A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching Working Group of the 
IETF.

        Title           : Encapsulating MPLS in IP or GRE
        Author(s)       : T. Worster, Y. Rekhter, E. Rosen
        Filename        : draft-ietf-mpls-in-ip-or-gre-00.txt
        Pages           : 7
        Date            : 2003-1-14
        
In various applications of MPLS, label stacks with multiple entries
are used.  In some cases, it is possible to replace the top label of
the stack with an IP-based encapsulation, thereby enabling the
application to run over networks which do not have MPLS enabled in
their core routers.  This draft specifies two IP-based
encapsulations, MPLS-in-IP, and MPLS-in-GRE.  Each of these is
applicable in some circumstances.

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