Abstract:
Node devices of a mesh communications network are interconnected by links. Forwarding tables are initially built following a link-state routing protocol. Each node device performs, upon detecting a link failure or a link recovery: determining, from a local forwarding table, one or more data paths impacted by the link failure or restored by the link recovery; and, transmitting toward one end-point of each determined data path at least one message representative of said link failure or said link recovery and including identifiers of said determined paths. Each end-point, when receiving said message(s) representative of said link failure or said link recovery, records an indication of whether each data path identified in the received message(s) can be activated or not. When the received message(s) is(are) representative of a link failure, each end-point performs: selecting an alternative data path for each data path identified in said received message(s); and transmitting, for each selected alternative data path, a path switch message toward the other end-point of said selected alternative data path, aiming at activating said alternative data path instead of the corresponding data path impacted by the link failure.
Abstract:
An example of high availability for FC or FCoE can include maintaining connection state information in a Fiber Channel over Ethernet (FCoE) Data Forwarder (FDF) or Fiber Channel Data Forwarder (FcDF). A failure of a first FCoE Forwarder (FCF) associated with the FDF can be detected. A second FCF can check a configuration file of the second FCF to see if the second FCF is responsible for the FDF. The second FCF can request the virtual domain ID, of the failed FCF, from a principal switch. The second FCF can be used as a service node for the FDF.
Abstract:
Example methods and apparatus to measure market statistics are disclosed. A disclosed example method includes retrieving a service penetration value from a managed data source, retrieving an Internet protocol (IP) address from a convenience data source, and identifying a household identification number associated with the retrieved IP address. The example method also includes retrieving household data associated with the household identification number, verifying a service provider name provided by the convenience data source, and adjusting a weight value of the retrieved household data when the service provider name provided by the convenience data source is different than a current service provider name. Additionally, the example method includes calculating service provider flow share based on the adjusted weight value and the service penetration value, and generating a report including the calculated service provider flow share.
Abstract:
An improved system and method for network switching that provides the ability to automatically and seamlessly migrate policies for network hosts under certain conditions to local or remote switch ports. The improved switch automatically migrates switch policies for virtual and physical hosts from a source port to a destination port when hosts have been physically moved or replaced. For elements that have failed, the improved switch also migrates host network policies for both physical hosts and virtual machines when the old host network policy will maintain serviceability of the element when applied to the new port.
Abstract:
A method and apparatus selectively resetting a control plane in a network element is described. One embodiment of the invention is a network element with a selective reset controller that can reset the control plane of the network element without interrupting the data traffic processing of the data plane of the network element.
Abstract:
Methods, systems, and computer program products for implementing automatic protection switching for media packets, such as ATM cells or IP packets that carry media content, in a device that includes an Ethernet switching fabric are disclosed. According to one method, first and second packet network interfaces of the device are configured to function as working and protection APS interfaces (400). At least one of a media processing resource and an Ethernet switch fabric of the device are configured to replicate egress media packets from the media processing resource to the working and protection APS interfaces (402). Egress media packets from the media processing resource are forwarded to the working and protection APS interfaces via the switch fabric (404). Ingress media packets received at the working APS interface are forwarded to the media processing resource via the Ethernet switch fabric (406). Media packets received at the protection APS interface are discarded.
Abstract:
An interconnection network has a first stage network and a second stage network and a collection of devices outside the network so that a first device is capable of sending data to a second device. The first stage network is connected to inputs of the second stage network. The first and second stage networks each have more outputs than inputs. The data is first sent from the first device to the first stage network and then from the first stage network to the second stage network. The data is sent to the second device from the second stage network. The number of inputs to a device w the collection of devices from the second stage network exceeds the number of outputs from device w into the first stage network. The device w with N p input ports is capable of simultaneously receiving data from N p devices in the collection of devices. The latency through the entire system may be a fixed constant.
Abstract:
This invention provides an apparatus and method to aggregate individual fibre channel data streams in their native to extend connectivity of fibre channel storage area networks across wide geographical distances over a high-speed data channel with forward error correction