Method and apparatus for maintaining network communications on a computer capable of connecting to a WAN and LAN

• US 5,659,685 A
• Filed: 12/13/1994
• Issued: 08/19/1997
• Est. Priority Date: 12/13/1994
• Status: Expired due to Term

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Schrier, Evan J., Williams, Robert J., Nicholson, Andrew L.
• Primary Examiner(s): Donaghue, Larry D.
• Assistant Examiner(s): Rinehart, Mark H.
• Application Number:
  US08/355,081
• Time in Patent Office: 980 Days
• Field of Search: 395/200.02, 395/200.06, 395/200.1, 395/200.12, 395/200.15, 395/284, 395/311, 370/85.13, 370/85.14, 364/514 C, 364/940.62, 364/940.64, 364/940.68
• US Class Current: 709/220
• CPC Class Codes: H04L 12/46 Interconnection of networks
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/24 Negotiation of communication capabilities
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

A method and apparatus are described for dynamically re-configuring bound adaptors on a networked computer capable of connecting to a plurality of networks via a plurality of adaptors including a WAN adaptor and a LAN adaptor. When a WAN link is activated by an incoming call, the networked computer is configured to be a router of packets between the WAN and LAN adaptors. When a WAN link is activated by an outgoing call, the networked computer logically disconnects from all adaptors except the activated WAN adaptor.

Claims

1. A method for dynamically configuring a networked computer supporting connections to a plurality of networks including at least one local area network (LAN) connection and a wide area network (WAN) connection, the method for dynamically configuring the networked computer comprising the steps of:

detecting, by the networked computer, an up WAN link to a remote networked computer;

determining an initiator of the up WAN link; and

configuring, by the networked computer, a set of network components of the networked computer, said configuring step comprising;

disconnecting existing logical network connections between the networked computer and all physically coupled networks except a network associated with the up WAN link in response to a determination, during the determining an initiator step, that the networked computer initiated the up WAN link; and

enabling routing of packets, by the networked computer, between at least the WAN link and a second connected network in response to a determination, during the determining an initiator step, that the remote networked computer initiated the up WAN link.

2. The method of claim 1 wherein the second connected network comprises a LAN.

3. The method of claim 1 wherein the networked computer comprises two or more bound LAN adaptors after the networked computer performs the enabling routing step, and wherein the enabling routing of packets includes enabling routing between two (2) LANs.

4. The method of claim 1 further comprising the steps of:

detecting deactivation of an up WAN link from a remote networked computer resulting in a down WAN link, and in response to the detecting deactivation step discontinuing routing, by the networked computer, of packets between adaptors bound to the networked computer.

5. The method of claim 4 wherein two or more LAN adaptors are bound to the networked computer when the networked computer performs the discontinuing routing step.

6. The method of claim 1 further comprising the step of:

commencing gathering, by the networked computer, of RIP information after binding of a network adaptor results in two (2) adaptors being bound to the networked computer.

7. The method of claim 6 further comprising the step of:

discontinuing gathering, by the networked computer, of RIP information after unbinding of a network adaptor results in one (1) adaptor being bound to the networked computer.

8. The method of claim 1 wherein the networked computer incorporates the IPX protocol.

9. The method of claim 1 wherein the networked computer comprises two or more bound LAN adaptors, the method further comprising the step of assigning, by the networked computer, default status to an adaptor of the two or more adaptors.

10. The method of claim 1 wherein the networked computer comprises a bound WAN adaptor and at least one bound LAN adaptor, the method further comprises the steps of:

assigning default adaptor status to a bound LAN adaptor; and

next assigning, by the networked computer, default adaptor status to the WAN adaptor in accordance with the disconnecting step.

11. The method of claim 10 further comprising the steps of:

next detecting, by the networked computer, a down WAN link associated with the WAN adaptor having default adaptor status; and

re-assigning default adaptor status from the WAN adaptor to a bound LAN adaptor in response to the next detecting step.

12. A networked computer for dynamically supporting connections to a plurality of networks including at least one local area network (LAN) connection and a wide area network (WAN) connection, the networked computer comprising:

a WAN adaptor connection controller for detecting an up WAN link to a remote networked computer;

means for determining an initiator of the up WAN link; and

means for configuring a set of network components of the networked computer, the means for configuring comprising;

means for disconnecting existing logical network connections between the networked computer and all physically coupled networks except a network associated with the up WAN link in response to a determination that the networked computer initiated the up WAN link; and

means for enabling routing of packets, by the networked computer, between at least the WAN link and a second connected network in response to a determination that the remote networked computer initiated the up WAN link.