Veritas NetBackup™ Administrator's Guide, Volume I

Source binding evaluation

The prospective source binding list is provided by the operating system and consists of all of the local plumbed interfaces that are not loopback (127.0.0.0/8, ::1) and not link-local (169.254.0.0/16, fe80::/64).

The PREFERRED_NETWORK entries are then evaluated in the sort order by longest subnet first, then position when subnets are equal. Any local interfaces that match a source entry are moved to a second list if still present in the first list. Any local interfaces that match a target PROHIBITED entry are removed from the first list if not already moved to the second list.

If local interfaces were moved to the second list, that list becomes the tentative binding list. If the second list is empty, and interfaces were removed from the first list, then the shortened first list becomes the tentative binding list.

If a destination matches the target of an entry with a source, the tentative binding list is searched for the first match to an entry in source. If a match is found, that interface becomes the source requested by NetBackup for the outbound connection.

Otherwise, if the tentative binding list is the shortened first list, then it becomes the source binding list for the outbound connection.

Otherwise, ANY becomes the source binding list for the outbound connection.