--- 1/draft-ietf-idr-as4bytes-02.txt 2006-02-04 23:29:09.000000000 +0100 +++ 2/draft-ietf-idr-as4bytes-03.txt 2006-02-04 23:29:09.000000000 +0100 @@ -1,19 +1,18 @@ - Network Working Group Quaizar Vohra Internet Draft Juniper Networks -Expiration Date: October 2001 Enke Chen +Expiration Date: November 2001 Enke Chen Network Working Group Redback Networks, Inc. BGP support for four-octet AS number space - draft-ietf-idr-as4bytes-02.txt + draft-ietf-idr-as4bytes-03.txt 1. Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. @@ -105,24 +104,24 @@ A BGP speaker that supports 4-octets Autonomous System numbers may advertise this to its peers using the BGP Capability Advertisements. A BGP speaker that advertises such capability to a particular peer, and receives from that peer the advertisement of such capability MUST encode Autonomous System numbers as 4-octets entities in both the AS_PATH and the AGGREGATOR attributes in the updates it sends to the peer, and MUST assume that these attributes in the updates received from the peer encode Autonomous System numbers as 4-octets entities. The new attributes, NEW_AS_PATH and NEW_AGGREGATOR should not be - carried in the updates between NEW BGP peers. A NEW BGP speaker that - receives an UPDATE message from a NEW BGP speaker, with the - NEW_AS_PATH attribute carried in the UPDATE message must ignore the - attribute. The same applies to the NEW_AGGREGATOR attribute. + carried in the UPDATE messages between NEW BGP peers. A NEW BGP + speaker that receives the NEW_AS_PATH and NEW_AGGREGATOR path + attributes in an UPDATE message from a NEW BGP speaker should discard + these path attributes and continue processing the UPDATE message. 4.2. Interaction between NEW and OLD BGP speaker 4.2.1. BGP Peering Note that peering between a NEW BGP speaker and an OLD one is possible only if the NEW BGP speaker has a 2-octets AS number. However, this document doesn't assume that an Autonomous System with NEW speakers has to have a globally unique 2-octets AS number - AS_TRANS could be used instead (even if multiple Autonomous System @@ -254,31 +253,31 @@ In addition, this document introduces two new BGP optional transitive attributes. The first is the NEW_AS_PATH attribute, which preserves the AS path information with 4-octet AS numbers across old BGP speakers. The second is the NEW_AGGREGATOR attribute, which is similar in use to the current AGGREGATOR attribute but it carries 4-octet AS numbers. The Type Codes for these attributes are to be assigned by IANA. Finally, this document introduces a reserved 2-octets AS number - - AS_TRANS. The AS number for AS_TRANS are to be assigned by the IANA. + AS_TRANS. The AS number for AS_TRANS is to be assigned by the IANA. 8. Security Considerations Security issues are not discussed in this document. 9. Acknowledgments - The authors would like to thank Yakov Rekhter and Chaitanya - Kodeboyina for the numerous discussions which went into the making of - this draft. + The authors would like to thank Yakov Rekhter, Chaitanya Kodeboyina, + and Jeffrey Haas for the numerous discussions which went into the + making of this draft. 10. References [BGP] Rekhter, Y., Li, T., "Border Gateway Protocol 4", draft-ietf- idr-bgp4-12.txt [EXT-COM] Ramachandra, S., Tappan, D., and Rekter Y. "BGP Extended Communities Attribute", draft-ramachandra-bgp-ext-communities-02.txt [RFC1997] Chandra, R., Traina, P. and T. Li, "BGP Communities