Capabilities Negotiation with BGP-4

Document Type Expired Internet-Draft (individual)
Authors John Scudder  , Ravi Chandra 
Last updated 1997-07-17
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Currently BGP-4 [BGP-4] requires that when a BGP speaker receives an OPEN message with one or more unrecognized Optional Parameters, the speaker must terminate BGP peering. This complicates introduction of new capabilities in BGP. This document defines new Optional Parameter, called Capabilities, that is expected to facilitate introduction of new capabilities in BGP by providing graceful capability negotiation. The proposed parameter is backward compatible - a router that supports the parameter can maintain BGP peering with a router that doesn't support the parameter.


John Scudder (
Ravi Chandra (

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