Cisco Technology, Inc.

Samir D Thoria

Ali Sajassi

Mankamana Prasad Mishra

Laxmikantha Reddy Ponnuru

Lukas Krattiger

Manoj Kumar Pandey

Ijsbrand Wijnands

Keyur Patel

Ram Dular Singh

Patrice Brissette

Tapraj Singh

Satish Mahadevan

Swadesh Agrawal

Vivek Agarwal

Krishnaswamy Muddenahally Ananthamurthy

Managa Sunitha Arun Kumar

Sanjay Kumar Hooda

Shyam N Kapadia

Anubhav Gupta

Ramanathan Lakshmikanthan

Rex Emmanuel Fernando

John H W Bettink

Stig Ingvar Venaas

Pradosh Mohapatra

Neeraj Malhotra

Praveen Raju Kariyanahalli

Akash Renukadas Deshpande

Derek Man-Kit Yeung

Michael E Lipman

Pritam Baruah

Ajeet Pal Singh Gill

Mehak Mahajan

Ravi Kiran Chintallapudi

Srilatha Tangirala

Kannan Devarajan

Arul Murugan Manickam

Ravindra Nandalal Rathi

Syam Sundar Appala

Rajesh Sharma

Ramakumara Kariyappa

Kesavan Thiruvenkatasamy

Gowri Mahendran Lingam Chandramohan

Sheikh Qumruzzaman

Rahul Hardikar

Aparna Pattekar

Rajagopalan M Ammanur

Jean-Marc Barozet

Prabhakara R Yellai

Balaji Sundararajan

Pradeep Kumar Kathail

Alfred C Lindem, Iii

Darren Russell Dukes

Mei Zhang

Lester C Ginsberg

Steven W Wood

Satyajit Das

Ganesh Devendrachar

Hamzah Kardame

Mitesh Mukesh Kanjariya

Sourav Sen

Avinash Shah

Alberto Rodriguez-Natal

Luc André Burdet

Suma Kachinthaya

Deepa Rajendra Sangolli

Lukas Krattinger

This disclosure describes techniques for enabling interoperability between asymmetric and symmetric Integrated Routing and Bridging (IRB) modes. An interfacing component may be configured to receive a first route advertisement from a first edge node in a Layer-2 (L2) fabric. The first route advertisement may correspond to an asymmetric format route, for instance. The interfacing component may be further configured to receive a second route advertisement from a second edge node in a L2/Layer-3 (L3) fabric. The second edge node may be configured for symmetric integrated routing and bridging (IRB). The interfacing component may be configured to re-originate the first route and the second route such that the interfacing component is included as a hop in the resultant routes between the L2 fabric and the L2/L3 fabric.

Multiple network interfacing

Systems and methods are provided for receiving bandwidth metrics from a plurality of routers on respective link routes in a network, compiling a link database including the bandwidth metrics of each respective link route in the network, selecting a first designated link path from the link database between a first router and a second router based on an application routing policy, the application routing policy being based on a routing metric, providing a first multiprotocol label switching label based on the first designated link path to the first router of the plurality of routers in the network, and restricting network traffic of the first router to the first designated link path provided in the first multiprotocol label switching label.

Optimizing application performance in hierarchical SD-WAN

In one embodiment, a method includes onboarding, by an edge router, a first tenant from a network management system and determining, by the edge router, a mapping of a tenant identifier associated with the first tenant to a controller identifier associated with a controller. The method also includes reserving, by the edge router, a port number in a kernel for the first tenant and inserting, by the edge router, the tenant identifier into a first control packet. The method further includes communicating, by the edge router, the first control packet to the controller via an encrypted control connection during a first peering session. The first peering session shares the encrypted control connection with a second peering session.

Systems and methods for sharing a control connection

A device transmits, from an overlay service controller associated with an overlay network to an underlay service controller associated with an underlay network and via a semantic structure defined for a service usage API, a request for a service offered by the underlay network. A device may receive, at the overlay service controller, from the underlay service controller and via the service usage API, attachment metadata. A device may map, based on the attachment metadata and via the overlay service controller, an overlay network tunnel to the service in the underlay network to generate an overlay tunnel mapping, wherein the overlay service controller does not have knowledge of details about implementing the service in order to enable the overlay network to consume the service offered by the underlay network. A device may communicate tunneled packets from the overlay network to the underlay network via the overlay tunnel mapping.

System and method of providing a loosely-coupled interface model for obtaining underlay transport service

Present disclosure includes determining, at two or more gateway nodes that each communicate with a plurality of branch nodes and a plurality of resources, dynamically a path between each of the plurality of branch nodes and each of the plurality of resources, wherein the path includes one or more virtual routers; generating, at the two or more gateways, dynamically a path length based upon a number of virtual routers each path traverses; automatically translating the path length to an overlay management protocol route preference for each of the plurality of resources.

Systems and methods for optimizing access to cloud resources using preferential localization

According to some embodiments, a method is performed by a software defined wide area network (SD-WAN) edge router in a hierarchical SD-WAN network comprising a plurality of edge routers and a plurality of border routers. The method comprises: originating a SD-WAN system route for advertising reachability to the edge router, the system route comprising an encryption key associated with the edge router; and transmitting the system route to one or more SD-WAN border routers. The method may further comprise: receiving a packet destined for the edge router from one of the one or more SD-WAN border routers, wherein the packet is at least partially encrypted with the encryption key associated with the edge router; and decrypting the received packet.

Optimizing IPSec for hierarchical SD-WAN

In one embodiment, a method by an edge router configured to operate at a first site of a software-defined wide-area network includes receiving a data packet from a first host located in the first site, where the data packet is destined to a second host located in a second site, determining that an identifier of a second group to which the second host belongs is not available at the edge router, sending a request for an identifier of the second group to a network apparatus, where the request may comprise an address of the second host, receiving a response comprising the identifier of the second group from the network apparatus, determining that the second group is a destination group, applying one or more policies associated with the destination group to the data packet, and causing the data packet to be routed to the second host.

Group-based policies for inter-domain traffic

This disclosure describes methods of operating a leaf node device, such as a switch device, connected to a switch fabric of a network. The leaf node device receives, from another leaf node device via the switch fabric, an indication of a secure route to a host device. In response to receiving the indication of the secure route, the leaf node device creates or updates a routing entry for the host device in a routing information base of the leaf node device and creates or updates an entry for the host device in a Dynamic Host Configuration Protocol (DHCP) snoop database of the leaf node device. The leaf node may thereby communicate with the host device that is attached to the leaf node device as a result of moving from the other leaf node device.

DHCP snooping with host mobility

A computer network efficiently provides a multicast network flow to a multicast recipient across a multihomed network element. The multihomed network element includes network devices that receive multicast data from a source of a multicast network flow. Each particular network device that received the multicast data publishes a notification indicating that the multicast network flow is available from the particular network device. The computer network receives a subscription to the multicast network flow from a multicast recipient, and determines whether to bridge the multicast data across the multihomed network element based on a multicast configuration of the computer network. The multihomed network element provides the multicast data to the multicast recipient from at least one of the particular network devices that received the multicast data from the source of the multicast network flow.

Multicast traffic optimization in multihomed edge network elements

Techniques are described for suppressing data plane traffic using a service monitoring policy for data plane control. If a service provided to a router becomes nonfunctional, preventing the router from being able to forward traffic to a next-hop device, data plane traffic from client devices on the data plane that requires the use of the nonfunctioning service is suppressed. Additionally, new communication pathways to the router that will use the nonfunctioning service are prevented from being established. Traffic is redirected to another router with a functioning service. Thus, traffic that may normally be directed to the router with the nonfunctioning service and not able to be forwarded (e.g., blackholing of data) can be forwarded to the other router.

Service access awareness in a distributed architecture

Systems and techniques are provided for synchronizing DHCP snoop information. In some examples, a method can include, performing, by a first PE device from a plurality of PE devices, DHCP snooping of a first plurality of DHCP messages between a DHCP client and a DHCP server, wherein the plurality of PE devices is part of an ethernet segment for multihoming the DHCP client. In some aspects, the method includes determining, based on snooping the first plurality of DHCP messages, an association between an IP address corresponding to the DHCP client and a MAC address corresponding to the DHCP client. In some examples, the method includes sending, by the first PE device to at least one other PE device from the plurality of PE devices, a first route advertisement that includes the association between the IP address corresponding to the DHCP client and the MAC address corresponding to the DHCP client.

Synchronizing dynamic host configuration protocol snoop information

A system and method for adaptive encryption for SD-WAN includes identifying an encrypted conversational flow and determining whether a duration of the encrypted conversational flow exceeds a threshold. The method also includes selecting a header-less tunnel for the encrypted conversational flow when the duration is more than the threshold. The method further includes transmitting the encrypted conversational flow to an egress router over the selected header-less tunnel.

System and method for adaptive encryption for SD-WAN

In one embodiment, a method is performed. A device may include an interface in communication with a network. The device may determine whether an all-active multi-homed ethernet segment (ES) associated with the interface is enabled. On a condition that an all-active multi-homed ES is enabled, the device may determine an ethernet virtual private network (EVPN) designated forwarder (DF) state of the all-active multi-homed ES. If the all-active multi-homed ES is enabled and has an ethernet virtual private network (EVPN) designated forwarder (DF) state, the device may enter a protocol independent multicast (PIM) designated router (DR) state. If an all-active multi-homed ES is enabled and does not have an EVPN DF state, the device may enter a PIM non-DR state.

Protocol independent multicast (PIM) designated router (DR) election

Techniques for ensuring symmetric forwarding between disparate networks. The techniques may include receiving a gateway preference order associated with a route advertised by an edge node, the edge node associated with a first network. The techniques may also include determining, based at least in part on the gateway preference order, that a gateway node is a more preferred gateway for the route than another gateway node, the gateway node configured to facilitate communications between the first network and a second network. In some examples, the techniques may also include converting the gateway preference order into a metric associated with an IP routing protocol that is in use in the second network. In some examples, the route including the metric may be distributed within the second network such that the gateway node is the more preferred gateway for return traffic of the route.

Symmetric routing in software-defined networks

Growing community of inventors

Sunnyvale, CA, United States of America

Samir D Thoria