Operations Console LAN adapter IPv6 support

Operations Console LAN adapter IPv6 support in IBM® i 7.2 might cause address conflicts.

Beginning in IBM i 7.2, Internet Protocol version 6 (IPv6) is supported by the Operations Console LAN adapter. If a console adapter is configured, IPv6 support is automatically enabled along with the existing IPv4 support. If both the console adapter and a system line description use the same communication resource (for example CMN01) and an *IP6SAC (IPv6 stateless address auto-configuration) TCP/IP interface is configured on that line description, an address conflict can occur that might prevent IPv6 from being activated on that adapter. Before IBM i 7.2 is installed, the conflict can be prevented by ensuring the *IP6SAC interface is configured with an interface ID other than *LIND. (For example, the command CHGTCPIFC INTNETADR(*IP6SAC) LIND(ETHLINE) IFCID(1234) changes the interface ID to 0x1234.) The interface ID is used by an *IP6SAC interface to automatically configure IPv6 addresses for the interface. Changing the interface ID changes the IPv6 addresses that are auto-configured. Alternatively, following the installation, IPv6 can be disabled or a unique interface ID can be configured on the Operations Console LAN adapter through dedicated service tools (DST) or system service tools (SST) to eliminate any conflict.