Abstract:
Methods and apparatus for providing tandem connection monitoring and performance monitoring capabilities in Ethernet and converged data link protocols are disclosed. According to one aspect of the present invention, a method for processing a packet which includes a preamble arrangement having at least one associated frame involves receiving a packet from a first network element included in a network path at a second network element included in the network path, and determining whether at least one error has arisen between a source of the network path and the second network element. When it is determined that an error has arisen between the source of the network path and the second network element, a first error count indication is inserted in the preamble arrangement to substantially account for the error.
Abstract:
Methods and apparatus for increasing the operational distance of multimode fibers are disclosed. According to one aspect of the present invention, an optical transmitter includes a framer that frames data and a scrambler that scrambles the data after the data is framed. The optical transmitter also includes an encoder that applies a forward error correction algorithm to encode the data after the data is scrambled, as well as a source that transmits the data across the multimode fiber after the data is encoded.
Abstract:
Synchronization techniques for multiple clock domains from two or more clients or common pluggable interfaces connected to multiple interfaces on one or more ingress line cards to multiple interfaces on one or more egress line cards are provided. The plurality of clock domain information from the clients that are connected on the ingress side is transmitted to the egress line cards. Two or more egress interfaces generate different clocks that are synchronized to the multiple clock domains.
Abstract:
A method and system for encapsulating a frame for transport over an optical transport network are disclosed. A method includes receiving a packet at a network device and encapsulating the packet. The packet is received from a network having a line frequency different than a payload frequency of the optical transport network and the encapsulated packet is configured for transport directly over the optical transport network without modification to compensate for the different frequencies.
Abstract:
According to another general aspect, an apparatus (100) may include a receiver (104), a decoding engine (106), an envelope generator (108), an error code generator (116), and a transmitter (118). In one embodiment, the receiver (104) may be configured to receive (502) an Ethernet packet (200) that includes a payload portion. In various embodiments, the decoding engine (106) may be configured to decode at least the payload portion of the Ethernet packet such that the size of the payload portion is reduced. In some embodiments, the envelope generator (108) may be configured to encapsulate (506) the payload portion such that packet boundaries may be identified. In various embodiments, the error code generator (116) may be configured to associate an error correction code with the encapsulated payload portion. In another embodiment, the transmitter (118) may be configured to transmit (510) the encapsulated payload and error correction code.
Abstract:
Methods and apparatus for providing tandem connection monitoring and performance monitoring capabilities in Ethernet and converged data link protocols are disclosed. According to one aspect of the present invention, a method for processing a packet which includes a preamble arrangement having at least one associated frame involves receiving a packet from a first network element included in a network path at a second network element included in the network path, and determining whether at least one error has arisen between a source of the network path and the second network element. When it is determined that an error has arisen between the source of the network path and the second network element, a first error count indication is inserted in the preamble arrangement to substantially account for the error.
Abstract:
Methods and apparatus for increasing the operational distance of multimode fibers are disclosed. According to one aspect of the present invention, an optical transmitter includes a framer that frames data and a scrambler that scrambles the data after the data is framed. The optical transmitter also includes an encoder that applies a forward error correction algorithm to encode the data after the data is scrambled, as well as a source that transmits the data across the multimode fiber after the data is encoded.
Abstract:
A method and system for encapsulating a frame for transport over an optical transport network are disclosed. A method includes receiving a packet at a network device and encapsulating the packet. The packet is received from a network having a line frequency different than a payload frequency of the optical transport network and the encapsulated packet is configured for transport directly over the optical transport network without modification to compensate for the different frequencies.