[Bug 263288] IPv6 system not responding to Neighbor Solicitation

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 15 Apr 2022 17:09:19 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263288

--- Comment #3 from wcarson.bugzilla@disillusion.net ---
The router seems to be immediately stale. If I clear all entries (ndp -c), they
show up but are stale:

root@roast:~ # date ; ndp -c ; echo ; date ; ndp -na ; echo ; sleep 5 ; date ;
ndp -na
Fri Apr 15 12:01:12 CDT 2022
fe80::1%em0 (fe80::1%em0) deleted

Fri Apr 15 12:01:12 CDT 2022
Neighbor                             Linklayer Address  Netif Expire    S Flags
2600:3c00:e000:137::1:1              f2:3c:91:b0:a5:6f    em0 permanent 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

Fri Apr 15 12:01:17 CDT 2022
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 23h59m56s S 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


Also, I think they block ping on their routers, or at least I don't think it
worked in Linux either.


root@roast:~ # ping ipv6.google.com
PING6(56=40+8+8 bytes) 2600:3c00::f03c:91ff:feb0:a56f -->
2607:f8b0:4023:1000::64
^C
--- ipv6.l.google.com ping6 statistics ---
24 packets transmitted, 0 packets received, 100.0% packet loss
root@roast:~ # ping6 2600:3c00::8678:acff:fe1c:ec41
PING6(56=40+8+8 bytes) 2600:3c00::f03c:91ff:feb0:a56f -->
2600:3c00::8678:acff:fe1c:ec41
^C
--- 2600:3c00::8678:acff:fe1c:ec41 ping6 statistics ---
10 packets transmitted, 0 packets received, 100.0% packet loss
root@roast:~ # ping6 fe80::1%em0
PING6(56=40+8+8 bytes) fe80::f03c:91ff:feb0:a56f%em0 --> fe80::1%em0
^C
--- fe80::1%em0 ping6 statistics ---
7 packets transmitted, 0 packets received, 100.0% packet loss
root@roast:~ # ping6 fe80::8678:acff:fe1c:ec41%em0
PING6(56=40+8+8 bytes) fe80::f03c:91ff:feb0:a56f%em0 -->
fe80::8678:acff:fe1c:ec41%em0
^C
--- fe80::8678:acff:fe1c:ec41%em0 ping6 statistics ---
243 packets transmitted, 0 packets received, 100.0% packet loss
root@roast:~ #

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