Multicast registration of all multicast flows in an asynchronous transfer mode based emulated LAN
First Claim
1. In an Asynchronous Transfer Mode (ATM) based Emulated LAN (ELAN) including LAN Emulation Server (LES) and Selective Multicast Service (SMS) LE Services and one or more LE Clients (LECs), a method of multicast registration, said method comprising the steps of:
- generating a register request message comprising an indication that a requesting LEC desires to receive all multicast flows in said ELAN;
communicating said request to receive all multicast flows to all SMS entities in said ELAN; and
adding said requesting LEC to all multicast forward groups in each SMS entity so as to cause all multicast flows in said ELAN to be received by said requesting LEC.
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Accused Products
Abstract
An apparatus for and a method of implementing multicast registration in an ATM based ELAN. The present invention provides a mechanism for a LEC to register to receive all multicast group traffic flows without requiring the LEC to generate a separate request for each multicast MAC address. The mechanism of the present invention provides means for a LEC to register to receive all multicast flows by defining an ‘all_multicast’ TLV and including this TLV in the LE_REGISTER_REQUEST request message sent by the LEC. The LEC, LES and SMS are modified to perform the multicast registration/unregistration method of the present invention. The LEC generates the LE_REGISTER_REQUEST message and includes the all_multicast TLV indicating that the LEC desires to receive all multicast traffic flows in the ELAN. The LES, upon receipt of such an all_multicast TLV, adds the LEC to its list of LECs to receive all multicast traffic and communicates the related information to the SMS. The SMS is adapted to add the LEC to each of the multicast groups currently maintained by the SMS. A similar symmetric process occurs in the event a LEC wishes to stop receiving all multicast traffic.
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Citations
28 Claims
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1. In an Asynchronous Transfer Mode (ATM) based Emulated LAN (ELAN) including LAN Emulation Server (LES) and Selective Multicast Service (SMS) LE Services and one or more LE Clients (LECs), a method of multicast registration, said method comprising the steps of:
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generating a register request message comprising an indication that a requesting LEC desires to receive all multicast flows in said ELAN;
communicating said request to receive all multicast flows to all SMS entities in said ELAN; and
adding said requesting LEC to all multicast forward groups in each SMS entity so as to cause all multicast flows in said ELAN to be received by said requesting LEC. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. In an Asynchronous Transfer Mode (ATM) based Emulated LAN (ELAN) including LAN Emulation Server (LES) and Selective Multicast Service (SMS) LE Services and one or more LE Clients (LECs), a method of multicast unregistration, said method comprising the steps of:
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generating an unregister request message comprising an indication that a requesting LEC desires to stop receiving all multicast flows in said ELAN;
communicating said request to stop receiving all multicast flows to all SMS entities in said ELAN; and
removing said requesting LEC from all multicast forward groups in each SMS entity so as to cause all multicast flows in said ELAN to stop being received by said requesting LEC. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification