Segment routing is a mechanism for sending packets over a specific path through the network. There are several ways to do segment routing and multiple elements that go into the technology.

On today’s Heavy Networking podcast we explore segment routing as it’s used in a production network; specifically, ESnet, an international network that moves science data all over the world, including data from the Large Hadron Collider in Europe to scientists in the United States.

Our guest is Nick Buraglio, a network engineer at ESnet and a regular guest on Packet Pushers.

We discuss:

* The flavor of segment routing that ESnet went with and why (SR-MPLS vs. SRv6)

* The problems ESnet was trying to solve

* Whether segment routing reduces complexity

* The role of IS-IS in the network

* Path Computation Element (PCE) and how forwarding decisions are made

* More

Sponsor: Cradlepoint

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Sponsor: Cumulus Networks

Today’s show is sponsored by Cumulus Networks. Build a private cloud environment that is open, modern, and simpler to manage with Cumulus Linux – the Linux-based open network OS that gives you total interoperability, and NetQ – which gives you end-to-end actionable insight from the host to the switch. To learn more about open networking, head to https://cumulusnetworks.com/open.

Show Links:

Heavy Networking 477: Segment Routing Boot Camp With Juniper Networks (Sponsored) – Packet Pushers

A Glimpse At Two Approaches To Segment Routing – Ethan Banks

Show 370: Cisco & IPv6 Segment Routing (Sponsored) – Packet Pushers

Yet another blog about Segment Routing-Part 1 – Diptanshu Singh via Packet Pushers

Yet another blog about Segment Routing-Part 2 : TI-LFA – Diptanshu Singh via Packet Pushers

Yet another blog about Segment Routing-Part 3: SR-TE – Diptanshu Singh via Packet Pushers

Nick Buraglio on Twitter

Forwardingplane.net – Nick Buraglio’s blog