3. Changes to RFC 4271

This section updates [RFC4271] to specify the default behavior of a BGP speaker when there are no Import or Export Policies associated with a particular EBGP session. A BGP speaker MAY provide a configuration option to deviate from the following updated behaviors.

The following paragraph is added to Section 9.1 (Decision Process) after the fifth paragraph, which ends in "route aggregation and route information reduction":

Routes contained in an Adj-RIB-In associated with an EBGP peer SHALL NOT be considered eligible in the Decision Process if no explicit Import Policy has been applied.

The following paragraph is added to Section 9.1.3 (Phase 3: Route Dissemination) after the third paragraph, which ends in "by means of an UPDATE message (see 9.2).":

Routes SHALL NOT be added to an Adj-RIB-Out associated with an EBGP peer if no explicit Export Policy has been applied.