How I Learned to Hate the DCI: Layer 2 data center interconnects (DCI) is still alive and well. I blame VMware with vMotion and now every other Hypervisor vendor on the planet. Live workload migration is certainly vital to most operations. The further up the stack that happens the more flexibility you have with choosing more layers beneath… Continue reading How I Learned to Hate the DCI
Year: 2012
What are Ethernet, IP and TCP Headers in Wireshark Captures
[fancy_header3 variation=”orange”]What are Ethernet, IP and TCP Headers in Wireshark Captures[/fancy_header3] If I could go back in time when I was a n00b kid wanting to go from zero to a million in networking, the one thing I would change would be spending about 6 months on the fundamentals of networking headers and framing before… Continue reading What are Ethernet, IP and TCP Headers in Wireshark Captures
Why the NOS will decouple
Over the next couple of years some of us expect the networking industry to have some fairly significant changes. There are really two options: A distributed approach we have today or a controller based centralized model. We have today just that, autonomous devices building adjacencies to one another, exchanging what it hopes are the best healthy paths… Continue reading Why the NOS will decouple
Network Processor Units (NPU) FTW
[fancy_header3 variation=”orange”]Network processing Units (NPU) for the Win[/fancy_header3]
OTV configuration notes
Quick notes on OTV. I have not put this on lab gear yet so there may be typos. It does require licensing so make sure you have that budgeted, if not its a 20kish surprise which sucks.
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#enable the feature</br> feature otv</br> #create site Vlan</br> vlan 200</br> name otv-overlay-vlan |
#The Overlay interface ID (int overlay1) must match at both sites. A Vlan can only be assigned to… Continue reading OTV configuration notes
February 2012 SDN Thoughts
I commented on a blog post earlier and I am recording my updated thoughts to review over the next few years to see how wrong I was. My initial business cases still have not changed much from 4 months ago. It has always been and will be about money. What will drive this is the ability to… Continue reading February 2012 SDN Thoughts
OpenVswitch and GRE tunnel notes
Here is a quick post for setting up GRE tunnels on OpenVswitch. Both Vswitch boxes are attached to an OpenFlow Beacon controller. More up to date how-to can be found here: Configuring VXLan and GRE tunnels on OpenvSwitch KVM live storage migration makes an interesting story and run at VMware tools. The dreaded layer2 data… Continue reading OpenVswitch and GRE tunnel notes
Installing Open vSwitch with KVM
[fancy_header3 variation=”orange”]Installing Open vSwitch with KVM[/fancy_header3] This tutorial is for installing Open vSwitch with KVM in order to replace traditional hypervisor Ethernet switching using Linux bridging with Open vSwitch. [titled_box title=”Updates” variation=”steelblue”] For installing Open vSwitch on Ubuntu from package head to Open vSwitch Configure from Packages and Attaching to a Floodlight OpenFlow Controller To… Continue reading Installing Open vSwitch with KVM