Using multiple ethernet virtual private network (EVPN) routes for corresponding service interfaces of a subscriber interface
Granted: April 5, 2022
Patent Number:
11296908
Techniques are disclosed for an Ethernet Virtual Private Network (EVPN) Virtual Private Wire Service (VPWS) network with service interface-aware forwarding. In one example, a first network device signals to a second network device, using EVPN route advertisements, a multi-service service tunnel to transport network packets for a plurality of services. The services are identifiable by virtual local area network (VLAN) identifiers in the packets. The first network device is configured with…
Optical multicast switch with broadcast capability
Granted: April 5, 2022
Patent Number:
11296811
An apparatus includes a first input port, a first switch, and a second switch. The first switch and the second input port are in optical communication with the first input port. The apparatus also includes a second input port, a third switch, and a fourth switch. The third switch and the fourth switch are in optical communication with the second input port. Each switch is switchable between a first state to pass optical signals and a second state to block optical signals. The apparatus…
Managing satellite devices within a branch network
Granted: April 5, 2022
Patent Number:
11296783
This disclosure is related to devices, systems, and techniques for using an aggregation device to manage satellite devices that are coupled to host devices. For example, a system includes a set of satellite devices providing switching functionality and an aggregation device configured to communicate with an orchestrator of a wide area network (WAN), where the aggregation device serves as a master switch and is coupled to the set of satellite devices via a set of cascade ports. The…
Apparatus, system, and method for correcting slow field-replaceable units in network devices
Granted: April 5, 2022
Patent Number:
11294761
A disclosed method may include (1) identifying a set of field-replaceable units installed on a network device, (2) monitoring the set of FRUs for flapping that renders any of the FRUs temporarily inoperable, (3) detecting at least one flap in which an FRU within the set (A) experiences a fault that renders the FRU temporarily inoperable and (B) subsequently overcomes the fault to resume operability, (4) determining that the FRU is deficient based at least in part on at least one…
Emulating output queued behavior in a virtual output queue switch
Granted: March 29, 2022
Patent Number:
11290395
A system and method for routing network packets. A switch fabric connects a plurality of forwarding units, including an egress forwarding unit and two or more ingress forwarding units, each ingress forwarding unit forwarding network packets to the egress forwarding unit via the switch fabric. The egress forwarding unit includes a scheduler and an output queue. Each ingress forwarding unit includes a Virtual Output Queue (VOQ) connected to the output queue and a VOQ manager. The scheduler…
Prioritized formation of BGP sessions
Granted: March 29, 2022
Patent Number:
11290376
A network device is described that includes one or more processors configured to select a prioritized sub-set of a plurality of routing protocol sessions based on peer priority information. The one or more processors are configured to establish one or more routing protocol sessions of the prioritized sub-set. The one or more processors are configured to, in response to determining that a threshold for establishing the prioritized sub-set of the plurality of routing protocol sessions is…
Interactive user interfaces for displaying features of an optimized network plan
Granted: March 29, 2022
Patent Number:
11290348
A device receives network data associated with a network that includes network devices interconnected by links, and receives constraints. The device determines potential network plans for the network based on the constraints and the network data, and identifies a potential network plan that minimizes costs associated with operating the network. The device aggregates the network data for the potential network plan to generate first aggregated data, and generates a first user interface…
Mapped register access by microcontrollers
Granted: March 29, 2022
Patent Number:
11288215
A microcontroller can interact with external ASICs using a multi-serial peripheral interface. The ASICs and the microcontroller can be included in an electrical device or an optical-electrical device. The microcontroller can implement the interface to access the registers of the different ASICs in bulk interactions, including a bulk status request, bulk configuration setting, and bulk data reads.
Model driven intent policy conflict detection and resolution through graph analysis
Granted: March 22, 2022
Patent Number:
11283691
A method includes maintaining, by a controller device that manages a plurality of network devices, a data structure and receiving, by the controller device, an indication of a stateful intent. The method further includes generating, by the controller device, a logical packet based on the stateful intent and determining, by the controller device, a dependent intent of the data structure based on the logical packet. The method further includes determining that the dependent intent…
Network functions virtualization (NFV) backplane on forwarding microchip
Granted: March 22, 2022
Patent Number:
11283732
Techniques are disclosed for using a forwarding microchip to implement a network functions virtualization (NFV) backplane within a network device. In one example, processing circuitry of a forwarding microchip establishes a respective logical connection between each of a plurality of virtual ports of the forwarding microchip and each of a plurality of virtual ports configured for respective software-implemented virtual network functions (VNFs) executing on the network device. The…
Forwarding detection of an aggregated interface
Granted: March 22, 2022
Patent Number:
11283672
The techniques describe detecting connectivity failure of an aggregated interface. To monitor connectivity of the aggregated interface, a packet processor of a plurality of packet processors is set as a session master responsible for managing an active forwarding plane connectivity detection session with a peer session master node. The other local packet processors of the virtual network node are selected as session standby nodes that each have a passive forwarding plane connectivity…
Moving application containers across compute nodes
Granted: March 22, 2022
Patent Number:
11281492
In general, this disclosure describes techniques for seamlessly migrating containers among or within computing infrastructures so as to preserve the integrity of data, the configurations, and the availability of the attached storage volumes for the containers. For example, a controller having a distributed software architecture may orchestrate, according to container migration workflow, components of the container migration application to accomplish a set of container migration tasks for…
Distributing service function chain data and service function instance data in a network
Granted: March 15, 2022
Patent Number:
11277338
In some examples, a computing device comprises a first service function instance to apply a service function and a service function forwarder to: receive a first layer 3 routing protocol route advertisement that includes service function instance data for a second service function instance, the service function instance data indicating a service function type and a service identifier for the service function instance; receive a second layer 3 routing protocol route advertisement that…
Using and processing per slice segment identifiers in a network employing segment routing
Granted: March 15, 2022
Patent Number:
11277334
The same prefix segment identifier (SID) may be configured and/or used for either (A) more than one prefix within an interior gateway protocol (IGP) domain, or (B) one prefix with more than one path computation algorithm within the IGP domain by: (a) receiving, by a node in the IGP domain, an IGP advertisement including both (1) a prefix SID and a segment routing global block (SRGB) slice identifier; (b) determining whether or not the SRGB slice identified by the SRGB slice identifier is…
Using anycast as an abstract next hop (ANH) to reduce information related to border gateway protocl (BGP) next hops received by autonomous system border routers (ASBRs) and/or to improve BGP path convergence
Granted: March 15, 2022
Patent Number:
11277328
An autonomous system border router (ASBR) provided in a domain in which routers share an anycast address, may perform a method comprising: (a) receiving, from an exterior Border Gateway Protocol (eBGP) peer, first reachability information for a first prefix, the first reachability information including a first next hop (NH) address; (b) communicating first link state information about the first prefix to another router in the domain, the first link state information associating the first…
Dashboard for display of state information in a graphic representation of network topology
Granted: March 15, 2022
Patent Number:
11277315
Techniques to display a graphic representation of a computer network topology are described. In one example, a network device is configured to generate an output comprising a graphic representation of a topology of a computer network, the computer network comprising compute nodes interconnected by a packet-based communications network provided by a set of network devices, wherein the policy controller is further configured to: identify, amongst the compute nodes or the network devices, a…
Methods and apparatus related to a flexible data center security architecture
Granted: March 8, 2022
Patent Number:
11271871
In one embodiment, edge devices can be configured to be coupled to a multi-stage switch fabric and peripheral processing devices. The edge devices and the multi-stage switch fabric can collectively define a single logical entity. A first edge device from the edge devices can be configured to be coupled to a first peripheral processing device from the peripheral processing devices. The second edge device from the edge devices can be configured to be coupled to a second peripheral…
Service-based tunnel selection scheme for mapping services to tunnels
Granted: March 8, 2022
Patent Number:
11271849
Techniques are disclosed for service-based tunnel selection for forwarding network traffic. In one example, a network device obtains, based on service parameters associated with a network service, a tunnel selection scheme. The tunnel selection scheme identifies a primary mapping mode including a primary service color for mapping the network service to a primary service color transport tunnel and at least one fallback service color for mapping the network service to at least one fallback…
Failure impact analysis of network events
Granted: March 8, 2022
Patent Number:
11269711
Failure impact analysis (or “impact analysis”) is a process that involves identifying effects of a network event that are may or will results from the network event. In one example, this disclosure describes a method that includes generating, by a control system managing a resource group, a resource graph that models resource and event dependencies between a plurality of resources within the resource group; detecting, by the control system, a first event affecting a first resource of…
Communicating state information in distributed operating systems
Granted: March 1, 2022
Patent Number:
11265216
In general, techniques are described for communicating state information in distribute operating system. A network device comprises a first hardware node and a second hardware node. The first hardware node may execute a first instance of a distributed operating system, and maintain a first data structure that stores a plurality of objects defining a portion of state information. The second hardware node may execute a second instance of the distributed operating system, and maintain a…
