Virtual internet protocol (IP) addressing

• US 5,923,854 A
• Filed: 11/22/1996
• Issued: 07/13/1999
• Est. Priority Date: 11/22/1996
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Bell, Jon Anthony, Britton, Edward Glen
• Primary Examiner(s): Rinehart, Mark H.
• Application Number:
  US08/755,420
• Time in Patent Office: 963 Days
• Field of Search: 395/500, 395/200.01, 395/200.76, 395/200.5, 395/200.51, 395/200.75, 395/200.8, 395/200.73, 370/397, 370/399, 370/409
• US Class Current: 709/243
• CPC Class Codes: H04L 61/10 of different types
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 61/5046 Resolving address allocation conflicts; Testing of addresses testing when self-assigning an address H04L61/5092
• CPC Class Codes: H04L 61/5076 Update or notification mechanisms, e.g. DynDNS
• CPC Class Codes: H04L 69/40 for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection management of faults, events, alarms or notifications in data switching networks H04L41/06
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

In a telecommunications system containing a host computer and multiple real connections to the telecommunications network, an apparatus, method and system for allowing transmission to the host computer to reroute dynamically through the multiple available real connections to the host without requiring changes to the devices connecting to the host.

Claims

1. A host computer connected to a communications network, said host containing two or more network interface adapters, each of said network interface adapters having a unique physical address assigned, said network interface adapters connecting said host computer to said communications network wherein information may be dynamically rerouted through any of said two or more network interface adapters onto said communications network, said dynamic rerouting comprising the steps of:

creating a virtual IP interface adapter for said host wherein said virtual IP interface adapter is recognized as being continuously operational;

allocating a virtual IP address for said virtual IP interface adapter; and

,

replacing each of said physical addresses of said network interface adapter with said virtual IP address in all routing advertisements utilizing existing routing protocols to dynamically reroute said information.

2. A host computer as claimed in claim 1 wherein each of said physical addresses is replaced with said virtual IP address in outgoing data blocks.

3. A host computer as claimed in either of claims 1 or 2 wherein the communications protocol being used is TCP.

4. A host computer as claimed in either of claims 1 or 2 wherein the communications protocol being used is Internet Control Message Protocol (ICMP).

5. A host computer as claimed in either of claims 1 or 2 wherein the communications protocol being used is User Datagram Protocol (UDP) but not Routing Information Protocol (RIP).

6. A host computer as claimed in either of claims 1 or 2 wherein two or more virtual IP addresses are assigned to said host.

7. A method for connecting host computer to a communications network, said host containing two or more network interface adapters, each of said network interface adapters having a unique physical address assigned, said network interface adapters connecting said host computer to said communications network wherein information may be dynamically rerouted through any of said two or more network interface adapters onto said communications network, said dynamic rerouting comprising:

means for creating a virtual IP interface adapter for said host;

means for allocating a virtual IP address for said virtual IP interface adapter wherein said virtual IP interface adapters are recognized as being continuously operational; and

,

means for replacing each of said physical addresses of said network interface adapter with said virtual IP address in all routing advertisements utilizing existing routing protocols to dynamically reroute said information.

8. A method as claimed in claim 7 wherein each of said physical addresses is replaced with said virtual IP address in outgoing data blocks.

9. A method as claimed in either of claims 7 or 8 wherein the communications protocol being used is TCP.

10. A method as claimed in either of claims 7 or 8 wherein the communications protocol being used is Internet Control Message Protocol (ICMP).

11. A method as claimed in either of claims 7 or 8 wherein the communications protocol being used is User Datagram Protocol (UDP) and not Routing Information Protocol (RIP).

12. A method as claimed in either of claims 7 or 8 wherein two or more virtual IP addresses are assigned to said host.

13. A media containing programmable code for execution on a host computer connected to a communications network, said host containing two or more network interface adapters, each of said network interface adapters having a unique physical address assigned, said network interface adapters connecting said host computer to said communications network wherein information may be dynamically rerouted through any of said two or more network interface adapters onto said communications network, said dynamic rerouting comprising the steps of:

programmable means for creating a virtual IP interface adapter for said host;

programmable means for allocating a virtual IP address for said virtual IP interface adapter wherein said virtual IP interface adapters are recognized as being continuously operational; and

,

programmable means for replacing each of said physical addresses of said network interface adapter with said virtual IP address in all routing advertisements utilizing existing routing protocols to dynamically reroute said information.

14. A media containing programmable code as claimed in claim 13 wherein each of said physical addresses is programmably replaced with said virtual IP address in outgoing data blocks.

15. A media containing programmable code as claimed in either of claims 13 or 14 wherein the communications protocol being used is TCP.

16. A media containing programmable code as claimed in either of claims 13 or 14 wherein the communications protocol being used is Internet Control Message Protocol (ICMP).

17. A media containing programmable code as claimed in either of claims 13 or 14 wherein the communications protocol being used is User Datagram Protocol (UDP) and not Routing Information Protocol (RIP).

18. A media containing programmable code as claimed in either of claims 13 or 14 wherein two or more virtual IP addresses are assigned to said host.