Cisco Technology, Inc.

Darren Russell Dukes

Clarence Filsfils

Patrice Brissette

Amila Pradeep Kumara Tharaperiya Gamage

Pablo Camarillo Garvia

Francois Clad

Gaurav Dawra

Sanjay Kumar Hooda

Anand K Oswal

Rex Emmanuel Fernando

Oliver James Bull

Michel Dean Taillon

Kausik Majumdar

Fabio Rodolfo Maino

Ahmed Refaat Bashandy

Syed Kamran Raza

Jisu Bhattacharya

Alberto Rodriguez-Natal

Jeevan Sharma

Carlos M Pignataro

Nagendra Kumar Nainar

Samir D Thoria

Rakesh Gandhi

Jaganbabu Rajamanickam

Madhan Sankaranarayanan

Steven W Wood

Jean-Marc Barozet

Radu Teodor Valceanu

Systems, methods, and computer-readable media are disclosed for a scalable process for validating multiple paths used for routing network traffic in a network using segment routing. In one aspect, a method includes identifying, by a first network hop, one or more second network hops, for each of the one or more second network hops, determining a corresponding flow label, the corresponding flow label including a corresponding test packet for validating packet forwarding between the first network hop and a corresponding second network hop, and performing a validation process for validating packet forwarding from the first network hop to the corresponding second network hop using at least the corresponding flow label. The method further includes determining a queue of additional network hops to be validated based on a result of the validation process, and iteratively validating packet forwarding for each additional network hop in the queue.

Systems and methods for scalable validation of multiple paths in a network using segment routing

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

Techniques for enabling a network access provider to make automatic Software as a Service (SaaS) optimization decisions. Among other things, the techniques may include determining a SaaS application that is being accessed by client endpoints via flows through a network access provider. The techniques may also include determining, based at least in part on a policy associated with the network access provider, whether to enable network optimizations for traffic through the network access provider to the SaaS application. Based at least in part on a determination that the network optimizations are to be enabled for the traffic to the SaaS application, the techniques may include installing a service definition associated with the SaaS application in a service policy database of the network access provider.

Automatic SAAS optimization

In one embodiment, Ethernet Virtual Private Network (EVPN) is implemented using Internet Protocol Version 6 (IPv6) Segment Routing (SRv6) underlay network and SRv6-enhanced Border Gateway Protocol (BGP) signaling. A particular route associated with a particular Internet Protocol Version 6 (IPv6) Segment Routing (SRv6) Segment Identifier (SID) is advertised in a particular route advertisement message of a routing protocol (e.g., BGP). The SID includes encoding representing a particular Ethernet Virtual Private Network (EVPN) Layer 2 (L2) flooding Segment Routing end function of the particular router and a particular Ethernet Segment Identifier (ESI), with the particular SID including a routable prefix to the particular router. The particular router receives a particular packet including the particular SID; and in response, the particular router performs the particular EVPN end function on the particular packet.

Ethernet virtual private network using segment routing

An enterprise controller of an enterprise network sends to a service gateway of a service provider network a request for network slice information about network slices provisioned on a data plane of the service provider network. Responsive to the sending, the enterprise controller receives from the service gateway the network slice information including identifiers of and properties associated with the network slices. Responsive to receiving a request for the network slice information from a network device at a border of a forwarding plane of the enterprise network, the enterprise controller sends the network slice information to the network device to cause the network device to perform configuring network traffic in the forwarding plane with identifiers of ones of the network slices that match the network traffic, and to perform forwarding the network traffic configured with the identifiers to the data plane of the service provider network.

Enabling enterprise segmentation with 5G slices in a service provider network

Techniques for optimizing segment routing (SR) paths using segment identifiers (SIDs) are disclosed, including determining a packet is to be sent from a first node to a second node of a network using an SR method. The techniques may also include determining a segment quantization factor that is representative of a first number of SIDs that are included in a segment quantization interval. Based at least in part on the segment quantization factor and a cost constraint, an SR path defined by a second number of SIDs to send the packet may be determined. The second number of SIDs may be associated with maximizing the SIDs included in individual ones of segment quantization intervals. The techniques further include modifying the packet to include at least the second number of SIDs and causing the packet to flow from the first node to the second node via the SR path.

Optimizing segment routing paths using segment identifiers

According to certain embodiments, a method determines a number of transmitted packets that a first node transmitted to a second node via a link and a number of received packets that the second node received from the first node via the link. The number of transmitted packets and the number of received packets are determined for each interval of a plurality of intervals. The method further comprises determining a plurality of packet loss values. Each packet loss value is associated with a respective interval and is determined based on the number of transmitted packets and the number of received packets associated with the respective interval. The method further comprises determining variability based on the plurality of packet loss values and configuring a value associated with reordering detection based on whether the variability exceeds a threshold.

Loss measurement on a link with reordering

Techniques for utilizing edge nodes disposed throughout a multi-site cloud computing network to generate a probe packet including indicators that guarantee the use of forward and return route paths to accurately measure the network performance of a route path between two endpoints in a wide area network (WAN). An edge node disposed in a site of the multi-site cloud computing network may store in virtual memory associated with the edge node, a mapping between route paths, usable to send data from the edge node to remote edge nodes in remote sites, and route indicators. A probe packet may include a data portion for measuring the network performance of a route path, a portion including local and remote discriminators, and/or an inner and an outer header.

Selecting forwarding paths and return paths in a networked environment

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Ottawa, Canada

Darren Russell Dukes