RFC 2770 (rfc2770) - Page 3 of 5

GLOP Addressing in 233/8

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RFC 2770                GLOP Addressing in 233/8           February 2000


4. Transition from GLOP to Other Address Allocation Schemes

   It may not be necessary to transition from the address allocation
   scheme described here to a more dynamic approach (see, e.g., [MASC]).
   The reasoning here is that the statically assigned addresses taken
   from 233/8 may be sufficient for those applications which must have
   static addressing, and any other addressing can come from either a
   dynamic mechanism such as [MASC], the administratively scoped address
   space [RFC 2365], or the Single-source address space [SS].

5. Security Considerations

   The approach described here may have the effect of reduced exposure
   to denial of space attacks based on dynamic allocation. Further,
   since dynamic assignment does not cross domain boundaries, well known
   intra-domain security techniques can be applied.

6. IANA Considerations

   IANA has allocated 233/8 for experimental assignments. This
   assignment should timeout one year after the assignment is made. The
   assignment may be renewed at that time. It should be noted that the
   experiment described here is in the same spirit the experiment
   described in [RFC 1797].

7. Acknowledgments

   This idea originated with Peter Lothberg's idea that we use the same
   allocation (AS based) as described in RFC 1797 in the class D address
   space. Randy Bush and Mark Handley contributed many insightful
   comments.

8. References

   [RFC 2730] Hanna, S., Patel, B. and M. Shah, "Multicast Address
             Dynamic Client Allocation Protocol (MADCAP)", RFC 2730,
             December 1999.

   [MASC]    D. Estrin, et al., "The Multicast Address-Set Claim (MASC)
             Protocol", Work in Progress.

   [MSDP]    D. Farinacci et al., "Multicast Source Discovery Protocol
             (MSDP)", Work in Progress.

   [IANA]    www.isi.edu/in-notes/iana/assignments/multicast-addresses






Meyer & Lothberg              Experimental
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