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Tag: vmware

Docker: Where Does It Leave the Network Admin?

t’s the end of the year, and a good time for thinking back. I’m thinking back to a dark past long ago, when physical servers ran server operating systems, and ran applications—when those servers plugged into a switch, and each endpoint was a single server. The network team could see every device, endpoint, or switch, …

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It’s All about Microsegmentation

For the last eighteen months, VMware has been pushing NSX as the third pillar of its software-defined data center (SDDC). NSX has three big selling points that VMware promotes: taking control of the network, automation and orchestration, and microsegmentation. The first two are standard SDDC fare: first, pull the function into software, abstract where necessary, and orchestrate to bring …

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How Will Dell Blend Its SDN Story with Nicira/NSX?

The big story of the last few weeks has been Dell’s $67B acquisition of EMC, and with it, VMware. This is big news for the industry—news that will have ramifications all over the software-defined data centre. One of the most interesting implications is how Dell will reconcile its own SDN strategy with VMware’s NSX vision. Do the …

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VCP Foundation Objective 1.1 Identify vSphere Architecture and Solutions

This is the start of the series digging into the blueprint for the VCP Foundation Exam. This post will deal with “Objective 1.1 Identify vSphere Architecture and Solutions for a given use case”. Let’s get started. Identify available vSphere editions and features There are essentially 11 editions of vSphere available today, although the comparison on …

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VCP Foundation Exam

With the release of vSphere 6, VMware have updated the exam structure as normal. This time there are a couple of interesting (to me at least) changes. The first is to bring the VCP-NV more in line with the other VCP exams. It now has a consistent structure with the DCV (Data Centre), CMA (Cloud) …

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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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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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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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VMware Security Advisory – VMSA-2015-0001.2

I have not done any of these for a while, so here we go, this is a catch all advisory to close down an number of vulnerabilities,  the original advisory was released in january and this one adds a couple of new products that have been patched.  if your product is down as having an …

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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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