Hewlett-packard Development Company, L.P.

International Business Machines Corporation

Michael Sean McIntyre

Michael Sean McGee

Mark Christopher Stratton

Gregory Thomas Howard

Charles A Musta

Mark Richard Enstone

Christopher L Hughes

Brice A Bartek

Michel Sean McGee

A computer system automatically recovers from a split segment condition in which a contiguous layer 2 network segment, comprising a plurality of contiguous paths each directly coupling one or more members of a team of network resources of the computer system to a core switch of a layer 2 network, is split into two or more noncontiguous segments each comprising a contiguous set of one or more of the plurality of paths. The computer system includes a team of network resources having one or more members that couple it to each one of the plurality of paths. A teaming driver binds the drivers of each member of the team and is coupled to the segment through the members of the team. The teaming driver detects whenever the network segment has been split into two or more noncontiguous segments and then configures the team such that one of the members coupled to a path within each of the noncontiguous segments is designated as a primary resource thereby restoring connectivity of the isolated paths to the computer system.

Automated recovery from a split segment condition in a layer2 network for teamed network resources of a computer system

A method for monitoring network connectivity. The method may include the act of transmitting a respective request packet from a network interface card (NIC) of a plurality of NICs in a NIC team to an external network device. The method may also include the act of receiving a respective response packet from the external network device at each respective NIC from which a respective request packet was received by the external network device.

Method and system for monitoring network connectivity

A network controller system comprising a plurality of network ports and a driver system that operates the plurality of network ports. The driver system determines which of the network ports can be combined together to form a team. Each network port in the team is associated with a different network interface card (NIC). The NICs are associated with a common network address to be used by external network logic.

Network controller

In a computer network having a plurality of nodes with one or more computer systems associated with a node a method for transmitting messages to and from a DOS application resident in a memory to and from the network. The messages to and from the DOS application are handled a virtual device driver resident in the memory which is monitoring the 5C interrupt. The virtual device driver converts an outgoing CCB1 message from the DOS application to a message in a CCB3 32-bit format and an incoming 32-bit CCB3 message to a CCB1 format. The virtual device driver transmits the CCB3 message to a physical device driver resident in system memory. The physical device converts messages between the CCB3 32-bit format and a CCB3 16-bit format. The physical device driver transmits and receives 16-bit CCB3 messages to and from a logical link control protocol driver resident in the memory. The logical link control protocol driver is preferably written to the ISO 8802-2 standards and passes and receives messages to and from the MAC layer and the LAN adapter. With an incoming message the virtual device driver arms a context hook which fires when the operating system has allocated sufficient memory to the DOS application resident Virtual 86 mode before transmitting the CCB1 message to the DOS application.

Growing community of inventors

Austin, TX, United States of America

Michael Sean McIntyre