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Configures the address selection policy for IPv6 and IPv4.

The ip6addrctl utility manages the policy table of source and destination address selection for outgoing IPv4 and IPv6 packets. When ip6addrctl is invoked without an argument or with a single argument show, it prints the content of the policy table currently installed in the kernel.

ip6addrctl [show]
ip6addrctl add prefix precedence label
ip6addrctl delete prefix
ip6addrctl flush
ip6addrctl install configfile


To modify the table, the following operations are available:

add prefix precedence label
Add a policy entry. The prefix argument is an IPv6 prefix, which is a key for the entry. An IPv4 prefix should be specified with an IPv6 prefix using an IPv4-mapped IPv6 address. The precedence and label arguments are decimal numbers, which specify the precedence and label values for the entry, respectively. This operation should be performed without an existing entry for the prefix.
delete prefix
Delete a policy entry specified by prefix, which should be an IPv6 prefix. A corresponding entry for the prefix should have already been installed.
Delete all existing policy entries in the kernel.
install configfile
Install policy entries from a configuration file named configfile. The configuration file should contain a set of policy entries. Each entry is specified in a single line which contains an IPv6 prefix, a decimal precedence value, and a decimal label value, separated with white space or tab characters. In the configuration file, lines beginning with the pound-sign (`#') are comments and are ignored.

Exit status

The ip6addrctl utility exits 0 on success, and >0 if an error occurs.


INtime 4.0

See Also

Richard Draves, Default Address Selection for IPv6, RFC 3484.