Abstract: A system, and computer program product for leader device selection in a control cluster using a shared virtual local area network (VLAN) are provided in the illustrative embodiments. A broadcast Hello packet is received from a sender virtual device over the VLAN at a first virtual device. When the first virtual device satisfies a partnership criterion specified in the Hello packet, a first ranking of the first virtual device is evaluated to be higher than a ranking of a sender virtual device. A first Live packet is unicast over the VLAN to the sender virtual device and a leadership role in the control cluster is taken by the first virtual device. The sender virtual device is caused to stop a broadcasting operation at the sender virtual device. A second Hello packet is broadcasted from the first virtual device over the VLAN.

Abstract: At a first virtual device executing in a data processing system, a determination is made whether a partner list associated with the first virtual device includes a threshold number of partner virtual devices, the first virtual device participating in the control cluster. A first Live packet is unicast over the VLAN to each partner virtual device identified in the partner list. A unicast of a second Live packet from a second virtual device to the first virtual device is received over the VLAN, the second virtual device being identified in the partner list. A Hello packet is broadcast over the VLAN to cause the Hello packet to reach a third virtual device, wherein the Hello packet is configured to discover a new partner virtual device to add to the partner list, discovering the new partner enlarging the control cluster.

Abstract: At a first virtual device executing in a data processing system, a determination is made whether a partner list associated with the first virtual device includes a threshold number of partner virtual devices, the first virtual device participating in the control cluster. A first Live packet is unicast over the VLAN to each partner virtual device identified in the partner list. A unicast of a second Live packet from a second virtual device to the first virtual device is received over the VLAN, the second virtual device being identified in the partner list. A Hello packet is broadcast over the VLAN to cause the Hello packet to reach a third virtual device, wherein the Hello packet is configured to discover a new partner virtual device to add to the partner list, discovering the new partner enlarging the control cluster.

Abstract: A method for leader device selection in a control cluster using a shared virtual local area network (VLAN) is provided in the illustrative embodiments. A broadcast Hello packet is received from a sender virtual device over the VLAN at a first virtual device. When the first virtual device satisfies a partnership criterion specified in the Hello packet, a first ranking of the first virtual device is evaluated to be higher than a ranking of a sender virtual device. A first Live packet is unicast over the VLAN to the sender virtual device and a leadership role in the control cluster is taken by the first virtual device. The sender virtual device is caused to stop a broadcasting operation at the sender virtual device. A second Hello packet is broadcasted from the first virtual device over the VLAN.

Abstract: A system, and computer program product for leader device selection in a control cluster using a shared virtual local area network (VLAN) are provided in the illustrative embodiments. A broadcast Hello packet is received from a sender virtual device over the VLAN at a first virtual device. When the first virtual device satisfies a partnership criterion specified in the Hello packet, a first ranking of the first virtual device is evaluated to be higher than a ranking of a sender virtual device. A first Live packet is unicast over the VLAN to the sender virtual device and a leadership role in the control cluster is taken by the first virtual device. The sender virtual device is caused to stop a broadcasting operation at the sender virtual device. A second Hello packet is broadcasted from the first virtual device over the VLAN.

Abstract: A method for leader device selection in a control cluster using a shared virtual local area network (VLAN) is provided in the illustrative embodiments. A broadcast Hello packet is received from a sender virtual device over the VLAN at a first virtual device. When the first virtual device satisfies a partnership criterion specified in the Hello packet, a first ranking of the first virtual device is evaluated to be higher than a ranking of a sender virtual device. A first Live packet is unicast over the VLAN to the sender virtual device and a leadership role in the control cluster is taken by the first virtual device. The sender virtual device is caused to stop a broadcasting operation at the sender virtual device. A second Hello packet is broadcasted from the first virtual device over the VLAN.

Abstract: At a first virtual device executing in a data processing system, a determination is made whether a partner list associated with the first virtual device includes a threshold number of partner virtual devices, the first virtual device participating in the control cluster. A first Live packet is unicast over the VLAN to each partner virtual device identified in the partner list. A unicast of a second Live packet from a second virtual device to the first virtual device is received over the VLAN, the second virtual device being identified in the partner list. A Hello packet is broadcast over the VLAN to cause the Hello packet to reach a third virtual device, wherein the Hello packet is configured to discover a new partner virtual device to add to the partner list, discovering the new partner enlarging the control cluster.

Abstract: At a first virtual device executing in a data processing system, a determination is made whether a partner list associated with the first virtual device includes a threshold number of partner virtual devices, the first virtual device participating in the control cluster. A first Live packet is unicast over the VLAN to each partner virtual device identified in the partner list. A unicast of a second Live packet from a second virtual device to the first virtual device is received over the VLAN, the second virtual device being identified in the partner list. A Hello packet is broadcast over the VLAN to cause the Hello packet to reach a third virtual device, wherein the Hello packet is configured to discover a new partner virtual device to add to the partner list, discovering the new partner enlarging the control cluster.

Abstract: Provided are techniques for configuring a primary shared Ethernet adapter (SEA) and a backup SEA into a failover (F/O) protocol; providing a user interface (UI) for enabling a user to request a SEA load sharing protocol; in response to a user request for a SEA load sharing protocol, verifying that criteria for load sharing are satisfied; setting, by the UI a load sharing mode, comprising: requesting, by the backup SEA to the primary SEA, implementation of the SEA load sharing protocol; responsive to the requesting by the backup SEA, the primary SEA transmit an acknowledgment to the backup SEA and transitions into a sharing state; and responsive to the acknowledgment from the primary SEA, the backup SEA transitions to the sharing state.

Abstract: A method of dynamically changing an allocation of queue pair resources to an operating system image running in virtualized environment receives a notification at the operating system image of a change in allocation of queue pair resources to the operating system image. The method queries a physical network adapter through a hypervisor to obtain a new queue pair resource count that will exist in the virtualized system after the change in allocation. The method performs a hashing operation in the operating system image using the new queue pair resource count to distribute transmit traffic among the queue pair resources that will exist in the virtualized system after the change in allocation.

Abstract: A mechanism is provided to enhance the scalability of network caching capabilities. All network client applications running on a partition in a virtualized environment are configured to query information from a single virtual input/output server (VIOS) network caching daemon. Thus, the illustrative embodiments provide a 1:n model where a VIOS partition has a network caching daemon, and each of the n partitions uses the network caching daemon of the VIOS partition. The mechanism of the illustrative embodiments only requires the system administrator to control one copy of the local files on the VIOS server. The system administrator does not need to monitor all of these local files on each individual partition. The system administrator consolidates the entries used by the different individual partitions into one single file on the VIOS server side.

Abstract: A system receives a notification at an operating system image of a change in allocation of queue pair resources to the operating system image. The system queries a physical network adapter through a hypervisor to obtain a new queue pair resource count that will exist in the virtualized system after the change in allocation. The system performs a hashing operation in the operating system image using the new queue pair resource count to distribute transmit traffic among the queue pair resources that will exist in the virtualized system after the change in allocation.

Abstract: Provided are techniques for configuring a primary shared Ethernet adapter (SEA) and a backup SEA into a failover (F/O) protocol; providing a user interface (UI) for enabling a user to request a SEA load sharing protocol; in response to a user request for a SEA load sharing protocol, verifying that criteria for load sharing are satisfied; setting, by the UI a load sharing mode, comprising: requesting, by the backup SEA to the primary SEA, implementation of the SEA load sharing protocol; responsive to the requesting by the backup SEA, the primary SEA transmit an acknowledgment to the backup SEA and transitions into a sharing state; and responsive to the acknowledgment from the primary SEA, the backup SEA transitions to the sharing state.

Abstract: Disclosed is a computer implemented method and computer program product for transmitting a resource record to a requesting computer. An authoritative domain name server receives a DNS query from a requesting computer at a name server. The authoritative domain name server looks up the resource record based on the DNS query, wherein the resource record is associated with an epochal time and a time to live. The authoritative domain name server transmits the resource record response based on the epochal time.

Abstract: A method of dynamically changing an allocation of queue pair resources to an operating system image running in virtualized environment receives a notification at the operating system image of a change in allocation of queue pair resources to the operating system image. The method queries a physical network adapter through a hypervisor to obtain a new queue pair resource count that will exist in the virtualized system after the change in allocation. The method performs a hashing operation in the operating system image using the new queue pair resource count to distribute transmit traffic among the queue pair resources that will exist in the virtualized system after the change in allocation.

Abstract: A method of dynamically changing an allocation of queue pair resources to an operating system image running in virtualized environment receives a notification at the operating system image of a change in allocation of queue pair resources to the operating system image. The method queries a physical network adapter through a hypervisor to obtain a new queue pair resource count that will exist in the virtualized system after the change in allocation. The method performs a hashing operation in the operating system image using the new queue pair resource count to distribute transmit traffic among the queue pair resources that will exist in the virtualized system after the change in allocation.

Abstract: Methods, systems, and products are provided for tunneling IPv6 packets. Embodiments include receiving, by an origin IPv6 border router from an origin IPv6 host, an IPv6 packet having an IPv6 destination address; receiving, by an origin IPv6 border router from an origin IPv6 host, an IPv4 address for a destination IPv6 border router retrieved from a data structure associating IPv6 destination addresses with IPv4 addresses for destination IPv6 border routers; encapsulating, by the origin IPv6 border router, the IPv6 packet in an IPv4 packet; and sending the encapsulated packet to a destination IPv6 border router at the IPv4 address. In many embodiments, encapsulating, by the origin IPv6 border router, the IPv6 packet in an IPv4 packet is carried out by adding an IPv4 header to the IPv6 packet.

Abstract: Disclosed is a computer implemented method and computer program product for transmitting a resource record to a requesting computer. An authoritative domain name server receives a DNS query from a requesting computer at a name server. The authoritative domain name server looks up the resource record based on the DNS query, wherein the resource record is associated with an epochal time and a time to live. The authoritative domain name server transmits the resource record response based on the epochal time.

Abstract: A mechanism is provided to enhance the scalability of network caching capabilities. All network client applications running on a partition in a virtualized environment are configured to query information from a single virtual input/output server (VIOS) network caching daemon. Thus, the illustrative embodiments provide a 1:n model where a VIOS partition has a network caching daemon, and each of the n partitions uses the network caching daemon of the VIOS partition. The mechanism of the illustrative embodiments only requires the system administrator to control one copy of the local files on the VIOS server. The system administrator does not need to monitor all of these local files on each individual partition. The system administrator consolidates the entries used by the different individual partitions into one single file on the VIOS server side.