| CISCO TECHNOLOGY,INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20100315946 | Failure protection for access ring topology - In one embodiment, a method includes configuring a first node, located at an edge of a core network and connected to an access ring, with a maintenance end point for a virtual local area network on a port connecting the first node to the access ring. The first node operates in an active mode for the virtual local area network and is in communication with a second node located at the edge of the core network and connected to the access ring. The method further includes receiving and processing at a processor at the first node, continuity check messages from access nodes on the access ring, synchronizing the first node with the second node, and communicating from the first node to the second node to initiate switching of the second node from a backup mode to the active mode for the virtual local area network upon identification of a failure. | 12-16-2010 |
| 20100061246 | TRANSIT PREVENTION IN HUB-AND-SPOKE TOPOLOGIES USING LINK STATE PROTOCOLS - In one embodiment, a method and apparatus of controlling transmission of data packets in a communications network includes designating all networking devices in a portion of the communications network as either hubs or spokes, communicating a link-state advertisement to each connected hub and spoke in the portion of the communications network, computing a shortest path tree at all the hubs and the spokes based on the link-state advertisement, the computing including truncating the shortest path tree at the hubs only for links leading from the spoke to the hub, creating a routing table at each of the hub and the spoke based on the truncated shortest path tree, and transmitting the data packets in the communications network based on the link-state advertisement. The shortest path tree includes all data transmission routes in the tree except links leading from a spoke to a hub. | 03-11-2010 |
