Patent application number | Description | Published |
20110075664 | Private Allocated Networks Over Shared Communications Infrastructure - Methods and systems for implementing private allocated networks in a virtual infrastructure are presented. One method operation creates virtual switches in one or more hosts in the virtual infrastructure. Each port in the virtual switches is associated with a private allocated network (PAN) from a group of possible PANs. In one embodiment, one or more PANs share the same physical media for data transmission. The intranet traffic within each PAN is not visible to nodes that are not connected to the each PAN. In another operation, the method defines addressing mode tables for the intranet traffic within each PAN. The entries in the addressing mode tables define addressing functions for routing the intranet traffic between the virtual switches, and different types of addressing functions are supported by the virtual switches. | 03-31-2011 |
20130227558 | PROVISIONING OF DISTRIBUTED COMPUTING CLUSTERS - Embodiments perform automated provisioning of a cluster for a distributed computing platform. Target host computing devices are selected from a plurality of host computing devices based on configuration information, such as a desired cluster size, a data set, code for processing the data set and, optionally, a placement strategy. One or more virtual machines (VMs) are instantiated on each target host computing device. Each VM is configured to access a virtual disk that is preconfigured with code for executing functionality of the distributed computing platform and serves as a node of the cluster. The data set is stored in a distributed file system accessible by at least a subset of the VMs. The code for processing the data set is provided to at least a subset of the VMs, and execution of the code is initiated to obtain processing results. | 08-29-2013 |
20140112343 | Private Allocated Networks Over Shared Communications Infrastructure - Methods and systems for implementing private allocated networks in a virtual infrastructure are presented. One method operation creates virtual switches in one or more hosts in the virtual infrastructure. Each port in the virtual switches is associated with a private allocated network (PAN) from a group of possible PANs. In one embodiment, one or more PANs share the same physical media for data transmission. The intranet traffic within each PAN is not visible to nodes that are not connected to the each PAN. In another operation, the method defines addressing mode tables for the intranet traffic within each PAN. The entries in the addressing mode tables define addressing functions for routing the intranet traffic between the virtual switches, and different types of addressing functions are supported by the virtual switches. | 04-24-2014 |
20150256448 | METHOD AND SYSTEM FOR PATH DISCOVERY - Methods and systems for discovering a path of network traffic that travels from a source host to a destination host are disclosed. A method involves, at the source host, generating probe packets that have the same load balancing parameters as packets of an application that generates application packets for transmission from the source host to the destination host and a path discovery signature comprised of bits from at least one of the network layer header and the transport layer header. The method also involves transmitting the probe packets from the source host to the destination host. In some embodiments, the steps of the method are performed when program instructions contained in a computer-readable storage medium are executed by one or more processors. | 09-10-2015 |
20150281059 | HOST ARCHITECTURE FOR EFFICIENT CLOUD SERVICE ACCESS - A method for a host machine that hosts at least one tenant virtual machine (VM) of a particular tenant logical network that accesses service VMs of a particular service logical network. The method, prior to a packet being received at a PFE on the host, intercepts the packet that sent by the tenant VM to one of the service VMs based on a set of forwarding rules. The packet includes a source IP address and a source port number of the tenant VM. The method, prior to the packet leaving the PFE in the host, replaces the source IP address and source port number with a replacement IP address and port number pair from a set of replacement IP address and port number pairs allocated to the host for accessing service VMs. The method sends the modified packet to the PFE to forward the modified packet to the service VM. | 10-01-2015 |
20150281060 | PROCEDURES FOR EFFICIENT CLOUD SERVICE ACCESS IN A SYSTEM WITH MULTIPLE TENANT LOGICAL NETWORKS - A method of providing efficient access to cloud services in a network that includes a several tenant logical networks and a set of service logical networks. The method receives, from a particular tenant VM, a first packet that specifies a destination address associated with a service VM of a service logical network. The method, based on the destination address of the first packet, replaces the source network address and source port number of the first packet with one of a set of network address and port number pairs allocated for accessing service VMs. The method receives from the particular VM a second packet that specifies a destination address outside the tenant logical network but not associated with any service VM. The method, without modifying the source address and port number of the second packet, forwards the second packet to a network element outside the host for network NAT processing. | 10-01-2015 |
20150281171 | DISTRIBUTED NETWORK ADDRESS TRANSLATION FOR EFFICIENT CLOUD SERVICE ACCESS - A method for coordinating distributed network address translation (NAT) in a network within which several logical networks are implemented. The logical networks include several tenant logical networks and at least one service logical network that include service virtual machines (VMs) that are accessed by VMs of the tenant logical networks. The method defines a group of replacement IP address and port number pairs. Each pair is used to uniquely identify a VM across all tenant logical networks. The method sends to at least one host that is hosting a VM of a particular tenant logical network, a set of replacement IP address and port number pairs. Each replacement IP address and port number pair can be used by the host to replace a source IP address and a source port number in a packet that is destined from the particular VM to a VM of the particular service logical network. | 10-01-2015 |
20150381457 | MULTI-PATH NETWORK BANDWIDTH ESTIMATION - Some embodiments provide a method for measuring network characteristics (e.g., bandwidth estimation, path diversity, etc.) without requiring administrative access to intermediate network elements and independent from the specific network fabric. The method measures the bandwidth (e.g., available bandwidth, capacity, etc.) between a given pair of endpoints (e.g., a source forwarding element and a destination forwarding element at the edges of the network) by identifying the routing paths between the endpoints and calculating the bandwidth for each path in order to estimate the network bandwidth between the endpoints. | 12-31-2015 |
20150381459 | IDENTIFYING A NETWORK TOPOLOGY BETWEEN TWO ENDPOINTS - Some embodiments provide a method that identifies a network topology that is involved in routing of the network traffic between the endpoints in a pair of endpoints. The identified topology covers (1) all the routing paths (e.g., hardware and software-defined paths) between the endpoints and (2) all the forwarding elements (e.g., hardware and software-defined non-edge forwarding elements) along each path that forwards the network traffic (e.g., network packets). The method identifies, and groups together, the receiving interfaces as well as the forwarding interfaces of each forwarding element along different paths between the endpoints. By doing so, the method can identify a real link between a pair of forwarding elements when a set of forwarding interfaces of each one of the forwarding elements in the pair points to the other forwarding element. | 12-31-2015 |
20150381486 | PERIODICAL GENERATION OF NETWORK MEASUREMENT DATA - Some embodiments provide a method that generates different network measurements data (e.g., network topology, bandwidth estimation of different paths, etc.) for a pair of endpoints upon receiving a network administrative request (e.g., an application programming interface (API) request) or by other means (e.g., automatically and without intervention of a user). In some embodiments, the method is implemented by a network measurement agent operating on each endpoint and a centralized service component (e.g., web service layer) executing on a network manager machine (e.g., a controller) that responds to measurement requests. The network measurement agent probes the network periodically (i.e., in certain time intervals) or upon an API request that it receives through the network manager machine to gather the measurement data of a particular network topology between a pair of endpoints. | 12-31-2015 |