RFC 2280 (rfc2280) - Page 2 of 53

Routing Policy Specification Language (RPSL)

RFC 2280                          RPSL                      January 1998


       6.1.3 Filter Specification  . . . . . . . . . . . . . . . . . 20
       6.1.4 Example Policy Expressions  . . . . . . . . . . . . . . 24
     6.2 export Attribute:  Export Policy Specification  . . . . . . 24
      6.3 Other Routing  Protocols, Multi-Protocol Routing
       Protocols, and Injecting Routes Between Protocols   . . . . . 25
     6.4 Ambiguity Resolution  . . . . . . . . . . . . . . . . . . . 26
     6.5 default Attribute:  Default Policy Specification  . . . . . 28
     6.6 Structured Policy Specification . . . . . . . . . . . . . . 29
   7 dictionary Class                                                33
     7.1 Initial RPSL Dictionary and Example Policy Actions
      and Filters  . . . . . . . . . . . . . . . . . . . . . . . . . 36
   8 Advanced route Class                                            41
     8.1 Specifying Aggregate Routes . . . . . . . . . . . . . . . . 41
       8.1.1 Interaction with policies in aut-num class  . . . . . . 45
       8.1.2 Ambiguity resolution with overlapping aggregates  . . . 46
     8.2 Specifying Static Routes  . . . . . . . . . . . . . . . . . 47
   9 inet-rtr Class                                                  48
   10 Security Considerations                                        49
   11 Acknowledgements                                               50
   A Routing Registry Sites                                          51
   B Authors' Addresses                                              52
   C Full Copyright Statement                                        53

1 Introduction

   This memo is the reference document for the Routing Policy
   Specification Language (RPSL). RPSL allows a network operator to be
   able to specify routing policies at various levels in the Internet
   hierarchy; for example at the Autonomous System (AS) level.  At the
   same time, policies can be specified with sufficient detail in RPSL
   so that low level router configurations can be generated from them.
   RPSL is extensible; new routing protocols and new protocol features
   can be introduced at any time.

   RPSL is a replacement for the current Internet policy specification
   language known as RIPE-181 [4] or RFC-1786 [5].  RIPE-81 [6] was the
   first language deployed in the Internet for specifying routing
   policies.  It was later replaced by RIPE-181 [4].  Through
   operational use of RIPE-181 it has become apparent that certain
   policies cannot be specified and a need for an enhanced and more
   generalized language is needed.  RPSL addresses RIPE-181's
   limitations.









Alaettinoglu, et. al.       Standards Track