Browsing Posts published in October, 2017

After the VMware vExpert vSAN 2017 and VMware vExpert NSX 2017 awards, this year a new vExpert category has been added: the VMware vExpert Cloud. Like for other technologies vertical, these vExperts has demonstrated significant contributions to the community and a willingness to share their expertise with others. Contributing is not always blogging or Twitter as there are many public speakers, book authors, scriptwriters, VMUG leaders, VMTN community moderators and internal champions among this group.

Seems that there are still some issues with vSphere 6.5, with a possible PSOD (Purple Screen Of the Death) after upgrade to 6.5U1 on ESXi hosts using 10 Gbps NICs. The VMware KB 2151749 describe this issue and explains that this occurs because Netqueue commit phase abruptly stop due to the failure of hardware activation of a Rx queue. As a result, Internal data-structure of the Netqueue layer’s could go out of sync with the device and cause PSOD.

VeeamON is the big event from Veeam (actually only in the US) and VeeamON Tour is usually a smallest (one day) event around the world. But, like happened in the past year, on December 5 there will be also a VeeamON Tour Virtual event: coming right to your desktop, an event on the future of Availability.

Neil Anderson, from Flackbox, has build an amazing free Cisco CCNA Lab Guide recently which can be used to pass the CCNA exam or as a configuration reference for Cisco routers and switches. There’s a few free guides online but they all cover old out of date exam topics and aren’t great quality, but this is guide really complete (350+ pages), up to date, with good quality and simple, which people can use completely for free.

One of the reasons why my blog is starving in the last months is that I’ve started a huge personal project that consumes all my spare free time. This project is a book on VMware vSphere 6.5, really ambitious considering that will be a “Mastering” book, but the title and part of the content were not negotiable.

The latest Adobe Flash update (note that the update has been included also in Microsoft Update) with v 27.0.0.170 make the vSphere Web Client no more usable with all browsers. With Chrome and Firefox you will recognize that the Flash plugin hangs, in Internet Explorer you will have a simple generic error and the browser that will close.

After replacing the SAS card on some ESXi 6.5 nodes, I’ve got a strange issue in the vSAN cluster. The vSAN was healthy and apparently working, but when I try to build new VMs wasn’t working at all, saying that there weren’t enough resources. But there was a lot of free reported space. The reason was that single node, the capacity disks where simply “not Healthy”, but reported as mounted.

There is an interesting #Blogtober campaign for the tech / virtualization community started on October 2017. You can have more information on http://www.blogtober.net web site or on this post (actually the web site just point to this post).

If you are going to using vSphere Replication you will notice, after the deployment of the two virtual appliances a continuous (also each minute) logging of installation activities on all the ESXi hosts in the protected cluster. This is quite annoying but also is going to fill up your log both in the ESXi hosts and in the vCenter database (are all tasks visible in the the vCenter console).

One of the big advantages of the virtual appliance version of VMware vCenter (vCSA) is the ability to update both the OS components and the VMware parts with a simple menu. Just use the administrative UI available at https://vCSA_IP:5480 and login with user root and the password that you have choose during the deployment.

VMware vSAN 6.6 works only in unicast mode, if you have upgrade all the disks to the last v5 format. But recently I’ve got a new cluster, build totally from scratch with latest version, that has switched to multicast mode, with the result of all hosts partitioned at network level.

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