The Multicast Address Dynamic Client Allocation Protocol (MADCAP) is a communication protocol that allows hosts to request multicast addresses from a server.[1][2][3]

Overview

The Multicast Address Dynamic Client Allocation Protocol (MADCAP) is designed to allow for automatic dynamic assignment of multicast addresses.[4]

MADCAP allows for efficient allocation of multicast addresses. This is important for IPv4 which has a small number of multicast addresses available. This is less of a concern with IPv6 multicast. Whereas IPv6 allows for 2112 possible multicast addresses, IPv4 multicast addresses are restricted to only class D Internet addresses (224.0.0.0/4).[5][6][4]

Port number 2535 is assigned by IANA for use with this protocol.[7] All protocol messages are encapsulated in UDP datagrams.[8] The MADCAP protocol has much in common with DHCP, but they are separate protocols with no common dependencies.[9]

History

MADCAP was originally based on DHCP.[9] Microsoft included MADCAP as part of the DHCP service in Windows 2000.[10] RFC 2730 was published as a proposed networking standard by the IETF in December 1999.[1] Guidelines for the allocation of IPv6 multicast addresses using MADCAP were published in RFC 3307 in August 2002.[11]

References

  1. 1 2 "RFC 2730". IETF. Retrieved 21 January 2018.
  2. ↑ "Windows 2000 DHCP". comptechdoc.org. Retrieved 21 January 2018.
  3. ↑ "Troubleshooting telephony in Windows 2000 Professional". TechRepublic (ZDNet/CBS Interactive).
  4. 1 2 Huggins, Diana (2003). Windows 2000 network infrastructure (2nd. ed.). Indianapolis, Ind.: Que. ISBN 0-7897-2863-X.
  5. ↑ "Windows Server 2008 R2 and Windows Server 2008". docs.microsoft.com. Microsoft. Retrieved 21 January 2018.
  6. ↑ "Configuring Multicast Scopes". serverbrain.org. Retrieved 21 January 2018.
  7. ↑ "Service Name and Transport Protocol Port Number Registry". IANA.org. Retrieved 21 January 2018.
  8. ↑ "RFC 2730 Section 1.5". IETF. Retrieved 21 January 2018.
  9. 1 2 "RFC 2730 Section 1.4". IETF. Retrieved 21 January 2018.
  10. ↑ Alcott, Neall (January 2001). DHCP for Windows 2000. O'Reilly Media, Inc. pp. Chapter 8. ISBN 1565928385.
  11. ↑ Haberman, B. "RFC 3307". IETF. Retrieved 21 January 2018.


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