Browsing Posts in vSphere

Several people are disabling IPv6 support in ESXi for different reasons: because of the minimum privilege principle (if you are not using a service, why you have to keep it enabled?) or simple because they don’t want any IPv6 address in the network. On Linux and Windows systems is become very difficult disable it and Microsoft itself does not recommend disabling IPV6: ” We do not recommend that you disable IPv6 or its components, or some Windows components may not function.” (https://support.microsoft.com/en-us/kb/929852)

VMware vSphere 6.5 Update 1 has been released on July 27, 2017 with several bug fix, some improvements, but also some interesting changing in maximum numbers (for vCenter in linked-mode) and an interesting news for the Foundation edition that now can manage up to 4 nodes (and not only 3 nodes like in the past). Seems a minor improvement, but demostrare how VMware takes care of its customers. In discussions with customers with smaller environments, VMware has received feedback that 3 host environments were too small in many cases, and just another hosts could be enough […]

The new VMware Virtual SAN (or vSAN) 6.6 adds several enchaments and new features as described in the announce notes. Some interesting news are related to security aspects and how data-at-rest could be protected: one option could be new vSphere 6.5 VM encryption format but now it’s also possible use the native vSAN encryption. Duncan’s post explains the difference of those two approaches.

The new VMware Virtual SAN (or vSAN) 6.6 adds several enchaments and new features as described in the announce notes. Most of those aspects are related to data and cluster resiliency (as expected by a storage solution), including:

VMware has announced the discontinuation of its third party virtual switch (vSwitch) program, and plans to deprecate the VMware vSphere APIs used by third party switches in the release following vSphere 6.5 Update 1. Subsequent vSphere versions will have the third party vSwitch APIs completely removed and third party vSwitches will no longer work. In the past years, VMware has recommended the Nexus 1000V users to move into the VMware vSphere Distributed Switch to avoid future problems, now it’s clear the product version where you can go.

Recently VMware has released a few security patches that will prevent a guest from execute code on the ESXi host and breaking the isolation of a virtual machine. This has been possible based on heap buffer overflow and uninitialized stack memory usage in SVGA, using this bug may allow a guest to execute code on the host. Note that this particular issue impacts ESXi 6.0 or later as also latest version of VMware Workstation, Player and Fusion.

If you are using the legacy VMware vSphere Client on Windows 10 you may have some issues with the VM console that display only a part of the screen and leave blank other parts. You can use other clients (like the Web Client if you have vCenter or the Host UI if you have at least ESXi 6.0U2), but maybe you will have other issues (for example on ESXi 6.0 host UI console mouse may not work well or not at all).

In VMware vSphere there was an hystorical limit of VMDK disks around 2 TB (2 TB – 512 B), but the real “usable” was also less due to the need to make a snapshots on it (if you want use native backup solutions) and depending on the block size (for more informations see Veeam KB 1091). Starting with vSphere 5.5 was finally possibile have bigger disks up to 62 TB (that I will call just “jumbo” disks), but again with several limits describe in VMware KB 2058287 (Support for virtual machine disks larger than 2 TB […]

Now that the new VMware vSphere 6.5 is in GA, most people are starting considering to upgrade (or start from scratch) with this version, instead of vSphere 6.0 (or also 5.5). But please consider this product like a major release, there are several changes, but also new features and scalability properties that make interesting for each new environment, but also for existing customers (with an active subscription if you have a 5.5 version, so that you can also upgrade your 5.x license keys). But like each new version you have to make some consideration first […]

After the official announce at the last VMworld EU, finally VMware vSphere 6.5 is now GA and available for the download. There are several news in the Web client, in new vCenter, in the availability, in VSAN 6.5, in the new security features, new scalability and lot of other stuff.

The new VMware vSphere 6.5, recently available in GA, increase all configuration maximums to new limits (compared to the 6.0 and previous versions). Maybe we can say with no limit, or at least, to be serious, with really huge numbers compared to the actual needs and the existing compunting power. Those new limits are both for scalability aspect, but also to fit with possible performance requirements, considering that a bigger number of business critical applications are going in the virtual environment. For more information see the official docs Minimum & Maximum for VMware vSphere 6.5.

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