IP multicast interface

• US 6,490,285 B2
• Filed: 08/25/1998
• Issued: 12/03/2002
• Est. Priority Date: 08/25/1998
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Ratcliff, Bruce H., Valley, Stephen R., Lee, Chin
• Primary Examiner(s): Yao, Kwang Bin
• Application Number:
  US09/139,948
• Publication Number:
  US 20020075878A1
• Time in Patent Office: 1,561 Days
• Field of Search: 370/390, 370/392, 370/393, 370/395, 370/397, 370/399, 370/401, 370/409, 370/432, 370/469, 370/471, 370/255, 370/395.1, 370/395.2, 370/395.3, 370/395.31, 709/232, 709/236, 709/238, 709/242, 709/245
• US Class Current: 370/395.31
• CPC Class Codes: H04L 12/1836 with heterogeneous network architecture
• CPC Class Codes: H04L 12/185 with management of multicast group membership

Abstract

A multicasting apparatus that broadcasts messages to at least some of the clients in a computing network environment having a plurality of clients and at least one host connected to these clients via a gateway device. A multicast routing table is created for registering any host and clients requesting registration. The table will include one entry per host/client and includes their relevant information. A connectivity platform is used for controlling all communications so that all information packets is first received by the platform. Upon the receipt of a packet, the table is searched and if an match is found the packet will be routed using the entry information; otherwise, the packet will be dropped.

Claims

1. In a computing network environment having a gateway device and having at least one host having multiple images and a plurality of clients connected to a local area network (LAN), said host and said clients being in processing communication with one another via said gateway device, a multicasting apparatus that broadcasts messages to at least some of said clients, said multicasting apparatus comprising:

a multicast routing table for registering any host image and clients requesting registration by obtaining their relevant information including any information needed for routing messages to that host image or client;

said multicast routing table have corresponding entries for host images where data is stored;

a connectivity platform used for controlling communication between said host and said client(s) via said LAN so that information packets are first received by said platform, said connectivity platform having one port connected to said LAN and an interface for sending messages to and receiving messages from multiple host images of said host;

searching means for finding corresponding matches in said routing table every time an information package is received;

routing means for routing any information packet received to its appropriate owner once a match is found in said multicast routing table; and

said routing means dropping said information packet if no corresponding match is found in said routing table.

2. The apparatus of claim 1, wherein said host comprises of a plurality of servers, said servers being in charge of sending and receiving data packets.

3. The apparatus of claim 2, wherein said host is apportioned into virtual computers each representing a distinct sub-environment.

4. The apparatus of claim 3 wherein at least one server is dedicated to each sub-environment.

5. The apparatus of claim 4 wherein a plurality of servers are dedicated to each sub-environment.

6. The apparatus of claim 3 wherein a separate entry is made in said routing table for each server.

7. The apparatus of claim 6, wherein said every time a client or a host is added to said environment, said host or client have to register.

8. The apparatus of claim 7, wherein a corresponding entry will be made in said routing table every time a new host or client registers with said environment.

9. The apparatus of claim 6, wherein any host or client can un-register with said environment.

10. The apparatus of claim 9, wherein said corresponding entry will be removed from said routing table once any host or client has unregistered from said environment.

11. The apparatus of claim 3 wherein a separate entry is made in said routing table for each server or servers belonging to separate sub-environments.

12. The apparatus of claim 1, wherein said every time a client or a host is added to said environment, said host or client have to register.

13. The apparatus of claim 8, wherein a corresponding entry will be made in said routing table every time a new host or client registers with said environment.

14. The apparatus of claim 13, wherein any host or client can un-register with said environment.

15. The apparatus of claim 14, wherein said corresponding entry will be removed from said routing table once any host or client has unregistered from said environment.

16. The apparatus of claim 1, wherein said a separate entry is made for computing environment uses TCP/IP communication protocol.

17. The apparatus of claim 1, wherein said platform is an Open System Adapter or OSA platform.

18. The apparatus of claim 1, wherein said gateway device is connected to a plurality of local area networks.

19. The apparatus of claim 18, wherein said local area networks each are of different types with different and independent communication platforms.

20. The apparatus of claim 19, wherein said gateway device is electrically connected to at least one wide area network.