''shared-mtrace'': A Multicast 'traceroute' facility for Shared Trees

Document Type Expired Internet-Draft (individual)
Author Anthony Ballardie 
Last updated 1997-10-27
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


''mtrace'' [1] is a very useful tool for diagnosing IP multicast rout- ing problems, such as multicast routing loops and misconfigured mul- ticast routers, associated with source-rooted RPF-based distribution trees. For ''mtrace'' to be useful in a shared tree environment (e.g. PIM [2], CBT [3], GUM [4]) its behaviour must be modified. This draft speci- fies that behaviour, which is sufficiently general to be applicable to all shared tree types and operating modes. A new ''wildcard'' mode of behaviour is also described, which allows a trace of a complete shared tree. Authentication is recommended in this mode because of its potential as a vehicle for denial of service attacks. It is intended that this draft become a document of the Mbone Deploy- ment (mboned) working group of the IETF. Therefore, comments are solicited and should be sent to mboned's mailing list <mboned@network- services.uoregon.edu> and/or the author.


Anthony Ballardie (ABallardie@acm.org)

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