Abstract: A network device includes one or more ports coupled to a network, and a time synchronization module. The time synchronization module processes (i) respective path information, and (ii) respective time synchronization information included in each of at least some of a plurality of time synchronization packets received from a master clock device over two or more different communication paths and via at least one of the one or more ports, wherein the respective path information indicates a respective communication path in the network via which the respective time synchronization packet was received. The time synchronization module determines a system time clock responsive to the processing of the path information and the time synchronization information included in the at least some of the plurality of time synchronization packets.

Abstract: A multi-stage switching system comprises a first stage including a plurality of groups of switching devices. Each group of switching devices includes more than one switching device, and each group of switching devices is associated with a corresponding single device identifier (ID). A second stage includes a plurality of switching devices. The switching devices of the first stage are coupled to the switching devices of the second stage via a plurality of uplinks. Switching devices of the first stage are configured to associate a target device ID and a target port ID to a data unit received via a front port of the switching system. The switching devices of the first stage and the switching devices of the second stage are configured to direct the data unit through the switching system using the target device ID and a target port ID.

Abstract: A device in a server having a processor and a storage. The device has a downstream communication unit configured to receive a data packet. The device also has a protocol blind network path indication unit configured to obtain an indicator corresponding to a predetermined path to a data communication unit in the network, by accessing the protocol blind correlation structure using a destination address of the data packet. The device, furthermore, has an upstream communication unit configured to transmit a network protocol blind packet including the data packet and the indicator corresponding to the predetermined data path to the data communication unit in the network. The device also includes a combiner configured to bind the indicator to the data packet received by the downstream communication unit.

Abstract: A method for forwarding FCoE packets in a network switching device includes receiving a first packet at the network switching device via an Ethernet link, determining, in the network switching device, an FC destination identifier included in the first packet, updating, in the network switching device, an Ethernet address based on the FC destination identifier, generating, in the network switching device, a first TRILL destination identifier based on the updated Ethernet address, and causing, in the network switching device, the first packet to be forwarded to a different device based on the first TRILL destination identifier.

Abstract: A method for processing packets, in a network device including at least one processing engine that i) is not configured to process destination information that conforms to a first protocol and ii) is configured to process destination information that conforms to a second protocol, includes receiving a packet at the network device, and determining, in the network device, first destination information included in the packet. The first destination information conforms to the first protocol. The method also includes generating, in the network device, second destination information conforming to a third protocol based on the first destination information. The method also includes generating, in the network device, third destination information conforming to the second protocol based on the second destination information. The method also includes processing the packet with the at least one processing engine included in the network device using the third destination information.

Abstract: Devices, systems, methods, and other embodiments associated with cascaded memory tables for searching are described. In one embodiment, an integrated chip is implemented with two or more address tables. The two or more address tables are implemented with separate memory tables to store addresses. The two or more address tables are comprised of a first address table and a second address table. Connection lines connect the first address table and the second address table to create a cascaded address table. Search logic initiates a search of the first address table for an address. If the address is not found, the search logic initiates a search of the second address table through the connection lines.

Abstract: Aspects of the disclosure provide a network device. The network device includes a first port coupled to a first device to communicate with the first device, and a clock wander compensation module. The first port recovers a first clock based on first signals received from the first device. The clock wander compensation module includes a global counter configured to count system clock cycles based on a system clock of the network device, and a first port counter configured to count first clock cycles based on the recovered first clock. Further, the first port transmits a first pause frame to the first device based on the global counter and the first port counter.

Abstract: Devices, systems, methods, and other embodiments associated with cascaded memory tables for searching are described. In one embodiment, an integrated chip is implemented with two or more address tables. The two or more address tables are implemented with separate memory tables to store addresses. The two or more address tables are comprised of a first address table and a second address table. Connection lines connect the first address table and the second address table to create a cascaded address table. Search logic initiates a search of the first address table for an address. If the address is not found, the search logic initiates a search of the second address table through the connection lines.

Abstract: The present disclosure provides methods and apparatus for monitoring performance of a Maintenance Entity (ME) in a computer network. In one embodiment, a method of monitoring performance of an ME includes receiving a control frame via the ME. The method further includes using a hardware performance monitor to provide to a programmable processor a metric indicative of a performance parameter associated with the ME based at least in part on information in the control frame. The method further includes using the programmable processor to determine the performance parameter associated with the ME based at least in part on the metric provided using the hardware performance monitor.

Abstract: Techniques to avoid polarization in a communication network include a network switch or device having a first interface to receive a data unit or packet, and a second interface via which the packet is transmitted from the network device. The network device includes a hash value generator configured to generate, using a depolarizer, a depolarized key from an initial key (where the initial key is based on contents of the packet and the depolarizer is unique to the network device), and to generate a hash value based on the depolarized key and the packet by using a hash function that is common to all network devices in the network. The hash value may be optionally modified to load balance egress traffic of the network device. The network device selects an egress link or port, such as by determining an index into an egress table based on the (modified) hash value.

Abstract: Techniques to load balance traffic in a communication network include a network switch or device having an interface to receive a data unit or packet. The network device includes a hash value generator configured to generate a symmetric key from an initial key that is based on the packet, and configured to generate a hash value based on the symmetric key and the packet. The hash value may be optionally modified to load balance egress traffic of the network device. The network device selects an egress link or port, such as by determining an index into an egress table based on the (modified) hash value. The techniques described herein allow packets or data units of a particular flow to travel in both directions along a same path through the communication network.

Abstract: Techniques to load balance traffic in a network device or switch include a network device or switch having a first interface to receive a data unit or packet, a second interface to transmit the packet, and a mapper to map between virtual ports and physical ports. The network device includes hash value generator configured to generate a hash value based on information included in the packet and based on at least one virtual port. The hash value may be optionally modified to load balance egress traffic of the network device. The network device selects a particular virtual port for egress of the packet, such as by determining an index into an egress table based on the (modified) hash value. The packet is transmitted from the network device using a physical port mapped to the particular virtual port.

Abstract: Packets are received from a network, and for each received packet, it is determined whether the packet belongs to one of a plurality of previously identified flows using a plurality of existing flow rules. For each received packet determined to belong to one of the previously identified flows, a flow identifier is assigned to the packet to indicate the previously identified flow to which the packet belongs and the packet or a packet descriptor corresponding to the packet is directed to a next location in a packet forwarding pipeline. Additionally, for each received packet determined not to belong to one of the previously identified flows, it is determined whether the packet belongs to a currently unknown flow.

Abstract: An apparatus for forwarding packets includes a packet processing pipeline having a processing unit that processes packets compliant with a recognized communication protocol. A first port coupled to the packet processing pipeline is configured to receive a packet that does not comply with the recognized communication protocol and has a header that conforms to a second communication protocol. A data extraction unit extracts first destination information from the header of the packet and, based on the first destination information, generates second destination information that conforms to the recognized communication protocol. The processing unit determines, based on the second destination information, an egress interface to which the packet is to be forwarded.

Abstract: Devices, systems, methods, and other embodiments associated with cascaded memory tables for searching are described. In one embodiment, an integrated chip is implemented with two or more address tables. The two or more address tables are implemented with separate memory tables to store addresses. The two or more address tables are comprised of a first address table and a second address table. Connection lines connect the first address table and the second address table to create a cascaded address table. Search logic initiates a search of the first address table for an address. If the address is not found, the search logic initiates a search of the second address table through the connection lines.

Abstract: An agent selected from: (a) a pathogenic self-antigen associated with a T-cell-mediated specific autoimmune disease of an organ; (b) a peptide which sequence is comprised within the sequence of (a); (c) a peptide obtained by modification of (b), by replacement of one or more amino acid residues by different amino acid residues, said modified peptide still being capable of recognizing the T-cell receptor recognized by the parent peptide but with less affinity; (d) a nucleotide sequence encoding (a), (b), or (c); and (e) T cells activated by a pathogenic self-antigen of (a), a peptide of (b), or a modified peptide of (c), can be used for treatment of a non-autoimmune disease, disorder or injury in said organ. For example, uveitogenic antigens or peptides thereof can be used for treatment of a non-autoimmune disease, disorder or injury in the eye.