Diagnostic Responses for Session Initiation Protocol Hop Limit Errors

Document Type Expired Internet-Draft (sip WG)
Author Scott Lawrence 
Last updated 2006-06-19 (latest revision 2006-06-02)
Stream Internet Engineering Task Force (IETF)
Expired & archived
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Stream WG state WG Document
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The Session Initiation Protocol (SIP) imposes a limit on the number of hops a request can transit on the way to its destination. When this limit is reached, a 483 (Too Many Hops) error response is returned. The present form of the 483 response does not provide enough information for the UAC or proxy on the path to diagnose failures whose symptom is that the hop limit is reached. This document specifies additional diagnostic information to be returned in a 483 response.


Scott Lawrence (slawrence@pingtel.com)

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