gated export control statements
The import statement controls which routes received from other systems are
used by gated, and the export statement controls which routes are
advertised by gated
to other systems. Like the import statement, the syntax
of the export statement varies slightly per protocol. The syntax of the
export statement is similar to the syntax of the import statement, and the
meanings of many of the parameters are identical. The main difference
between the two is that while route importation is controlled just by source
information, route exportation is controlled by both destination and source.
The outer portion of a given export statement specifies the destination of the routing information you are controlling. The middle portion restricts the sources of importation that you wish to consider. The innermost portion is a route filter used to select individual routes.