Broadcast New Node Connected and Disconnected
Original Publication Date: 1988-Nov-01
Included in the Prior Art Database: 2005-Feb-15
This article describes techniques in a ring network for adding a node and deleting one which has been disconnected or has failed. In a local area network such as the one disclosed on pages 166-169 of this issue, when a node powers up and comes on line in the ring, it is necessary to notify all active nodes and to receive acknowledgement from each one. Further, it is important to provide early indication to all nodes when any one node goes down and to receive acknowledgement from all nodes. A restricted broadcast command is defined which identifies a node that has just come on line and been assigned an address. The frame contains the node's address and parameters to identify the node. Each node receiving turns on its corresponding positive acknowledgement and retransmits.