Musing: VMware Pays More for AirWatch for VDI than Nicira for SDN

As a network professional, it can be difficult to maintain a sense of perspective in relation to other areas of IT. Certainly, networking is the foundation on which all other services depend but it isn’t all that important to customers overall. VMware announced that it was buying AirWatch to boost it’s VDI capability in mobile […]


Visual Guide to LAG Thinking for Server Admins

When working with Server and VMware people, there is a fair amount of misunderstanding of what is happening in the network. The best technical explanation for what is happening in LAG is, of course described at Ivan Pepelnjak’s IPSpace Blog – vSphere Does Not Need LAG Bandaids – The Network Does while Chris Wahl talks about the server side for VMware but I wanted to add something to the debate.

Musing On the VMware “versus” Cisco Thing

The VMware versus Cisco thing is overstated. It’s easy to conflate issues with all the excitement. The reality is that many customers have Cisco networks and will use VMware. They want Cisco & VMware to be partners. Customer first is corporate policy at both of these companies therefore Cisco & VMware will be partners. VMware has a software defined […]

NSX Standalone Graphic

Uncollected Thoughts on VMware NSX

VMware NSX got it’s official launch this week at VMworld. As a measure of how important VMware regards NSX, the first keynote on the first day is Martin Casado doing the official presentation.

My general view is the NSX is the real deal. I have been talking and writing about OpenFlow since May 2011 and many have complained that SDN isn’t important and I should focus on real network issues. Well, it should now be clear that SDN is a serious strategy issue and we might have been ahead of the market.

Response: OpenStack Isn’t Our Savior from Lock-In or Support Costs — The Lone Sysadmin

Bob Plankers is making the point that the purchasing proprietary corporate software for virtualization (such as VMware vCloud or Citrix Cloudstack) has its own value by avoiding having to build & test your own software: There is an attitude among some now that OpenStack is, or at least will be, our savior from vendor lock-in […]

Arista VTEP VXLAN termination

◎ Comparing Arista and Brocade VXLAN VTEP Hardware Termination

Arista has announced the 7150S device. It’s low latency, 10 Gigabit and VXLAN terminating. What’s interesting to me is that Brocade and Arista are solving the same problem in different ways. Ivan has determined that Arista have decided to use the Intel chipset (I’m guessing the SM6000?) and then enable the tunnel termination features in the software.

VMware’s vSphere Web Client uses Flash ? That’s pretty weak.

I have to agree in part with Trevor Potts at The Register and object to VMware’s solution to the vCenter client platform problem. He got to ask VMware why they are using Flash instead of HTML5 and he runs down the list of options. Java – too much versioning, not much customer love (ie none, […]

Quick Look at networking Features in vSphere 5.1

TL:DR look like the first version of vSphere that has least amount of compromises for large corporates. In other words, it’s more usable than before. Importantly, VMware has delivered a lot of networking features in this release and it would be fair to say that they either “overdue” or “much anticipated”. Take your choice.


Infiniband Over Ethernet is better than Ethernet says VMware

VMware testing shows dramatic performance improvements, especailly CPU reduction, when performing vMotion over RoCEE networks. Implications for future network designs are enormous.

Scaling Virtual Appliances with Embrane

Embrane uses concepts of IP Flows to scale virtual appliances. Embrane does this by managing IP flows and then directing to other appliances, in effect creating what I would call a two tier load balancing.

Show 71 – OpenFlow, SDN, Controllers, VXLAN & Wishing for Fishes

This is the Packet Pushers podcast recorded after the OpenFlow Symposium. We talk extensively about the possible value of OpenFlow, and the limited value of VXLAN. Note especially that VXLAN is not suitable for use as a Layer 2 Data Centre connection – it’s simply not suited to this task.

Top Five Things About VXLAN – And why it’s full of Fail

It’s obvious #VXLAN was conjured up by a cloudtard. Simple minds devise simple solutions without seeing the complex problems they missed. Here are five things that VXLAN tells us about the networking industry.

Outburst: VMware Networking Blog: vSphere 5 New Networking Features – Score D Minus – Must Improv

The VMware networking blog talks about the new networking features in vSphere 5. Well, talk would be overstating it. Mention, maybe. Post It Note, perhaps.

In fact, you could probably burp out the feature list on a single beer.

Soft Switching Fails at Scale

There is a significant camp of software developers who are developing software switching solutions for hypervisors. Which is nice, I guess. The use of software switching in the hypervisor has some good points but, in my view they are heavily outweighed by the bad. I present the use case, and show that software

Controller Based Networks for Data Centres

The current technologies of data centre networks don’t address the fundamental scaling issues. You can’t scale to hundreds of independent switches, we need to have less control planes for more coherent functions. Here is my take on next wave of networking in the data centre beyond DCB and TRILL.

Show 28 – vCloud Network Overlays, OTV, VEPA and networking appliances

It was planned to have a discussion around L2 Data Centre connection the VMworld in Copenhagen but Scott and I could not meetup. So we recorded this podcast to start talking about some of the issues, technology and solutions. I’m not sure that we have all the technology or knowledge in place, so keep watching […]

Why VMware vSwitch’s don’t scale, and isn’t Network switch

VMware heavily promotes it’s vSwitch for use to connect VMs together. Which is OK but it you should NOT PLAN to use vSwitch. Here is why I think

Runt Packet 8 – Virtensys – I/O Virtualisation

In this sponsored Runt Packet we talk to Bob Napaa from Virtensys about their Virtual I/O solution for servers. What’s especially different is that their solution doesn’t use networking…..tune in for mroe details.

The different QoS capabilities of the VMware vSwitch’s

A quick look at the different types of QoS available in the different switch technologies available for vSphere.

VMware vCloud, Isolated Networks and L2 network overlays.

Apparently VMware vCloud product supports the use of “isolated networks”. What I just found out is that Isolated Networks are MAC-in-MAC encapsulated Ethernet. Oh my.

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