Abstract: The disclosed embodiments relate to a system that initializes communications across a communication link. During operation, the system uses a three-way handshake protocol to communicate a request containing target first-side link parameters from a first side of the communication link to a second side of the communication link. The system also uses the three-way handshake protocol to communicate a request containing target second-side link parameters from the second side of the communication link to the first side of the communication link. Next, the system determines actual link parameters based on the target first-side link parameters and the target second-side link parameters, and configures the communication link based on the actual link parameters.

Abstract: A joint assembly includes a first member having splines formed therein. A second member includes splines formed thereon and is coupled to the first member. The splines of the first member engage the splines of the second member. An access window is formed on the first member. A ring retains the first member to the second member. A portion of the ring is accessible through the access window, where the ring can be manipulated to release the first member from the second member.

Abstract: Upon detecting a failure of a switch link in a set of multiple redundant switch links that directly connect two nodes in the switch fabric network, the system performs a failover operation that remaps network traffic associated with the failed switch link to an alternative switch link in the set of multiple redundant switch links. Each node in the switch fabric network maintains a mapping table that translates from logical ports and associated logical virtual lanes to physical ports and associated virtual lanes. The system also provisions switch links with private virtual lanes comprising resources to facilitate failover operations. While remapping the network traffic, the system changes the mapping table so that network traffic, which is presently directed to a physical port and associated virtual lane for the failed switch link, is remapped to an alternative physical port and an associated private virtual lane, for the alternative switch link.

Abstract: Implementations of the present disclosure involve an apparatus and/or method for an efficient packet queue depth sorting scheme for a ‘longest queue first’ based switch fabric device. In general, the sorting scheme compares a data queue length on an incoming port to a sorted queue of available ports based on longest queue. Based at least on the results of the comparison of the data queue length on the input port, a port designator is inserted into a re-sorted longest queue available port list in the proper position based on the incoming or outgoing port data length. The remaining entries are then sorted around the inserted port designator. Because the comparison and insertion of the port designator can occur in one clock cycle of the switch fabric device, efficiency of the switch is improved.

Abstract: The disclosed system handles a switch link failure in a switch fabric network. When a node in the switch fabric network detects a failure of a switch link coupled to the node, the system remaps traffic that is directed to a logical port number, which is currently mapped to a primary physical port number associated with the failed switch link, to a secondary physical port number associated with the alternative switch link. This remapping involves performing a lookup in a local mapping table at the node, wherein the local mapping table stores associations between logical port numbers and physical port numbers, wherein for each logical port number, the mapping table includes a primary physical port number and one or more secondary physical port numbers, which are associated with alternative switch links. The system notifies a subnet manager for the switch fabric network about the link failure and the remapping.

Abstract: In accordance with an embodiment, described herein is a system and method for providing a programmable packet classification framework for use in a network device in a high performance network. The packet classification framework can comprise a plurality of hardware-based programmable classification primitives, including a key composition primitive, a key composition rule primitive, a match action logical structure, and a next action primitive. The classification primitives can be logically strung together, with the results from one classification primitive fed into the next one until the processing of a data packet is completed. The classification framework can use a state machine to track states of the data packet processing, and dynamically adjust behaviors of the classification primitives based on the processing states of a data packet.

Abstract: In accordance with an embodiment, described herein is a system and method for partitioning classification resources in a network device in a high performance network. Classification resources can be configured into a plurality of levels of partitions, with one or more hardware-based partitions configured to store flow entries associated with frequently-used or performance-sensitive flows, and a firmware-based partition to access large lookup tables stored in one or more additional memories for classification resource scalability. A lookup key can be used for search for a flow entry match in the hardware-based partitions first. If there is a miss, the lookup key can be presented to the firmware-based partition for further search. Results from the firmware-based level can be dispatched back to a hardware-based parser for further processing. Flow entries can be moved between lookup tables by a partition management block based on utilization of the flow entries.

Abstract: Upon detecting a failure of a switch link in a set of multiple redundant switch links that directly connect two nodes in the switch fabric network, the system performs a failover operation that remaps network traffic associated with the failed switch link to an alternative switch link in the set of multiple redundant switch links. Each node in the switch fabric network maintains a mapping table that translates from logical ports and associated logical virtual lanes to physical ports and associated virtual lanes. The system also provisions switch links with private virtual lanes comprising resources to facilitate failover operations. While remapping the network traffic, the system changes the mapping table so that network traffic, which is presently directed to a physical port and associated virtual lane for the failed switch link, is remapped to an alternative physical port and an associated private virtual lane, for the alternative switch link.

Abstract: The disclosed system handles a switch link failure in a switch fabric network. When a node in the switch fabric network detects a failure of a switch link coupled to the node, the system remaps traffic that is directed to a logical port number, which is currently mapped to a primary physical port number associated with the failed switch link, to a secondary physical port number associated with the alternative switch link. This remapping involves performing a lookup in a local mapping table at the node, wherein the local mapping table stores associations between logical port numbers and physical port numbers, wherein for each logical port number, the mapping table includes a primary physical port number and one or more secondary physical port numbers, which are associated with alternative switch links. The system notifies a subnet manager for the switch fabric network about the link failure and the remapping.

Abstract: A processing device of a media server selects a media item to be provided to users via a satellite broadcast system, encrypts the media item using an encryption key to generate an encrypted media item, and transmits the encrypted media item to the satellite broadcast system via a first communication protocol. The processing device receives a request from a user device for authorization to decrypt the encrypted media item obtained by the user device via a direct connection with the satellite broadcast system. The request is received by the media server via a second communication protocol that is different from the first communication protocol. The processing device determines whether the user device is authorized to decrypt the encrypted media item, and transmits a key for decrypting the encrypted media item in response to the user device being authorized to decrypt the encrypted media item.

Abstract: A system and method can support efficient packet processing in a network environment. The system can comprise a direct memory access (DMA) resources pool that comprises one or more of DMA resources. Furthermore, the system can use a plurality of packet buffers in a memory, wherein each said DMA resource can point to a chain of packet buffers in the memory. Here, the chain of packet buffers can be implemented based on either a linked list data structure and/or a linear array data structure. Additionally, each said DMA resource allows a packet processing thread to access the chain of packet buffers using a pre-assigned thread key.

Abstract: Implementations disclose an access control mechanism for peer-to-peer sharing technology. A method includes receiving, by a processing device of a first user device, an encrypted media item and a wrapped encryption key from a second user device via a peer-to-peer connection; transmitting, by the first user device, the wrapped encryption key and a request to a media server to determine whether the first user device is authorized to play the encrypted media item; receiving, from the media server, a response indicating the first user device is authorized to play the encrypted media item, the response comprising an encryption key derived from the wrapped encryption key; and decrypting the encrypted media item using the encryption key to play the media item.

Abstract: A system and method can support packet switching in a network environment. A networking device, such as a network switch, which includes a crossbar fabric, can be associated with a plurality of input ports and a plurality of output ports. Furthermore, the networking device can detect a link state change at an output port that is associated with the networking device. Then, the networking device can notify one or more input ports, via the output port, of the link state change at the output port.

Abstract: A system and method can support efficient packet switching in a network environment. A networking device, such as a network switch, which includes a crossbar fabric, can be associated with a plurality of input ports and a plurality of output ports. Furthermore, the networking device operates to detect a link state change at an output port on the networking device. The output port can provide one or more credits to an output scheduler, and the output scheduler allows one or more packets targeting the output port to be dequeued from one or more virtual output queues, based on the one or more credits.

Abstract: A system and method can support packet switching in a network environment. The system can include an ingress buffer on a networking device, wherein the ingress buffer, which includes one or more virtual output queues, operate to store one or more incoming packets that are received at an input port on the networking device. Furthermore, the system can include a packet flush engine, which is associated with the ingress buffer, wherein said packet flush engine operates to flush a packet that is stored in a said virtual output queue in the ingress buffer, and notify one or more output schedulers that the packet is flushed, wherein each output scheduler is associated with an output port.

Abstract: System and method for supporting proxy based multicast forwarding in a high performance computing environment. In accordance with an embodiment, a proxy based multicast forwarding system and method can be utilized. A proxy, either software, firmware, or hardware based, can be initialized and run within a local subnet domain, wherein the proxy is a member of at least one multicast group (MCG). The proxy can be configured to forward packets to other subnet domains in several different methods.

Abstract: System and method for supporting a partitioned switch forwarding table in a high performance computing environment. Described methods and systems can support partitioned switch forwarding tables (e.g., partitioned LFTs) by setting up hardware registers that divide the LFT into at least two partitions, a first partition that supports legacy forwarding (e.g., standard LID based forwarding without the need to use portions of the GRH), and a second partition to support the GRH based forwarding that is described above. In such a manner, switches and other hardware within a core fabric can behave as legacy nodes/switches having standard LFTs, while also being able to support the extended addressing supplied through the use of portions of the GRH.

Abstract: System and method for supporting virtual machine migration in a high performance computing environment. In accordance with an embodiment, when a virtual machine migrates from a first subnet to a second subnet, a gateway port at the first subnet can, upon receiving packets addressed to the migrated virtual machine, consult a memory lookup table to discover the virtual machine's new addresses. The gateway port can update the packet accordingly. The memory lookup table can be addressed based on a GUID of the virtual machine.

Abstract: System and method for supporting flexible forwarding domain boundaries in a high performance computing environment. In accordance with an embodiment, flexible forwarding domain boundaries can be supported by dividing/partitioning a physical switch into two or more logical switches, where each switch is logically in a different domain, and allowing a fabric to be decomposed into independent subnets with one two or more physical end ports at the physical switch. By doing so, the same hierarchical forwarding structure and management structure between subnets can be provided as when complete physical switches are used as building blocks.

Abstract: System and method for aggressive credit waiting in a high performance computing environment. In accordance with an embodiment, systems and methods can provide for an indexed matrix of credit wait policies between ports within a single switch. In addition, systems and methods can provide for an array of credit wait polices at an egress port from a switch, the array being indexed by virtual lane.