Internet protocol assists for high performance LAN connections

• US 5,999,974 A
• Filed: 08/29/1997
• Issued: 12/07/1999
• Est. Priority Date: 08/29/1997
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Ratcliff, Bruce H., Valley, Stephen R.
• Primary Examiner(s): Burgess, Glenton B.
• Assistant Examiner(s): HO, CHUONG T
• Application Number:
  US08/921,432
• Time in Patent Office: 830 Days
• Field of Search: 395/200.54, 395/200.66, 370/257, 370/402, 370/338, 370/60, 370/252, 370/254, 709/220-226
• US Class Current: 709/224
• CPC Class Codes: H04L 41/0803 Configuration setting
• CPC Class Codes: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 61/10 of different types
• CPC Class Codes: H04L 61/50 Address allocation

Abstract

A method of dynamically configuring and monitoring every host connected to a gateway device, where at least one initiating host and one receiving host is at least connected to the gateway device in a computing network environment. All information about all connected hosts and their addresses are first determined and stored in a port-sharing table in a memory location accessible to the gateway device. The availability of each host connection is monitored and checked at preselected intervals and if any host becomes unavailable, a change in status is made in the portsharing table. When a special IP address command is issued for a particular initiating host, such as a SET IP address command, all IP datagrams for that particular host is received and in turn compared to the entries in the portsharing table. In case a match is not found between the received IP datagram of the particular initiating host and the entries in the portsharing table, a new entry is made in the portsharing table containing the information of the particular initiating host.

Claims

1. In a computing network environment having a gateway device and having at least one initiating host and at least one receiving host electronically connected to said gateway device, a method of dynamically configuring and monitoring hosts electronically connected to said gateway device, said method comprising steps of:

performing an initialization step during which IP addresses of hosts connected to said gateway device are determined using handshaking techniques;

forming a port-sharing table and storing said table in a memory location accessible to said gateway device;

checking a host connection to ensure connection status availability;

making necessary changes in said port-sharing table to reflect if any of said connections are no longer active or available based on said checking;

receiving IP datagrams and configuration information relating to a particular initiating host upon the gateway device receiving a special IP address command from said particular initiating host;

comparing said IP datagrams for said particular initiating host with said IP addresses and other information previously stored in said port-sharing table; and

adding said information relating to said particular initiating host to said port-sharing table in case a complete match is not found between said IP datagrams and configuration information of said particular initiating host and said IP address and other information previously stored in said port-sharing table.

2. The method of claim 1, wherein said at least one receiving host is electronically connected to said gateway device through at least one local area network and said special IP address command is a SET IP ADDRESS command.

3. The method of claim 2, wherein said SET IP ADDRESS command is issued when a first initiating host is communicating with a first receiving host.

4. The method of claim 3 wherein upon receiving said SET IP ADDRESS command port number, IP address and subnet mask information of said particular initiating host is obtained by said gateway device and added to said port-sharing table if not already stored in said port-sharing table.

5. The method of claim 4 wherein before establishing communication between said first initiating host and said first receiving host, Maximum Transmission Unit (MTU) size allowable is checked for said first initiating host.

6. The method of claim 1, wherein said gateway device has an associated communication platform and said platform is a channel attached platform.

7. The method of claim 1, wherein said gateway device has an associated communication platform and said platform is an integrated platform.

8. The method of claim 7, wherein said associated communication platform is an open systems adapter platform.

9. The method of claim 1, wherein said computing network environment uses TCP/IP communication protocol.

10. The method of claim 1, wherein said computing network environment uses UDP/IP communication protocol.

11. The method of claim 1, wherein said computing network environment uses a platform communication protocol, and said protocol is LAN Channel Station (LCS) interface protocol.

12. The method of claim 1, wherein said computing network environment uses VTAM communication protocol.

13. The method of claim 1, wherein said computing network environment uses MVS operating system.

14. The method of claim 1, wherein said gateway device is electronically connected to a plurality of local area networks.

15. The method of claim 14, wherein each of said plurality of local area networks is of a different type and different and independent communication platform.

16. The method of claim 1, wherein said gateway device is electrically connected to at least one wide area network.