METHODS AND APPARATUS FOR CONFIGURING A VIRTUAL NETWORK SWITCH
Granted: November 28, 2013
Application Number:
20130315060
In one embodiment, a method includes sending a configuration signal to a virtual network switch module within a control plane of a communications network. The configuration signal is configured to define a first network rule at the virtual network switch module. The method also includes configuring a packet forwarding module such that the packet forwarding module implements a second network rule, and receiving status information from the virtual network switch module and status…
METHOD AND APPARATUS FOR FAST REROUTE IN A CONNECTION-ORIENTED NETWORK
Granted: November 28, 2013
Application Number:
20130315056
A method and an apparatus for rapidly resuming, at times of failures, network traffic in a connection-oriented network by using an alternative route pre-computed and stored locally in nodes along an initial route without requiring signaling of upstream nodes or a master server.
FILTERING AND ROUTE LOOKUP IN A SWITCHING DEVICE
Granted: November 21, 2013
Application Number:
20130308644
Methods and devices for processing packets are provided. The processing device may Include an input interface for receiving data units containing header information of respective packets; a first module configurable to perform packet filtering based on the received data units; a second module configurable to perform traffic analysis based on the received data units; a third module configurable to perform load balancing based on the received data units; and a fourth module configurable to…
METHODS AND APPARATUS FOR VIRTUAL SOFT HANDOFF
Granted: November 21, 2013
Application Number:
20130308597
In some embodiments, a non-transitory processor-readable medium includes code to cause a processor to receive at a tunnel server, a data unit addressed to a communication device, and define, a first instance of the data unit and a second instance of the data unit. The first instance of the data unit is sent to the communication device via a first tunnel defined between at least the tunnel server and a first base station associated with a first network. The second instance of the data…
Apparatus and Method of Compensating for Clock Frequency and Phase Variations by Processing Packet Delay Values
Granted: November 14, 2013
Application Number:
20130301660
An apparatus and method are described for compensating for frequency and phase variations of electronic components by processing packet delay values. In one embodiment, a packet delay determination module determines packet delay values based on time values associated with a first and a second electronic component. A packet delay selection module selects a subset of the packet delay values based on the maximum frequency drift of the first electronic component. A statistical parameter…
INLINE NETWORK ADDRESS TRANSLATION WITHIN A MOBILE GATEWAY ROUTER
Granted: November 14, 2013
Application Number:
20130301522
Techniques are described for performing inline NAT functions in a forwarding element of a mobile gateway router or other device in which subscriber sessions of a mobile access network are distributed across a plurality of session management cards. The session management cards pre-allocate a public network address and port range for subscribers at the time a network connection is established in response to connection request prior to receiving any data traffic associated with the…
FAST REROUTE USING LOOP FREE ALTERNATE NEXT HOPS FOR MULTIPOINT LABEL SWITCHED PATHS
Granted: November 14, 2013
Application Number:
20130301403
The techniques of this disclosure provide local protection for network traffic in multipoint label switched paths (LSPs) due to link or node failure using loop-free alternate (LFA) next hops. The techniques include establishing a vanilla or point-to-point (P2P) LSP with LFA next hops between routers of a multipoint LSP for use in the event of link or node failure in the multipoint LSP. Upon a failure, the multicast traffic is tunneled between the routers using the P2P LSP with LFA to an…
OPTICAL COMMUNICATION LINK EMPLOYING COHERENT DETECTION AND OUT OF BAND CHANNEL IDENTIFICATION
Granted: October 31, 2013
Application Number:
20130286847
An optical system may include: a demultiplexer to receive an optical signal and to demultiplex the optical signal into a plurality of optical channels; a detector circuit to: receive the plurality of optical channels, and identify a predetermined channel identification trace tone frequency for an optical channel of the plurality of optical channels; and a receiver to: receive the optical channel with the identified predetermined channel identification trace tone frequency from the…
ROUTING PROXY FOR RESOURCE REQUESTS AND RESOURCES
Granted: October 31, 2013
Application Number:
20130290544
A device receives, from a client device, a request for a resource, where the request provides an identifier of the client device. The device selects a target device for the resource, connects with the selected target device, and provides a proxy of the request to the selected target device, where the proxy of the request hides the identifier of the client device. The device receives the resource from the selected target device, where the resource provides an identifier of the target…
NON-MOBILE AUTHENTICATION FOR MOBILE NETWORK GATEWAY CONNECTIVITY
Granted: October 31, 2013
Application Number:
20130288644
In general, techniques are described for emulating mobile authentication methods to establish authenticated connectivity between a mobile service provider gateway and a wireless device attached to an alternate access network. For example, a system operating according to the described techniques includes a mobile service provider network, an alternate access network having an access gateway, and an authentication server of the mobile service provider network that receives a network access…
PATH WEIGHTED EQUAL-COST MULTIPATH
Granted: October 31, 2013
Application Number:
20130286846
Routers balance network traffic among multiple paths through a network according to an amount of bandwidth that can be sent on an outgoing interface computed for each of the paths. For example, a router receives a link bandwidth for network links that are positioned between the first router and a second router of the network, and selects a plurality of forwarding paths from the first router to the second router. Upon determining that one of the network links is shared by multiple of the…
METHODS AND APPARATUS FOR IMPROVING COMPATIBILITY BETWEEN NETWORK DEVICES
Granted: October 3, 2013
Application Number:
20130262651
In some embodiments, an apparatus includes a network device configured to receive an anomaly database of a first image that stores a set of differences between the first image and a base image. The network device is configured to compare the anomaly database of the first image with an anomaly database of a second image storing a set of differences between the second image and the base image to determine if the first and second images include at least one incompatible critical feature or…
PROCESSING DATA IN A COHERENT OPTICAL COMMUNICATION SYSTEM
Granted: October 3, 2013
Application Number:
20130259490
This disclosure describes techniques to sample electrical data streams in coherent receivers. For instance, an analog-to-digital converter (ADC) samples the received electrical data stream at a sampling rate that is nominally twice or greater than twice the symbol rate of the electrical data stream that the ADC receives. A digital filter receives the digital data stream from the ADC, and digitally filters the digital data streams to output a filtered digital electrical data stream at an…
REDUCED TRAFFIC LOSS FOR BORDER GATEWAY PROTOCOL SESSIONS IN MULTI-HOMED NETWORK CONNECTIONS
Granted: October 3, 2013
Application Number:
20130259058
This disclosure describes techniques to reduce traffic loss for a Border Gateway Protocol (BGP) session by delaying re-advertisement of routes received from a newly re-established multi-homed router by a primary router until all the routes are installed in a forwarding plane of the primary router. The techniques of this disclosure make use of a BGP marker received from the multi-homed router that indicates the end of a route download for an address family. Upon receiving the BGP marker,…
OAM LABEL SWITCHED PATH FOR FAST REROUTE OF PROTECTED LABEL SWITCHED PATHS
Granted: October 3, 2013
Application Number:
20130259056
In response to receiving a reply message for reserving bandwidth along a primary path for a first label switched path (LSP) for carrying data traffic from an ingress network device to an egress network device, a point of local repair (PLR) network device establishes a second LSP from the PLR to a merge point (MP) network device along a subset of the primary path. The second LSP is dedicated to carrying operations, administration and management (OAM) messages to verify connectivity of the…
METHODS AND APPARATUS FOR SPECTRAL SCANNING WITHIN A NETWORK
Granted: October 3, 2013
Application Number:
20130258859
In some embodiments, an apparatus includes a spectral scanning controller configured to interrupt service at a wireless access point (WAP) such that the WAP performs spectral scanning during service interruption. The spectral scanning controller is configured to interrupt service at the WAP at a first scanning frequency when the spectral scanning controller is in a first configuration. The spectral scanning controller is configured to interrupt service at the WAP at a second scanning…
SYSTEMS AND METHODS FOR SELECTIVELY PERFORMING EXPLICIT CONGESTION NOTIFICATION
Granted: October 3, 2013
Application Number:
20130258853
A system provides congestion control and includes multiple queues that temporarily store data and a drop engine. The system associates a value with each of the queues, where each of the values relates to an amount of memory associated with the queue. The drop engine compares the value associated with a particular one of the queues to one or more programmable thresholds and selectively performs explicit congestion notification or packet dropping on data in the particular queue based on a…
METHODS AND APPARATUS FOR CHANNEL SELECTION WITHIN A WIRELESS NETWORK
Granted: September 26, 2013
Application Number:
20130252653
In some embodiments, a method includes calculating, at a wireless access point (WAP) from a set of WAPs within a network, an interference value for each channel from a set of channels of the WAP. The method includes calculating, based on the interference value for each channel, a total move weight of the WAP. The method includes receiving, at the WAP, a total move weight from each remaining WAP. The method includes selecting one WAP from the set of WAPs based on a random number, the…
CELL TRANSFER APPARATUS WITH HARDWARE STRUCTURE FOR OAM CELL GENERATION
Granted: September 19, 2013
Application Number:
20130242753
An ATM (asynchronous transfer mode) cell transfer apparatus includes an input interface, a switch block, and an OAM cell processing hardware block having a memory unit. The input interface receives an SDH/SONET signal on each of a plurality of first transfer paths to output an input OAM cell corresponding to the SDH/SONET signal to one of a plurality of input ports of the switch block corresponding to the first transfer path for the SDH/SONET signal to be transferred. The switch block…
VIRTUAL LINK AGGREGATION OF NETWORK TRAFFIC IN AN AGGREGATION SWITCH
Granted: September 19, 2013
Application Number:
20130243008
Access switches in a switching system may use virtual aggregated links. When a link between an aggregation switch and an access switch fails, the link failure may be reflected in the virtual aggregated link and data traffic to another access switch may be switched away from the failed switch. A forwarding table in the access switch stores a number of entries that each define a correspondence between destination addresses and an output identifier for the switch. At least a first output…
