Category: Network Virtualization

Jul 03

NSX Packet Walks – North/South Traffic

This is my final port in the NSX Packet walk series. So far I have discussed only so called “East/West” traffic. That is traffic which is moving from one VM, or physical machine, in our network to another. This traffic will never leave the datacenter, and in a lot of cases, will never leave the …

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May 05

NSX Packet Walks – VLAN Bridge

This is the fourth post in the NSX Packet Walks series. You probably want to start at the first post. Up to now we have focused on the traffic from one VM to another VM somewhere within the NSX system, as well as how traffic moves between physical hosts. But what if you’re data centre …

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Apr 20

NSX Packet Walks – Replication Modes

This is the third post in the NSX Packet Walks series. You probably want to start at the first post or the second post. Up to now we have focused on the traffic from one VM to another VM somewhere within the NSX system. I have skipped over the way traffic is distributed between hosts, …

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Apr 14

NSX Packet Walks Continued

This post is a continuation of the last post where I discussed a very simple virtual network, and a very simple VXLAN environment. If you haven’t already, you will want to read that post first. In this post I’m going to step it up a gear and introduce a virtual distributed router to the mix. …

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Mar 15

NSX Packet Walks

I was once asked an interview question that was a very simple question with an interesting answer: How does a switch pass packets. I’m going to start in this blog post, with that question, but in a virtual environment. Then I’m going to extrapolate to a couple of NSX situations that I find quite interesting.

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Dec 12

My VCPN610 Experience

This morning I took the VCPN610 Exam according to plan. What didn’t go according to plan was getting a score of 290 when I needed 300 to pass. So near, and yet so very very far.

May 29

Cisco ACI: Is It Wham! or Sam Cooke?

An odd little title, I think you will agree, but consider this: Wham! had a hit with “Freedom” and Sam Cooke sang “Chain Gang,” and I think you can now see my thought process. This post is going to investigate not the technical capabilities of Cisco’s Application Centric Infrastructure (ACI), but rather what its market …

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Mar 04

Software-Defined-Networking (SDN): What is it?

SDN is getting a lot of hype at the moment. Coupled with its kissing cousin, network virtualization, it is all the buzz. So what exactly is it?