1. Introduction

1. Introduction

BGP supports transit policies via controlled distribution of routing information. Mechanisms for this are described in [1] and have been successfully used by transit service providers. However, control over the distribution of routing information is presently based on either IP address prefixes or on the value of the AS_PATH attribute (or part of it).

To facilitate and simplify the control of routing information this document suggests a grouping of destinations so that the routing decision can also be based on the identity of a group. Such a scheme is expected to significantly simplify a BGP speaker's configuration that controls distribution of routing information.