TCP/IP over VXLAN Bandwidth Overheads

A recent 'conversation' around VXLAN encapsulation and MTU with Matt Oswalt got me thinking about this subject recently. My … [Read more...]

Using VRFs to maintain security zones in an Layer 3 datacenter network

Layer 2 Network Diagram

The number of overlay technologies available today for the datacenter are numerous and highly functional. The flexibility … [Read more...]

Healthy Paranoia Show 20: SDN – Heretic of Security

Dune_SDN

The known universe has been ruled by the monolithic network device. In this time, the most precious substance in the … [Read more...]

Show 169 – Cisco FabricPath Deep Dive Part 1

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Cisco FabricPath is a TRILL-based layer 2 forwarding technology that can take the place of spanning-tree. Allowing a … [Read more...]

Network Design Challenge – Small Little Clouds

At work, we've been getting ready to deploy a few different cluster technologies. One is a set of KVM hosts to offer VMaaS … [Read more...]

A Small Yellow Wooden Door: Thinking Practically About SDN

SimpleNetworkZone

As I do most days, I took a walk in the woods at the back of my garden after a hearty dinner. I was quite surprised to come … [Read more...]

Show 135 – Change Control Causes Constipation

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Ethan & I talk about recent events in the industry and their workday. I have a head cold so apologies for the sniffles / … [Read more...]

How to Draw Clear L3 Logical Network Diagrams

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The biggest single problem I'm seeing when working on enterprise networks is the lack of L3 logical network diagrams. Most of … [Read more...]

Healthy Paranoia Show 6: Once Upon a Time, There Was Virtualization…

Unicorn Tears

Yes boys and girls, today we tell a story of clouds. The Packetpushers attack the subject of virtualization security. You'll … [Read more...]

Practical Visibility Fabric – Part 1

Gigamon Port and Network Flow Diagram

Men have become the tools of their tools. - Henry David Thoreau This will be a three part series. This first article will … [Read more...]

Secret Sauce or Cargo Cult Science?

Science is the belief in the ignorance of experts. - Richard Feynman Recently, I was criticized by a vendor's sale rep … [Read more...]

PQ Show 004 – Catalyst 4500X and 4500E – Sponsored

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Sometimes you would think that Campus LANs don't actually exist. In this podcast, we are looking at the Catalyst 4500X … [Read more...]

Show 107 – Cisco Software Defined Networking Strategy with Omar Sultan – Sponsored

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As part of the Packet Pushers Cisco Live 2012 Tour, we sat down with Omar Sultan to provide an overview of Cisco's SDN … [Read more...]

Thin Slicing A Black Swan: the Search For the Unknown Unknowns

Over the last two weeks I've had an ongoing conversation with Derick Winkworth regarding the colossal (and largely … [Read more...]

Show 98 – The Future of TRILL and Spanning Tree – Part 2

TRILL has been on the radar for about three years and while we are seeing some shipping hardware and deployments, it's still … [Read more...]