Penguin
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IPV6 Link local addresses are autoconfigured addresses based on the devices MAC address.

The biggest problem is that the kernel has fe80::0/10 routed with every interface, so if you ping a link local address it doens't know which interface to use.

The way to get around this is to tell the program which interface to use.

telnet
$ telnet.netkit fe80::205:1cff:fe10:5edf%wan0 bgpd Trying fe80::205:1cff:fe10:5edf%wan0... Connected to fe80::205:1cff:fe10:5edf%wan0. Escape character is '^]'.
ping
$ ping6 -I eth1 fe80::202:2dff:fe51:a1b2

etc.

This, and other gotcha's with IPv6 is discussed in IPv6LessonsLearnt.

See IPv6Addressing, Compare SiteLocal and GlobalScope addresses.


CategoryNetworking