I have 2 Linux computers with the following IPv6 addresses:
1: fe80::de0e:a1ff:fe15:13e0 prefixlen 64
2: fe80::2e0:4cff:feb0:f8d prefixlen 64
When on the first computer I try:
# ping fe80::2e0:4cff:feb0:f8d
ping: unknown host fe80::2e0:4cff:feb0:f8d
So, it seems, that the addresses are assigned incorrectly, and it can't find the 2-nd computer. What is wrong?
Firstly, you need to use ping6. Secondly, you need to specify an interface with -I; as the man page says:
-I interface
[...] For ping6, when doing ping to a link-local scope address, link specification (by the '%'-notation in destination, or by this option) is required.
Et voila:
[me@risby scratch]$ ping6 -I p1p1 fe80::213:72ff:feba:3750
[...]
64 bytes from fe80::213:72ff:feba:3750: icmp_seq=1 ttl=64 time=0.232 ms
64 bytes from fe80::213:72ff:feba:3750: icmp_seq=2 ttl=64 time=0.786 ms
