Short Take: The Subsidiarity Principle

Short Take – The Subsidiarity Principle

In this Network Collective Short Take, Russ White discusses how the subsidiarity principle can be applied to network design decisions.

Russ White

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History Of Networking – Tony Przygienda – History of BIER

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

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Short Take – Death Of The Seven Layer Model

In this Short Take Russ White argues that the traditional seven layer model for network communication is antiquated and inadequate in explaining modern networking. He also proposes an alternative model and invites everyone to the eventual funeral of the OSI seven layer model.

Russ White

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Episode 26 – Networking War Stories Part Deux

To celebrate the first anniversary of Network Collective, we invite a stellar panel of guests to share their networking war stories.  We discuss challenging outages, difficult problems, and what we’ve learned along the way.

Terry Slattery

Guest

Ethan Banks

Guest

Jordan Martin

Host

Eyvonne Sharp

Host

Russ White

Host

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post Episode 26 – Networking War Stories Part Deux appeared first on Network Collective.

Short Take – Disaggregation and Firewalls

In this Network Collective Short Take, Russ White explores how disaggregation can be expanded to everyone’s favorite security appliance, the firewall.

Russ White

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History Of Networking – Dino Farinacci – History of LISP

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post History Of Networking – Dino Farinacci – History of LISP appeared first on Network Collective.

Short Take – In Defense of Sales Engineers

In this Network Collective short take, Eyvonne discusses the role of a sales engineer.  She highlights the value sales engineers can bring to enterprises and outlines some ways you can get the most out of your relationship with your vendor or VAR sales engineer.

Eyvonne Sharp

Host

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Episode 25 – MPLS Part 1

In a new protocol deep-dive series, Nick Russo and Russ White return to discuss MPLS. In part one, we discuss the primary use cases for MPLS, label allocation, and what SD-WAN means for the future of MPLS.

Show Notes:

1. MPLS solves 3 fundamental problems, individually or in concert
   1. Multi-tenancy/VPNs
   2. Traffic engineering
   3. Fast reroute
2. 4 bytes in a shim header, technically not a label, but we call it that
   1. 20 bits for label value, 2^20 ~= 1 million values (this is important)
   2. 3 bits for EXP, QoS really
   3. 1 S-bit to signal bottom of stack
   4. 8 bits TTL
3. Label depth is theoretically infinite, but some HW platforms have a tolerance
4. Many ways to allocate labels
   1. LDP transport
   2. LDP pseudowire
   3. BGP labeled unicast
   4. BGP based IP VPNs (VPNv4/v6)
   5. BGP pseudowire
   6. SR (really built into OSPF and ISIS for distribution)
   7. RSVP-TE
5. Some forward rules are worth mentioning (basic LDP/BGP-LU environment)
   1. If route learned via IGP/static, LDP label must be used
   2. If route learned via BGP, BGP label must be used
   3. No exceptions
6. Penultimate Hop Popping: second to last hop removes topmost label when signaled with imp-null from last hop along a given LSP, saves a lookup
7. Is MPLS is a tunnel or not:
   1. Continue reading

Short Take – Cisco Disaggregation Announcement

In this Network Collective short take, Jordan Martin shares his thoughts on the recent announcement from Cisco that they will be offering disaggregated solutions. Has Cisco seen the light? Will Cisco abandon hardware completely? Or are the doing all of this for other reasons?

Related Episodes:

• Off the Cuff – Disaggregation
• Episode 18 – Whitebox Networking

Jordan Martin

Host

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History Of Networking – Dinesh Dutt – Divergence of Compute and Networking

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post History Of Networking – Dinesh Dutt – Divergence of Compute and Networking appeared first on Network Collective.

Short Take – Complexity Wormhole

Have you ever found yourself in a complexity wormhole? Do you even know what that means? Russ White takes a look at some obvious symptoms that you’ve gone too far with complexity and proposes some ways to avoid the problem all together.

Russ White

The post Short Take – Complexity Wormhole appeared first on Network Collective.

Network Collective: Building Resilient Networks

On this community roundtable at the Network Collective, we’re talking about building resilient networks with Pete Welcher, Jody Lemoine, and John Herbert. This was a terrific discussion of all those things you might not think about.

Episode 24 – Building Resilient Networks

The need for resiliency in network infrastructure is almost a given, but how do you get there? John Herbert, Jody Lemoine and Pete Welcher join the Network Collective team to talk through the complexities involved in a highly available infrastructure.

We would like to thank Cumulus Networks for sponsoring this episode of Network Collective. Cumulus is offering you, our listeners, a completely free O’Reilly ebook on the topic of BGP in the data center. You can get your copy of this excellent technical resource here: http://cumulusnetworks.com/networkcollectivebgp

John Herbert

Guest

Jody Lemoine

Guest

Pete Welcher

Guest

Jordan Martin

Host

Russ White

Host

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post Episode 24 – Building Resilient Networks appeared first on Network Collective.

Short Take – The Agile State Of Mind

We all know that agile methodologies are incredibly popular in development teams but what does it have to do with networking? In this Network Collective Short Take, Russ White explores how we might use an agile way of thinking to enhance our approach to network design.

Russ White

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History Of Networking – Tony Li – SSE and Hardware Switching

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post History Of Networking – Tony Li – SSE and Hardware Switching appeared first on Network Collective.

Short Take – Side Channel Attack

Do you know what a side channel attack is? Do you know how it relates to you as a Network Engineer? In today’s Network Collective Short Take, Russ White helps explain what a side channel attack is, how it works, and some of the challenges that are inherent in defending against it.

Russ White

The post Short Take – Side Channel Attack appeared first on Network Collective.

Episode 23 – Cloud Connectivity Part II

Miguel Villareal and Scott Wheeler come back and join Network Collective for a second episode, discussing the complexities involved in connecting to cloud infrastructure services and some strategies on how to mitigate them.

We would like to thank Cumulus Networks for sponsoring this episode of Network Collective. Cumulus invites you to find out more about how Linux is changing the data center networking space by downloading their free ebook “Linux Networking 101” here: http://cumulusnetworks.com/NetworkCollectiveLinux

Miguel Villareal

Guest

Scott Wheeler

Guest

Jordan Martin

Host

Eyvonne Sharp

Host

Russ White

Host

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

The post Episode 23 – Cloud Connectivity Part II appeared first on Network Collective.

Short Take – Metaengineering

What’s the difference between being an engineer or a metaengineer? In this Network Collective Short Take, Russ White differentiates between the two and explores when it makes sense to be one or the other.

Russ White

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History Of Networking – Alia Atlas – Fast Reroute

Outro Music:
Danger Storm Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

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