International Business Machines Corporation

Lenovo (singapore) Pte. Ltd.

Shi Xin Ruan

Gang Tang

Na Zhu

Ming Shuang Xian

Guo Xing He

Tamanna Zackaria Sait

Zhu Na

Yi Bin Wang

Qing Feng Zhang

Xian Dong Meng

Venkatesan Selvaraj

Hui Qing Shi

Zheng Dong Zhu

Chao Yu

Yun Feng Sun

Zi Lian Ji

Vaishali Pandya

Xiang Hui Dong

Lin Juan Xia

Malathi K Nagamangala

A method includes receiving, at a data link layer (layer 2) gateway device configured to connect the physical network to the SDN network, routing data to a computing device, the computing device selected to receive a packet transmitted from the physical network to the SDN network; receiving, from a source element in the physical network, an address request for a layer 2 address of a router element in the SDN network, the address request including a networking layer address of the router element; transmitting, to the source element in response to receiving the address request, a layer 2 address of the router element using the routing data; receiving, from the source element, a routing request to route a packet to a destination element in the SDN network using the layer 2 address; routing, using the routing data, the received packet to the computing device to route to the destination element.

Routing between software defined networks and physical networks

Methods, computer program products, and systems are presented. The method computer program products, and systems can include, for instance: collecting logging data generated by operation of a distributed computing system that is used by a plurality of tenants; storing the logging data as a plurality of files stored in a multi tier, shared volume storage system, with the storage of the logging data as a plurality of files including: dividing the plurality of files among and between a plurality of shared volume data structures, and organizing each shared volume data structure of the plurality of shared volume data structures according to a plurality of tiers; for each given file of the plurality of files; and mapping, by a domain agent and in a mapping table data structure, an association between the given file and the shared volume data structure in which the given file is stored.

Shared volume based centralized logging

Aspects of the present invention provide an approach for improving communications between a software-defined networking (SDN) controller and a hardware gateway in a SDN. In an embodiment, a SDN proxy gateway is installed. The SDN proxy gateway communicates with the SDN controller on behalf of the hardware gateway. To accomplish this, the SDN proxy gateway processes a communication sent from the SDN controller to the hardware gateway. This communication includes a request from a computing node to establish a network communication channel. The SDN proxy gateway translates these instructions (e.g., the logical network and endpoint information), which are in the native format of the SDN controller, into a standardized hardware gateway protocol. The translated information that the hardware gateway can use to establish the network connection is then pushed to the hardware gateway by the proxy gateway.

Software-defined networking proxy gateway

One embodiment discloses a method and apparatus for synchronizing IP information of virtual machines. The method includes: obtaining an IP relevant message of at least one virtual machine within a subnet, recording IP information and connection information of the at least one virtual machine based on the IP relevant message, and modifying connection information of a specific virtual machine in response to migration of the specific virtual machine. The apparatus corresponds to the method. With the method and apparatus above, IP information and connection information of respective virtual machines within the subnet are recorded regularly and routinely. Once a certain virtual machine is migrated, updating and modifying connection information of the migrated virtual machine is only needed, but without a need for resending a request to the Dynamic Host Configuration Protocol (DHCP) server. Thus, network disruptions caused by non-synchronization of IP information when the virtual machine is migrated are avoided.

Synchronizing IP information of virtual machines

Aspects provide optimized broadcast, unknown unicast, multicast packet (BUM) flooding. A flooding interface list is built for a network virtualization edge structure for an overlay network first virtual machine that includes one or more tunnel interfaces, one for each of a subset of the underlay network virtualization edge structures. In response to receiving a BUM packet from the first virtual machine at the first network virtualization edge structure, an overlay encapsulated packet is generated from the BUM packet and sent out to only those tunnel interfaces listed within the flooding interface list built for the virtual machine, thereby without sending to other network virtualization edge structures that do not have tunnel interfaces listed within the built flooding interface list.

Overlay network with optimized packet flooding

An apparatus for optimizing network traffic which includes a host computer having virtual machines (VMs); a monitoring module to collect network traffic data from the VMs; an analysis engine to receive the network traffic data from the monitoring module and to calculate metric values pertaining to the network traffic data; a pattern module to store network traffic patterns having metric values and to provide the network traffic patterns to the analysis engine, the analysis engine compares the calculated metric values to the network traffic pattern metric values and provides an output of a result of the compare of the calculated metric values to the network pattern metric values; and responsive to receipt of the output from the analysis engine, an optimization module processes the output and provides an optimization action to the VMs to improve the flow of the network traffic between the VMs.

Automatically optimizing network traffic

Apparatuses, methods, systems, and program products are disclosed for controller-based dynamic routing in a software defined network environment. A gateway module receives a routing protocol control packet at a virtual gateway of a software defined network ('SDN'). The SDN includes one or more virtual gateways that connect the SDN to one or more external networks. A routing control module forwards the received routing protocol control packet to a controller for the SDN. The SDN controller updates a routing information base for the SDN based on the received routing protocol control packet. An update module sends at least a portion of the routing information base to one or more external routers connected to the SDN.

Controller-based dynamic routing in a software defined network environment

Growing community of inventors

Wuxi, China

Shi Xin Ruan