NetLdn #23 – 09/09/2021

Location: Zoom

We will once again be combining powers with our NetMcr friends for a joint meeting. We’ll be starting at the slightly later (by NetLdn standards) time of 1930hrs UTC+1.

The meeting will be held online using Zoom. The meeting room ID and password will be shared on the evening of the event to the NetLdn mailing list and in the NetLdn Slack.

Please set your full name in the Zoom client before joining the meeting, they will be validated for admission.

Join from 1915hrs (UTC+1) onward, talks begin promptly at 1930hrs (UTC+1).

Talk 1: TI-LFA FTW

A brief introduction to Segment Routing followed by an in-depth look at LFA technologies – focusing on how TI-LFA can use Segment Routing to provide complete coverage.

Presenter: Steve Crutchley (Claranet)

Talk 2: Snabb: I know someone at an ISP who writes their own network devices

…and they don’t have an army of programmers.

Max will talk about Snabb, a software toolkit for writing carrier grade networking applications that run on x86 servers using a high-level programming language.

He’ll give an overview of what Snabb is and what makes it work, show off how it is used by ISPs, and talk a bit about the current hardware and software ecosystem available to us in the commodity server market.

Presenter: Max Rottenkolber (inter-stellar)

Talk 3: Find out on the night!

The last talk will be disclosed on the night due to the nature of the content.

Presenter: Disclosed at the time

After Talks: Networking for Networkers

Stay in the meeting room and have a free-for-all chit-chat about whatever is on your mind. This is a bring-your-on drinks and nibbles session.

NetLdn #22 – 12/08/21

Location: Zoom

We will once again be combining powers with our NetMcr friends for a joint meeting. We’ll be starting at the slightly later (by NetLdn standards) time of 1930hrs UTC+1.

The meeting will be held online using Zoom. The meeting room ID and password will be shared on the evening of the event to the NetLdn mailing list and in the NetLdn Slack.

Please set your full name in the Zoom client before joining the meeting, they will be validated for admission.

Join from 1915hrs (UTC+1) onward, talks begin promptly at 1930hrs (UTC+1).

Talk 1: Flowhouse – Next Generation Flow Analysis

Oliver will show how Flowhouse helps to provide relevant answers to questions of network operators, instead of plain old flow statistics.

Presenter: Oliver Geiselhardt-Herms

Talk 2: DNAT46 on Linux

Basil will be talking about how Mythic Beasts are building DNAT46, a stateless proxy service to allow IPv4-only clients to reach TCP ports on IPv6-only servers.

Presenter: Basil Fillan (Mythic Beasts)

After Talks: Networking for Networkers

Stay in the meeting room and have a free-for-all chit-chat about whatever is on your mind. This is a bring-your-on drinks and nibbles session.

NetLdn #21 – 08/07/21

Location: Zoom

We will once again be combining powers with our NetMcr friends for a joint meeting. We’ll be starting at the slightly later (by NetLdn standards) time of 1930hrs UTC+1.

The meeting will be held online using Zoom. The meeting room ID and password will be shared on the evening of the event to the NetLdn mailing list and in the NetLdn Slack.

Please set your full name in the Zoom client before joining the meeting, they will be validated for admission.

Join from 1915hrs (UTC+1) onward, talks begin promptly at 1930hrs (UTC+1).

Talk 1: DNS the Hard Way(tm)

Taking something that should be simple, and complicating it to suit project requirements; Richard will discuss various different methods they’ve used to steer and load-balance Voice over IP clients to Session Border Controllers (SBCs).

Presenter: Richard PaTterson

Talk 2: Software development at Netflix

Nat will chat about how Netflix deploys multi-region services in AWS and delivers streaming contents to millions of users daily from their own CDN “Open Connect”, resulting in 15% of all internet traffic. Netflix is famous for its culture of “Freedom and Responsibility”.

Presenter: Nat Morris (Netflix)

After Talks: Networking for Networkers

Stay in the meeting room and have a free-for-all chit-chat about whatever is on your mind. This is a bring-your-on drinks and nibbles session.

NetLdn #20 – 10/06/21

Location: Zoom

We will once again be combining powers with our NetMcr friends for a joint meeting. We’ll be starting at the slightly later (by NetLdn standards) time of 1930hrs UTC+1.

The meeting will be held online using Zoom. The meeting room ID and password will be shared on the evening of the event to the NetLdn mailing list and in the NetLdn Slack.

Please set your full name in the Zoom client before joining the meeting, they will be validated for admission.

Join from 1915hrs (UTC+1) onward, talks begin promptly at 1930hrs (UTC+1).

Talk 1: Traffic patterns from real-time video apps

Realtime video conference apps have significantly different traffic patterns from streamed video. This talk will describe those patterns (UDP, significant uplink usage, latency sensitivity, edge-to-edge) and explain why these engineering choices were made. I’ll discuss the bandwidth estimation and management strategies used in these apps. I’ll also give some pointers as to how to spot this traffic for filtering or prioritisation purposes.

Presenter: Tim Panton (Pipe)

Talk 2: An Evolution Of The Network Engineer

This talk explores what happens when a business grows, and the role of the network becomes critical: you have more servers to connect, more data to transport, more services reliant on each other. You can’t afford to provide a bad experience to your customers, nor “throw more people at the problem” to solve it. You have to move fast and be reliable in today’s world — even when sharks eat your fibre cables.

Your knowledge and skills will be the tools to approach the growth, but you will deal with never-seen-before challenges — including esoteric ones. You will also begin to realise that 1% means thousands, millions or hundreds of millions of people, and indeed, you won’t have time for manual fixes.

We identified common knowledge and skill gaps that Network Engineers have when faced with the challenge of operating a large-scale network. We will explain why they are important and give an approach to bridging them to prepare yourself for a future ahead.

Presenter: Elena Sanchez & Jose Leitao (Facebook)

After Talks: Networking for Networkers

Stay in the meeting room and have a free-for-all chit-chat about whatever is on your mind. This is a bring-your-on drinks and nibbles session.

NetLdn #19 – 13/05/21

Location: Zoom

We will once again be combining powers with our NetMcr friends for a joint meeting. We’ll be starting at the slightly later (by NetLdn standards) time of 1930hrs UTC+1.

The meeting will be held online using Zoom. The meeting room ID and password will be shared on the evening of the event to the NetLdn mailing list and in the NetLdn Slack.

Please set your full name in the Zoom client before joining the meeting, they will be validated for admission.

Join from 1915hrs (UTC+1) onward, talks begin promptly at 1930hrs (UTC+1).

Talk 1: Network Analysis 101 with Batfish

A veritable ‘101’ lesson on the topic of network automation and network analysis, specifically with the open-source project Batfish. The talk will cover an introduction to Batfish, its key strengths and how it can be used to validate various network functions e.g., device configuration, control plane operation, and dataplane reachability.

Presenter: Rick Donato

Talk 2: Ask Me Why I Don’t Like DDoSers

This will be a talk about network security, risk management, cybercrime incident response… and one of Marek’s toughest days in the office for a while. A lot has been said about this talk, and given the rise in ransom-based attacks, it is critical that more discussion is had around how to deal with these situations, when they do inevitably arise.

Presenter: Marek Isalski (Fealix)

After Talks: Networking for Networkers

Stay in the meeting room and have a free-for-all chit-chat about whatever is on your mind. This is a bring-your-on drinks and nibbles session.

NetLdn #18 – 08/04/21

Location: Zoom

We will once again be combining powers with our NetMcr friends for a joint meeting. We’ll be starting at the slightly later (by NetLdn standards) time of 1930hrs UTC.

The meeting will be held online using Zoom. The meeting room ID and password will be shared on the evening of the event to the NetLdn mailing list and in the NetLdn Slack.

Please set your full name in the Zoom client before joining the meeting, they will be validated for admission.

Join from 1915hrs (UTC) onward, talks begin promptly at 1930hrs (UTC).

Talk 1: RF Spectrum for Mobile Networks

Hot off of the press from the recent radio frequency auctions, Andy’s here to give us an update on how the dust has settled on the mobile network frequency allocations in the UK, how that will affect the 4G and 5G networks. There may even be a little speculation on what else may happen in the near future (if we’re very well behaved).

Presenter: Andy Sutton (BT)

Talk 2: Viking Monitoring: A very punny adventure!

Supercomputers! Yes, no, really. York University still maintains a supercomputer, by the name of Viking (of course). But how does one look after such a beast? More precisely, how do you keep track of 175 compute nodes all working together? Nat’s unique insights into how the University monitor their clustered supercomputer is sure to be an enjoyable & informative run through looking after one of the more illusive style of networked systems.

Presenter: Nat Lasseter (York University)

Talk 3: Your Forwarding Plane as Code: How, What, and Why

Aaron will spend ~20 minutes arguing that if you love YAML (who doesn’t?! -ed) then you should love P4. If you’re all about infrastructure as code, then hooooo boy let’s talk forwarding plane!

PRESENTER: Aaron A. Glenn (predicted paths)

After Talks: Networking for Networkers

Stay in the meeting room and have a free-for-all chit-chat about whatever is on your mind. This is a bring-your-on drinks and nibbles session.

NetLdn #17 – 11/03/21

Location: Zoom

We will once again be combining powers with our NetMcr friends for a joint meeting. We’ll be starting at the slightly later (by NetLdn standards) time of 1930hrs UTC.

The meeting will be held online using Zoom. The meeting room ID and password will be shared on the evening of the event to the NetLdn mailing list and in the NetLdn Slack.

Please set your full name in the Zoom client before joining the meeting, they will be validated for admission.

Join from 1915hrs onward, talks begin promptly at 1930hrs.

Talk 1: RFC8981 – Temporary Address Extensions for Stateless Address Autoconfiguration in IPv6

This newly published RFC describes an extension to IPv6 Stateless Address Autoconfiguration, which causes hosts to generate temporary addresses with randomised interface identifiers. Changing addresses over time limits the window of time during which eavesdroppers may perform address-based network-activity correlation. Additionally, it reduces the window of exposure for a host being accessible via the same address over a period of time.

Presenter: Fernando Gont (SI6 Networks)

Talk 2: L2TP 101: On-Ramp to Consuming Wholesale Broadband Services

Marek will talk about Faelix’s experiences setting up and operating wholesale broadband interconnects (with ICUK and Zen), discussing the technical implementation details of the interconnects, and some of the RADIUS and L2TP tricks they’ve had to implement along the way.

Presenter: Marek Isalski (Faelix)

Talk 3: Dark Halo: How a new class of cloud cyber attack is reshaping security

PRESENTER: Aaron Turner (SIRIUX)

After Talks: Networking for Networkers

Stay in the meeting room and have a free-for-all chit-chat about whatever is on your mind. This is a bring-your-on drinks and nibbles session.

NetLdn #12 (Retry) – 08/10/20

Location:

The meeting will be held online using Zoom. The meeting room ID and password will be sent out on the day of the event.

Please join from 1845hrs onwards. 
Talks begin promptly at 1900hrs.

Talk 1: I wanted fast Internet, so I started an ISP

Tim runs a small g-fast ISP for himself and 11 of his neighbours. He’s going to tell the story of how he got there!

Presenter: Tim Cox

NetLdn #12 – 12/03/20

CANCELLED DUE TO COVID-19!

Location:

Upstairs @ The Wheatsheaf
25 Rathbone Place
Fitzrovia, W1T 1JB

Arrival from 1830hrs. 
Quiz begins promptly at 1900hrs.

RSVP: https://www.eventbrite.com/d/united-kingdom–london/netldn/

NetLdn 1st Birthday Pub Quiz

For this special event we’ve got something different lined up. We’re going to have no presentations this time and instead we’re going to have a birthday pub quiz with a bit of extra time for celebration afterwards.

We really appreciate everyone’s participation, and we only reached this fantastic milestone thanks to all of you, so we hope this will be something different and an entertaining evening to show our appreciation.

So, brush up on your networking knowledge of all varieties (wireless, service provider, mobile, security, etc.), your knowledge of NetLdn, and Monty Python if you want to pick up some bonus points!

Presenter: The Quiz Master (@netldn)

NetLdn #11 – 13/02/20

Location:

Upstairs @ The Wheatsheaf
25 Rathbone Place
Fitzrovia, W1T 1JB

Arrival from 1830hrs. 
Talks begin promptly at 1900hrs.

RSVP: https://www.eventbrite.com/d/united-kingdom–london/netldn/

Talk 1: Automating your DC with Intent Based Networking (IBN)

This talks covers building your DC with IBN, augmenting IBN with Ansible, complex analytics, managing the hypervisor / ToR plumbing for NSX-T and Flow, extending micro segmentation policy to encompass bare metal machines and more!

Presenter: Andy Ford (Apstra)

Talk 2: Open Networking – What is it and should I care?

This talk covers tech details on what it can and can’t help with for network engineers from Pete Crocker who has 20 years in networking. A former SP backbone engineer, currently shilling for Cumulus Networks, and happily spending his days automating ALL THE THINGS!

Presenter: Pete Crocker (Cumulus)