Clik here to view.
Misunderstandings About IPv6
IPv6 has been defined for over decade yet the protocol lacks the years of operational experience of its predecessor. IPv4 is well understood in terms of behavior, troubleshooting, and best practices....
View ArticleClik here to view.
The Perils of a Hasty IPv6 Deployment
If World IPv6 Day and other recent IPv6 publicity have convinced you that your network needs IPv6 now, I offer this advice– carefully plan your IPv6 deployment. Many of us have experienced the thrill...
View ArticleClik here to view.
Virtualization in the Network Designer’s Toolbox
I’ve found virtualization increasingly useful in my work. I thought I’d share my observations on effectively using virtualization for feature testing, architecture validation, and learning....
View ArticleClik here to view.
Operations and IPv4/v6 Feature Parity
In previous posts, I’ve made the argument that even small gaps in IPv4/v6 feature parity can create problems. I’ll use this post to discuss Operations and provide an example of an IPv6-related minor...
View ArticleClik here to view.
IPv6 in Ubuntu Natty Narwhal
I always considered Linux to be a leader in IPv6; the first IPv6 code was added to the kernel in 1996. I’ve recently noticed that the several Linux distributions do not support IPv6 in a way that...
View ArticleClik here to view.
How to Share Content over IPv6 with AWS EC2
Although EC2 instances are not IPv6-capable as of this writing, Amazon has implemented IPv6 for its US East (Northern Virginia) and EU (Ireland) Elastic Load Balancers. I’ll demonstrate how to make...
View ArticleClik here to view.
The Case for IP Backhaul in Cisco’s IP Journal
Carrier Ethernet is an interim step toward true IP-centricity in mobile networks. Along with the IP-enablement of alternative access vendor (AAV) networks, some architectural changes are needed in the...
View ArticleClik here to view.
The AWS VPC and the Network Engineer
Amazon AWS is doing amazing things with its IaaS platform. As a networking guy, I find the networking features very impressive. AWS made a wise choice in using Layer 3 as the networking foundation. I...
View ArticleClik here to view.
IPv6 – Just 96 More Bits?
My favorite professor in college joked that the answer to most questions in computer science is, “It depends.” How true. I’ve found few absolutes in my years working on IP networks. If you compare IPv6...
View ArticleClik here to view.
Layer 2 Oriented Designs Fail at Internet Scale
This post’s title summarizes a tenet of designing large IP networks. Layer 3 networks have numerous advantages in efficient use of available paths, troubleshooting (think visibility), and fault domain...
View Article