---
110 packets transmitted, 64 packets received, 41.8% packet loss
round-trip min/avg/max/std-dev = 41.831/42.388/45.270/0.607 ms

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