Recent Posts

IPv6 and vSphere 4.1

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Those of you who read the “What’s new in Networking in vSphere 4.1” would have noticed that vSphere 4.1 is currently undergoing IPv6 conformance testing for the NIST Host Profile. (a little bit of recent history: the IPv6-ready program under the US JITC and US DoD was cancelled and replaced by the US NIST/USGv6 Conformance Read more...

Under the Covers with VMware FT (Fault Tolerance)

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By any measure, FT (Fault Tolerance) is a ground-breaking technology. Introduced a year ago with vSphere 4.0, FT enables an application to continue uninterrupted even after a complete and catastrophic physical server failure. But how does it work? What is the impact or requirement upon the network? Dan Scales, Mike Nelson, and Ganesh Venkitachalam from Read more...

Got Network I/O Control?

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vSphere 4.1 launched today with a bunch of great new features and improved performance. Network I/O Control (NetIOC) was the major feature enhancement for networking. NetIOC is a must have for anyone using or considering 10GigE. Why NetIOC? NetIOC enables you to guarantee service levels (bandwidth) for particular vSphere traffic types. For example, if you’re Read more...

Using 10GigE with VMware vDS and Cisco Nexus 1000V

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In a blog post last month titled, “vSphere loves 10GigE”, I mentioned a deployment paper was in the works. The paper titled, “Deploying 10 Gigabit Ethernet on VMware vSphere 4.0 with Cisco Nexus 1000V and VMware vNetwork Distributed Switches”, is now posted on Cisco website. We will follow suit in the coming week and post Read more...

More on HP Virtual Connect

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I wrote a blog entry earlier this year around using HP Flex-10 with vSphere … or perhaps I should say I wrote a pointer to an entry on Flex-10 written by Kenneth van Ditmarsch at virtualkenneth.com I thought I’d add a few more papers that cover Virtual Connect with vSphere… HP Virtual Connect Ethernet Cookbook Read more...

FCoE Webcast coming up

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My previous post was on why vSphere loves 10GigE. You can converge all those 1GigE links into a pair of 10GigE to not only improve your network performance but reduce the complexity of your infrastructure. FCoE takes reduction of complexity one step further in eliminating the HBA, Fibre Channel links and adjacent Fibre Channel switches/directors Read more...

vSphere loves 10GigE

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It didn’t seem so long ago that 10GigE was just “one of those things we’ll look at soon”. A show of hands at our recent internal TechSummit conference suggests almost every customer is either implementing 10GigE in production or kicking the 10GigE tires in their pre-production labs. Why 10GigE? 10GigE has a couple of obvious Read more...

Security Hardening Guide for vSphere 4.0 Published

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The final release of the vSphere 4.0 Security Hardening Guide has hit the streets. This is a comprehensive 100+ page guide with more than 100 guidelines on hardening vSphere 4.0 components in a production environment. You can read Charu’s post over on the VMware Security blog, or go directly here to download the paper from Read more...

Jumbo Frames in vSphere 4.0

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In vSphere 4.0, we introduced support for jumbo frames on vmkernel interfaces with ESX 4.0 and ESXi 4.0. This meant you could use jumbo frames for iSCSI, NFS, FT, and vMotion in both releases. Unfortunately, we had a minor documentation bug that stated jumbo frames were not supported in ESXi. This has since been corrected. Read more...

F5 Accelerates Long Distance vMotion

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At VMworld last year, F5 previewed and demonstrated their Long Distance vMotion solution. Since then, F5 has worked on integrating the solution into their BIG-IP product and leverage their new WAN Optimization Module (WOM). What does this mean for VMware customers? vMotion over distance on a traditional WAN is constrained by bandwidth and latency. Any Read more...