Multicast Group Management July 2001 Multicast Group Management Srinivas Kandala Sharp Laboratories of America, Inc. Camas, WA E-Mail: srini@sharplabs.com Srinivas Kandala,Sharp Laboratories

Multicast Group Management (Method 1) July 2001 Multicast Group Management (Method 1) Multicast groups are managed by IEEE 802.1D defined GMRP. GMRP is an extensive bridge protocol, but can be used in a simplified mode. The usage of the GARP frames ensures interoperability. The AP shall have the GMRP registrar. The source shall have the GARP application entity running as a full applicant. The source assigns the multicast address and registers them with the Registrar in the AP . AP propagates the registration information through broadcast. The receivers may implement “Applicant only” or “Simple Applicant” participants. Srinivas Kandala,Sharp Laboratories

Multicast Group Management (Method 2) July 2001 Multicast Group Management (Method 2) The source generates the multicast address. Maintains a register for all the addresses it has generated. Adds a receiver to the multicast address when a request for data is received and updates its register. The multicast address would be propagated by a periodic broadcast message (AP may need to act as a repeater). Deletes a receiver from the address table if there is no acknowledgement from the receiver (ACK or the delayed ACK) for a certain duration. May also delete a receiver upon a request from the ESTA to stop sending the data. Distributed maintenance. If delayed ACK is desired, a FILTER_SPEC would be needed to allow the HC to merge all requests. Srinivas Kandala,Sharp Laboratories

July 2001 Method 1 Vs Method 2 Srinivas Kandala,Sharp Laboratories