US 2008/0291931 A1Published application

System for broadcasting between subnetworks connected via a router

AssigneeInternational Business Machines Corporation

InventorHidekazu Fukuda

Life of this patent

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Abstract

The present invention allows the contents of network-wide broadcast in a first subnetwork to be passed to a second subnetwork even if a router is set to prevent the network-wide broadcast in the first subnetwork from going out of the first subnetwork. In response to the network-wide broadcast in the first subnetwork, a first broadcast relay generates a packet in which a destination address of the network-wide broadcast packet is changed to an address of a second broadcast relay belonging to a second subnetwork, and outputs the address changed packet to the first subnetwork. The second broadcast relay generates, in response to the packet addressed thereto, a second subnetwork-only broadcast as a local broadcast, and outputs it to the second subnetwork. A server of the second subnetwork performs a predetermined process on the broadcast outputted by the second broadcast relay.

Claims8

Dependent claims

A broadcast processing system comprising:

a first subnetwork comprising a first device and a first broadcast relay;
a router in communication with the first subnetwork;
and
a second subnetwork different from the first subnetwork and in communication with the router, the second subnetwork comprising a second device and a second broadcast relay;
wherein the router is configured to prevent a first subnetwork network wide broadcast packet from the first subnetwork from reaching the second subnetwork;
wherein the first broadcast relay is configured to detect a first subnetwork network wide broadcast packet from the first device in the first subnetwork, and in response to the detected packet having a first subnetwork network-wide destination address, a broadcast host address and a destination port number, generate a unicast address changed packet from the detected packet by changing the network wide destination address to a unicast address of the second broadcast relay in the second subnetwork, and output said unicast address changed packet through the router to the second broadcast relay;
wherein the second broadcast relay is configured to receive in said second subnetwork the unicast address changed packet addressed to said second receiving broadcast relay, generate a second subnetwork-type broadcast packet by changing the destination unicast address of the packet received by said second receiving broadcast relay to an address related to a second subnetwork-type broadcast, and output said generated second subnetwork-type broadcast packet inside said second subnetwork;
and
wherein the second subnetwork second device is configured to receive the second subnetwork-type broadcast packet, check a port number of a protocol segment of the received second subnetwork-type broadcast packet, and perform a predetermined process if the port number corresponds to a process of the second device or take no action if the port number does not correspond to a process of the second device.

6 more elements

An article of manufacture comprising a computer readable medium, the computer readable medium comprising computer executable program code, wherein the program code, when deployed and executed on a computer system, causes the computer system to:

in response to detecting a first subnetwork network wide broadcast packet in a first subnetwork, the packet having a first subnetwork network-wide destination address, a broadcast host address and a destination port number, generate a unicast address changed packet from the detected packet by changing the network wide destination address to a unicast address of a second broadcast relay in the second subnetwork;
output said unicast address changed packet through a router to the second broadcast relay, the router configured to prevent the first subnetwork network wide broadcast packet from reaching the second subnetwork;
cause the second broadcast relay to generate a second subnetwork-type broadcast packet by changing the destination unicast address of the unicast address changed packet to an address related to a second subnetwork-type broadcast in said second subnetwork;
cause the second broadcast relay to output said generated second subnetwork-type broadcast packet inside said second subnetwork;
and
cause the second device on the second subnetwork to receive the second subnetwork-type broadcast packet, check a port number of a protocol segment of the second subnetwork-type broadcast packet;
and perform a predetermined process if the port number corresponds to a process of the second device or take no action if the port number does not correspond to a process of the second device.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/174,750Filed 22 Jul 2008
Priority: JP 2003-06772513 Mar 2003
Published: 27 Nov 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H04L 45/02
Routing or path finding of packets in data switching networks: topology update or discovery
H04L 12/1886
For broadcast or conference , e.g. multicast: with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
H04L 49/201
Support for services: multicast operation; Broadcast operation
H04L 63/10
Network architectures or network communication protocols for network security: for controlling access to devices or network resources

Family

Application10/795,949Continuation · filed 8 Mar 2004
Application12/174,750Continuation
US 2004/0208189 A1Published application
US 7,408,934 B2Related patent
US 7,881,300 B2Related patent
US 2008/0291931 A1This patent

From the US filing history. Foreign family members aren’t listed.