Administering TCP/IP Networks, IPMP, and IP Tunnels in Oracle^® Solaris 11.3

Description of the ipaddrsel Command

The ipaddrsel command enables you to modify the IPv6 default address selection policy table.

The Oracle Solaris kernel uses the IPv6 default address selection policy table to perform destination address ordering and source address selection for an IPv6 packet header. The /etc/inet/ipaddrsel.conf file contains the policy table.

The following table lists the default address formats and their priorities for the policy table. You can find technical details for IPv6 address selection in the inet6(7P) man page.

Table 1  IPv6 Address Selection Policy Table

Prefix Precedence Definition ::1/128 50 Loopback ::/0 40 Default 2002::/16 30 6to4 ::/96 20 IPv4 Compatible ::ffff:0:0/96 10 IPv4

In this table, IPv6 prefixes (::1/128 and ::/0) take precedence over 6to4 addresses (2002::/16) and IPv4 addresses (::/96 and ::ffff:0:0/96). Therefore, by default, the kernel selects the global IPv6 address of the interface for packets going to another IPv6 destination. The IPv4 address of the interface has a lower priority, particularly for packets going to an IPv6 destination. Given the selected IPv6 source address, the kernel also uses the IPv6 format for the destination address.