Ketan Talaulikar

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Co-Authors

Clarence Filsfils

Cisco Systems (United States)

Peter Pšenák

Comenius University Bratislava

Jeff Tantsura

Ericsson (Sweden)

Gaurav Dawra

Motorola (United States)

Xiaohu Xu

Huawei Technologies (China)

Bruno Decraene

Orange (France)

François Clad

Cisco Systems (United States)

Nikos Triantafillis

Zhenbin Li

Huawei Technologies (China)

Zafar Ali

Cisco Systems (China)

Cooperative Institutions

Cisco Systems (United States)

Cisco Systems (China)

Huawei Technologies (China)

Huawei Technologies (United Kingdom)

Huawei Technologies (France)

Huawei Technologies (United States)

Sun Yat-sen University

AT&T (United States)

Hefei General Machinery Research Institute (China)

Qingdao Institute of Marine Geology

Author Statistics

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RCV: Network Monitoring and Diagnostic System with Interactive User Interface

IEEE Conference Proceedings (2016)

Park Soya Ketan Talaulikar Metz Chris

Interface (matter)

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Citations (0)

Bidirectional Forwarding Detection (BFD) for Segment Routing Policies for Traffic Engineering

Carlos Pignataro Nagendra Kumar Ketan Talaulikar Clarence Filsfils Zafar Ali

Segment Routing (SR) allows a headend node to steer a packet flow along any path using a segment list which is referred to as a SR Policy. Intermediate per-flow states are eliminated thanks to source routing. The header of a packet steered in an SR Policy is augmented with the ordered list of segments associated with that SR Policy. Bidirectional Forwarding Detection (BFD) is used to monitor different kinds of paths between node. BFD mechanisms can be also used to monitor the availability of the path indicated by a SR Policy and to detect any failures. Seamless BFD (S-BFD) extensions provide a simplified mechanism which is suitable for monitoring of paths that are setup dynamically and on a large scale. This document describes the use of Seamless BFD (S-BFD) mechanism to monitor the SR Policies that are used for Traffic Engineering (TE) in SR deployments.

Header

Equal-cost multi-path routing

Source routing

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Citations (4)

IGP Flexible Algorithm

Peter Pšenák Arkadiy Gulko Shraddha Hegde Ketan Talaulikar Clarence Filsfils

IGP protocols traditionally compute best paths over the network based on the IGP metric assigned to the links. Many network deployments use RSVP-TE based or Segment Routing based Traffic Engineering to enforce traffic over a path that is computed using different metrics or constraints than the shortest IGP path. This document proposes a solution that allows IGPs themselves to compute constraint based paths over the network. This document also specifies a way of using Segment Routing (SR) Prefix-SIDs and SRv6 locators to steer packets along the constraint-based paths.

Equal-cost multi-path routing

Prefix

Distance-vector routing protocol

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Citations (3)

BGP Link-State Extensions for BGP-only Fabric

krishnaswamy ananthamurthy Shawn Zandi Ketan Talaulikar Gaurav Dawra Clarence Filsfils

BGP is used as the only routing protocol in some networks today. In such networks, it is useful to get a detailed view of the nodes and underlying links in the topology along with their attributes similar to one available when using link state routing protocols. Such a view of a BGP-only fabric enables use cases like traffic engineering and forwarding of services along paths other than the BGP best path selection. This document defines extensions to the BGP Link-state address-family (BGP-LS) and the procedures for advertisement of the topology in a BGP-only network. It also describes a specific use-case for traffic engineering based on Segment Routing.

Border Gateway Protocol

Default-free zone

Network mapping

Link (geometry)

Interior gateway protocol

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Citations (2)

Advertising L2 Bundle Member Link Attributes in OSPF

Peter Pšenák Ketan Talaulikar

There are deployments where the Layer 3 interface on which OSPF operates is a Layer 2 interface bundle. Existing OSPF advertisements only support advertising link attributes of the Layer 3 interface. If entities external to OSPF wish to control traffic flows on the individual physical links which comprise the Layer 2 interface bundle link attribute information about the bundle members is required. This document introduces the ability for OSPF to advertise the link attributes of layer 2 (L2) Bundle members.

Interface (matter)

Link layer

Link (geometry)

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SR Policy Extensions for Path Segment and Bidirectional Path

Weiqiang Cheng Cheng Li Zhenbin Li Ketan Talaulikar

A Segment Routing (SR) policy is a set of candidate SR paths consisting of one or more segment lists with necessary path attributes. For each SR path, it may also have its own path attributes, and Path Segment is one of them. A Path Segment is defined to identify an SR path, which can be used for performance measurement, path correlation, and end-2-end path protection. Path Segment can be also used to correlate two unidirctional SR paths into a bidirectional SR path which is required in some scenarios, for example, mobile backhaul transport network. This document defines extensions to BGP to distribute SR policies carrying Path Segment and bidirectional path information.

Fast path

Any-angle path planning

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Signaling Maximum SID Depth (MSD) Using the Border Gateway Protocol - Link State

J. Tantsura Uma Chunduri Ketan Talaulikar G. Mirsky Nikos Triantafillis

This document defines a way for a Border Gateway Protocol - Link State (BGP-LS) speaker to advertise multiple types of supported Maximum SID Depths (MSDs) at node and/or link granularity. Such advertisements allow entities (e.g., centralized controllers) to determine whether a particular Segment Identifier (SID) stack can be supported in a given network.

Gateway (web page)

Link (geometry)

10.17487/rfc8814

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BGP Link State Extensions for SRv6

Mach Chen Hani Elmalky Ketan Talaulikar Gaurav Dawra Jim Uttaro

Segment Routing IPv6 (SRv6) allows for a flexible definition of end- to-end paths within various topologies by encoding paths as sequences of topological or functional sub-paths, called segments. These segments are advertised by the various protocols such as BGP, ISIS and OSPFv3. BGP Link-state (BGP-LS) address-family solution for SRv6 is similar to BGP-LS for SR for MPLS dataplane. This draft defines extensions to the BGP-LS to advertise SRv6 Segments along with their functions and other attributes via BGP.

Border Gateway Protocol

Default-free zone

Link (geometry)

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Citations (1)

Distribution of Traffic Engineering Extended Administrative Groups Using the Border Gateway Protocol - Link State (BGP-LS)

J. Tantsura Zidong Wang Qin Wu Ketan Talaulikar

Border Gateway Protocol

Link (geometry)

Gateway (web page)

10.17487/rfc9104

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OSPF Link-Local Signaling (LLS) Extensions for Local Interface ID Advertisement

Ketan Talaulikar Wim Henderickx Padma Pillay-Esnault

Every OSPF interface is assigned an identifier, Interface ID, which uniquely identifies the interface on the router. In some cases it is useful to know the assigned Interface ID on the remote side of the adjacency (Remote Interface ID). This draft describes the extensions to OSPF link-local signalling (LLS) to advertise the Local Interface Identifier.

Link (geometry)

Interface (matter)

10.17487/rfc8510

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