Fast service restoration for lost IGMP leave requests
First Claim
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1. A method of managing IP multicast connections in a network having a network node and a plurality of end users, said method comprising the steps of (a) receiving, at a network node an IGMP Group Join message from an end-user device serviced by the network;
- (b) comparing, at the network node, a MAC address, obtained from the Join message, of the end-user device to another MAC address obtained from a previous Join message for which there exists an IP multicast connection to the network node;
(c) initiating, by the network node responsive to a match resulting from the comparison, a GSQ for the group of the matching previous Join request; and
(d) terminating, responsive to a result of the GSQ processing indicating that a connection to the group is no longer needed, the connection to the group.
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Abstract
A fast service restoration for a lost IGMP Leave request. The network node does a comparison to determine if Leave messages are lost in transmission from an end-user system to a supporting network node.
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Citations
6 Claims
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1. A method of managing IP multicast connections in a network having a network node and a plurality of end users, said method comprising the steps of
(a) receiving, at a network node an IGMP Group Join message from an end-user device serviced by the network; -
(b) comparing, at the network node, a MAC address, obtained from the Join message, of the end-user device to another MAC address obtained from a previous Join message for which there exists an IP multicast connection to the network node;
(c) initiating, by the network node responsive to a match resulting from the comparison, a GSQ for the group of the matching previous Join request; and
(d) terminating, responsive to a result of the GSQ processing indicating that a connection to the group is no longer needed, the connection to the group. - View Dependent Claims (2, 3)
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- 4. In a data communications network having one or more network nodes, said one or more network nodes including digital subscriber line access multiplexers, said network implementing the internet group management protocol (IGMP), said one or more network nodes having means for receiving an IGMF Group Join message from an end-user serviced by said network and comparing the MAC address contained in said Join message of an end-user device to another MAC address obtained from a previous Join message, said network node initiating a group specific query (GSQ) with a group of the matching previous Join requests and said network node terminating the connection to the group in response to the GSQ indicating that a connection to the group is no longer needed.
Specification