Using BGP Without Consuming a Unique ASN

Document Type Expired Internet-Draft (individual)
Authors John Stewart  , Enke Chen 
Last updated 1997-01-03
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The number of organizations that have more than one Internet connection is increasing significantly with time. In a substantial number of these cases, an organization's multiple connections are from the same ISP; this type of multi-homing is localized to the organization and its single provider, so a globally unique ASN should not be needed. However, many ISPs can only support their customers' reliability and load-sharing requirements by using BGP, which DOES require an ASN. Since the needs of the ISP and its multi-homed customer are contrary to the Internet's need to allocate the ASN space sensibly, this is a problem. A solution to this problem has been proposed which makes use of private ASNs, but it has several disadvantages. This paper documents the existing solution and describes its disadvantages, then presents another solution which doesn't share the same disadvantages.


John Stewart (
Enke Chen (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)