FreeBSD 12 netstat:
```
11:25 [1] m@devel0 ~/netstat/netstat_12 -sp icmp6
icmp6:
0 calls to icmp6_error
0 errors not generated in response to an icmp6 message
0 errors not generated because of rate limitation
Output histogram:
neighbor solicitation: 122
neighbor advertisement: 107
MLDv2 listener report: 4
...
```
FreeBSD head:
```
11:25 [1] m@devel0 ~/netstat/netstat_head -sp icmp6
icmp6:
0 calls to icmp6_error
0 errors not generated in response to an icmp6 message
0 errors not generated because of rate limitation
Output histogram:
neighbor solicitation: 123
neighbor advertisement: 108
MLDv2 listener report: 4
...
```
Supported versions:
```
11:25 [1] m@devel0 sysctl -o net.inet6.icmp6.stats
net.inet6.icmp6.stats.0: Format:S Length:4328 Dump:0x00000000000000000000000000000000...
net.inet6.icmp6.stats.1: Format:S Length:4624 Dump:0x00000000000000000000000000000000...
```