IP6ADDRCTL(8) BSD System Manager's Manual IP6ADDRCTL(8)NAMEip6addrctl — configure address selection policy for IPv6 and IPv4
ip6addrctl add prefix precedence label
ip6addrctl delete prefix
ip6addrctl install configfile
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.
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 prece‐
dence and label values for the entry, respectively. This opera‐
tion should be performed without an existing entry for the pre‐
Delete a policy entry specified by prefix, which should be an
IPv6 prefix. A corresponding entry for the prefix should have
already been installed.
flush Delete all existing policy entries in the kernel.
Install policy entries from a configuration file named
configfile. The configuration file should contain a set of pol‐
icy entries. Each entry is specified in a single line which con‐
tains 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.
The ip6addrctl utility exits 0 on success, and >0 if an error occurs.
Richard Draves, Default Address Selection for IPv6, RFC 3484.
The ip6addrctl utility first appeared in the KAME IPv6 protocol stack
kit. The original command name was addrselect, but it was then renamed
to the current one so that the name would describe its function well.
BSD September 25, 2001 BSD