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=== Using automatic link-local addresses (IPv6-only) === | === Using automatic link-local addresses (IPv6-only) === | ||
Link-local addresses on Ethernet work without any configuration tools | |||
except that you have to activate the interface first. | |||
<pre> | |||
# device=eth1 | |||
# | |||
# ip link set $device up | |||
</pre> | |||
Kernel automatically assigns a MAC-derived link-local address to any | |||
active Ethernet interface. | |||
<pre> | |||
# ip address show dev $device | |||
</pre> | |||
If you know another link-local address on the network, you should be able | |||
to test it with the <code>ping</code> command. | |||
<pre> | |||
# ping ..... | |||
</pre> | |||
Oh, wait, <code>ping</code> doesn't work. Use <code>ping6</code>. | |||
<pre> | |||
# ping6 ..... | |||
</pre> | |||
Failed again. Now we're getting to the point. Link-local addresses use the same | |||
network prefix on every interface. We need to specify the local network interface | |||
to be used to contact the particular link-local address. | |||
<pre> | |||
# ping6 ....%eth0 | |||
</pre> | |||
=== Static runtime configuration (iproute2) === | === Static runtime configuration (iproute2) === | ||
Revision as of 07:57, 21 November 2012
Using automatic link-local addresses (IPv6-only)
Link-local addresses on Ethernet work without any configuration tools except that you have to activate the interface first.
# device=eth1 # # ip link set $device up
Kernel automatically assigns a MAC-derived link-local address to any active Ethernet interface.
# ip address show dev $device
If you know another link-local address on the network, you should be able
to test it with the ping command.
# ping .....
Oh, wait, ping doesn't work. Use ping6.
# ping6 .....
Failed again. Now we're getting to the point. Link-local addresses use the same network prefix on every interface. We need to specify the local network interface to be used to contact the particular link-local address.
# ping6 ....%eth0
Static runtime configuration (iproute2)
ip address add 192.168.1.1/24 dev eth0 ip address add 2001:db8:1:2::1 dev eth0