International Business Machines Corporation

Mary Ellen Carollo

Angelo Macchiano

Susan Marie Farrell

Richard P Tarcza

Bruce H Ratcliff

Dennis Ray Musselwhite

Tracy Jo Adams

Brian K Wade

Kevin Scott Adams

Donald P Wilton

Joseph Michael Hust

A first component of a computing environment receives, from a physical network adapter of the computing environment, a request that the first component take over processing of network frames directed to network frame address(es) associated with a second component of the computing environment. The first component register the network frame address(es) for processing of network frames directed to the network frame address(es). Based on the first component receiving from the physical network adapter a network frame directed to a network frame address of the network frame address(es) associated with the second component, the first component processes the received network frame, in which the network frame is provided to the second component via an inter-component link between the first component and the second component.

Take-over of network frame handling in a computing environment

Virtual switches are established in a host system of a computing environment. Each virtual switch of the virtual switches includes a respective virtual switch port grouped within a shared port group of virtual switch ports. The virtual switch ports of the shared port group are in communication with a common physical network adapter of the host system. The virtual switch ports of the shared port group share a single physical port of the physical network adapter as part of a common physical link aggregation group (LAG).

Physical port sharing in a link aggregation group

Data processing system efficiency is improved by automatically determining whether to adjust for a next time interval a number N of processors running within the system for processing a workload. The automatically determining includes obtaining a measure of operating system overhead by evaluating one or more characteristics of processor time of the N processors consumed within the system for a time interval, and obtaining a measure of system utilization of the N processors running within the system for processing the workload for the time interval. The automatically determining further includes automatically ascertaining whether to adjust the number N of processors running within the system for the next time interval to improve system efficiency using the obtained measure of operating system overhead and the obtained measure of system utilization of the N processors.

System overhead-based automatic adjusting of number of running processors within a system

A method for communicating from a first virtual machine, defined by a virtual machine operating system, to an external device via a local area network (LAN). The virtual machine operating system also defines other virtual machines and a base portion common to all of the virtual machines. The first virtual machine writes an IP datagram to an output buffer allocated to the first virtual machine. The IP datagram comprises data and a destination IP address associated with the external device. The program functions in the base portion read the IP datagram from the output buffer to determine the destination IP address and then copy the IP datagram from the output buffer into storage allocated to the common base portion whereby the IP datagram passes from the first virtual machine into the common base portion storage without passing through any other virtual machines. Then, the program functions request a tangible adapter card for the network to send the IP datagram to the IP destination address.

Virtual machine connection to a tangible network

A system and method of managing networks and, more particularly, to a system and method for interfacing with virtual networking devices using SNMP (Simple Network Management Protocol). A system comprises a configuration statement configured to provide an identity to a virtual device. An SNMP subagent is configured to interface between an SNMP agent and a control program of the virtual device. The SNMP subagent acquires information extracted by the control program for the identified virtual device and provides the acquired information to the SNMP agent to be returned to the SNMP client.

System and method for providing SNMP data for virtual networking devices

A method, system and program product for managing assignment of virtual physical addresses. The method includes requesting, using a services function provided by a virtual machine operating system, a MAC address assignment for a real device and searching, in a MAC assignment table created and stored within a virtual memory space, to determine whether or not an explicit MAC address is assigned to the device. If an explicit MAC address is determined to be assigned to the device, retrieving the explicit MAC address upon verifying that the MAC address is not in use by another device and forwarding, using the services function, the explicit MAC address retrieved for assignment to the real device. If an explicit MAC address is not assigned to the device, retrieving an available MAC address from a MAC address pool table and forwarding the available MAC address retrieved for assignment to the real device.

Method, system and program product for managing assignment of MAC addresses in a virtual machine environment

Virtual machine communicating to external device without going through other virtual machines by using a list of IP addresses managed only by a single virtual machine monitor

Growing community of inventors

Ithaca, NY, United States of America

Mary Ellen Carollo