The Little Network That Could: Time Infrastructure

Contents Background NTP root servers Bare metal VM hosts NTP pool VMs Monitoring Future plans Background In my recent posts I've been focusing on time synchronisation in virtual machines in public clouds. In my upcoming posts I'm going to cover...

The Little Network That Could: Which IPv6 Address?

An IPv6 addressing detour My next post about The Little Network That Could (TLNTC) was going to be about IPv6 addressing plans - and this post is definitely about IPv6 addressing - but before we can lay out a plan, there's something more...

Tech nibble: Linux bridge VLAN filtering

[For more context: see Tech nibble: KVM host networking topologies] Traditional VLAN bridging and its problems Linux bridges have been the traditional means of connecting KVM guests, and VLAN support is usually the means by which they are...

Tech nibble: KVM host networking topologies

As part of my move to IPv6-only networking, I took some time to re-evaluate the functions and configurations of my VM hosts with the aim of greater segregation between workloads, more predictable failure scenarios, and making sure my IPv6...

Tech nibble: core values of The Little Network That Could

I've previously explained the background and motivation of The Little Network That Could, but I realised that there are some implicit values that permeate my choices which would be worth making explicit. Here are a few which come to mind:...

Pain points: MLD snooping on Linux bridges

It seems that MLD snooping on Linux bridges has broken various parts of IPv6 connectivity over the past 10 years or so. Initial reports of bugs were from 2013, when having MLD snooping enabled on the bridge broke neighbour discovery (breaking...

Pain points. Or, IPv6-only: the ugly bits

Alongside my tech nibbles posts, I'm going to add another type of short post which chronicles the difficulties I've encountered in trying to achieve my IPv6-only end state. These posts may contain somewhat spicy opinions 🌶️ or ranting 🤬. Mostly I...

The Little Network That Could

(Credit: Flickr) Gather 'round, folks - Grandpa has a story to tell. (OK, I'm not a grandpa and I don't expect to be one any time soon, but as I've journeyed back in my memory to write this post, I sure feel old...) For as long as it has been...