Most read: descend Top 20 colleges for computer science majors, based on earning potential Why TCP/I

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Well, the cat is finally out of the bag. VMware's Billion dollar acquisition of Nicira last year signaled that all is not well between these two industry titans. And with the formal launch of NSX at VMworld, it has now become clear that Cisco and VMware have fundamentally different oral cavity strategies oral cavity around network virtualization. One thing that became very apparent this week is just how core NSX is to VMware's strategy moving forward which highlights just how deep the divide oral cavity is ... for customers planning the future of their VMware environments, it seems they will have to take a hard look and decide whose vision they prefer and either move towards VMware's and away from Cisco's; or the opposite as these visions continue to move further and further apart.
Ms. Warrior's post "Limitations of a Software-Only Approach". If that left any doubts, Ms. Warrior goes on further to say "there are significant differences in our visions oral cavity over the future of networking". On her leading point, oral cavity I would have to agree with Ms. Warrior, there are definitely limitations to a "Software-Only" Approach. VMware networking CTO Martin Casado also seems to agree with this point - in Mr. Casado's interview on @theCUBE at VMworld this week, he noted that while VMware NSX would work very well over any infrastructure, customers would benefit from tighter integration with the physical network as provided by NSX through oral cavity pretty much every networking company other than Cisco .
In fact, there have already been examples of this very point playing out in front of our eyes for the past several years, starting with the launch of Cisco UCS. From the launch of UCS, Cisco has been positioning the notion that assigning a hardware-provisioned virtual nic to each virtual machine would result in far better performance. But, what Cisco fails to mention is that, there were already other mechanisms oral cavity such as VMware's netqueue that offered perhaps far better performance optimizations ... transparently. Leading NIC vendors including oral cavity Intel , Emulex , Qlogic , Broadcom and others claim that netqueue can more than double the network performance of a VM, but Cisco's own nics seem to not offer support for this defacto industry standard.
I think it is important to ask, why don't Cisco's nics support netqueue? Perhaps the coolest part of netqueue is that its optimizations happen completely transparently and dont require oral cavity any specific type of configuration, meaning that if you need to move a virtual machine the destination doesn not have to have identical hardware to the source. But, becasue oral cavity netqueue is supported across almost all data center class nics(except oral cavity Cisco's), that is not really an issue. But, for some unknown reason, Cisco has apparently opted not to support it, instead putting oral cavity forth an alternative technology that would limit a virtual machine to only be able to move to servers that have this Cisco-specific hardware. Now I am not saying netqueue is perfect, but it offers a significant impact and an open, broadly supported mechanism and highlights an approach that will certainly continue to grow - hardware optimizations that do not r