Fast reroute of redundant multicast streams

    公开(公告)号:US09806895B1

    公开(公告)日:2017-10-31

    申请号:US14675303

    申请日:2015-03-31

    Abstract: A system and method for selecting packets to be forwarded from redundant multicast streams. A primary multicast stream and a secondary multicast stream are received, wherein the primary multicast stream and the secondary multicast stream are redundant multicast streams received over disjoint multicast forwarding paths. A hardware-based analyzer in a forwarding plane of the network device is applied to detect when a quality of one of the primary multicast stream or the secondary multicast stream has fallen below a threshold. In response to detecting that a quality of one of the primary multicast stream or the secondary multicast stream has fallen below a threshold, selecting, via a thread executing in a forwarding component of the network device, a different one of the primary multicast stream or the secondary multicast stream having a quality that meets the threshold, wherein selecting includes dynamically rewriting next hop operations associated with the selected stream. Packets received on the selected one of the primary multicast stream or the secondary multicast stream are forwarded and packets of the multicast stream received on the other one of the primary multicast stream or the secondary multicast stream for which the quality has fallen below the threshold are discarded.

    CONTROLLED SPATIAL REUSE IN A WLAN
    26.
    发明申请

    公开(公告)号:US20170311166A1

    公开(公告)日:2017-10-26

    申请号:US15498358

    申请日:2017-04-26

    Applicant: Apple Inc.

    Abstract: An interface circuit in an electronic device may receive, from an access point associated with the electronic device, a frame with management information that enables the electronic device to use a spatial-reuse technique, where the electronic device, through the spatial-reuse technique, adjusts a transmit power and a channel-availability sensing threshold. Moreover, the management information may specify parameters for the spatial-reuse technique. Then, the electronic device may transmit, using the spatial-reuse technique, one or more frames to the access point based on the parameters. Furthermore, the electronic device may transmit, to the access point, feedback information that indicates communication performance during the communication between the electronic device and the access point. For example, the feedback information may include a retry rate and, more generally, communication-performance information. This feedback information may be used by the access point to modify the parameters.

    BIT INDEX EXPLICIT REPLICATION (BIER) FORWARDING FOR NETWORK DEVICE COMPONENTS

    公开(公告)号:US20170302566A1

    公开(公告)日:2017-10-19

    申请号:US15641804

    申请日:2017-07-05

    CPC classification number: H04L45/16 H04L49/201 H04L49/30 H04L49/3009

    Abstract: A network device receives multicast packets that include information identifying destinations in the network, identifies next hops associated with the destinations, and populates a cache with the destinations and addresses of the identified next hops. The network device receives a particular multicast packet that includes information identifying particular destinations included in the cache, identifies one or more next hops for the particular destinations from the cache, and forwards the particular multicast packet to the identified one or more next hops to permit the identified one or more next hops to forward the multicast packet toward the particular destinations.

    Method of operating a network according to MMRP standard

    公开(公告)号:US09774545B2

    公开(公告)日:2017-09-26

    申请号:US14598354

    申请日:2015-01-16

    Inventor: Christoph Wrobel

    CPC classification number: H04L49/201 H04L45/74

    Abstract: A method for operating a network having a plurality of terminals and a plurality of switches connected to one another via data lines has the first step of transmitting a multicast MMRP data packet from a data source via at least one of the switches and one of the data lines to a predetermined terminal intended to receive the multicast data packet. Then one port of a switch to which is connected another terminal that is not MMRP-capable is fed the multicast address as a static entry of the terminal connected to the one port. The multicast address is then transmitted to the at least one switch connected thereto.

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