Abstract: An example method for path optimization in distributed service chains in a network environment is provided and includes receiving information about inter-node latency of a distributed service chain in a network environment comprising a distributed virtual switch (DVS), where the inter-node latency is derived at least from packet headers of respective packets traversing a plurality of service nodes comprising the distributed service chain, and modifying locations of the service nodes in the DVS to reduce the inter-node latency. In specific embodiments, the method further includes storing and time-stamping a path history of each packet in a network service header portion of the respective packet header. A virtual Ethernet Module (VEM) of the DVS stores and time-stamps the path history and a last VEM in the distributed service chain calculates runtime traffic latencies from the path history and sends the calculated runtime traffic latencies to a virtual supervisor module.
Abstract: Described herein are systems and methods for multiplexing and transmitting video data. The systems and methods use excess bandwidth in a channel available after meeting minimum transmission requirements for all bitstreams. A network device of the invention flexibly allocates this available bandwidth to minimize further rate reduction. More specifically, the network device periodically determines the available bandwidth, and divides the available bandwidth among multiple incoming bitstreams being multiplexed in order to increase downstream decoder buffer levels. By maintaining increased decoder buffer levels, future rate reduction of the video data may be avoided or applied to a lesser degree. Minimizing rate reduction in this manner improves bandwidth usage efficiency, and thus improves video data transmission and end-user output video quality.
Abstract: A motherboard assembly includes a motherboard, a circuit board, and an ejector assembly. The motherboard has a motherboard connector extending from a planar surface of the motherboard. The circuit board has a circuit board connector extending from a planar surface of the circuit board and coupled to the motherboard connector of the motherboard such that the planar surface of the circuit board orients substantially parallel to the planar surface of the motherboard. The ejector assembly orients between the motherboard and the circuit board. During an ejection procedure, the ejector assembly separates the motherboard connector and the circuit board connector while minimizing bending of either the circuit board or the motherboard. By limiting bending of either the circuit board or the motherboard, the ejector assembly minimizes damage to electrical traces or components carried by either the circuit board or the motherboard during the separation process.
Type:
Grant
Filed:
January 12, 2004
Date of Patent:
February 8, 2005
Assignee:
Cisco Techonology, Inc.
Inventors:
Gary Lynn Myers, Jack Brown Rector, III, Michael Chern
Abstract: A layer two forwarding protocol (L2F) provides virtual direct dial-up service into private networks through public internet service providers. An authorized remote client appears as a direct dial-up client to the home gateway, even through the client is accessing the home gateway remotely through the ISP. The new forwarding protocol allows the remote client to conduct point-to-point link protocols, such as point-to-point protocol (PPP) and serial line interface protocol (SLIP) directly with the local network home gateway. The network access server changes from a routing mode where a communication protocol is conducted with the client to a switching mode where the POP simply sends data from one port to a tunnel. The tunnel then transmits the data to another port, regardless of the header information on transmitted data packets. The remote client can then be managed through databases controlled by the local network and gain access to resources not typically accessible through the internet.