Sometimes you can see plenty of strange entries while observing vmkernel.log related to FCoE. It won’t be unusual if you use FCoE. However, if you don’t you could be a little bit curious or even worried about it, the timeouts or “link down” entries aren’t normal for most of vSphere Admins. The problem could be seen when you are using some kinds of converged network cards. In my case it was HPE C7000 with Virtual Connects and Qlogic 57840. It’s…
You can observe some random and intermittent loss of connection to ESXi 6.0 host running on Dell servers (both Rack and Blade). It’s caused by a bug with Cisco Discovery Protocol /Link Layer Discovery Protocol. It can be also seen while generating VMware support log bundle because during this process these protocol are also used to include information about the network. What are these protocols for? Both of them perform similar roles in the local area network. They are…
Virtual SAN provides the Storage Performance Proactive Tests which lets you to check parameters of your environment in an easy way. You just need few clicks to run a test. Well, we can see a lot of tests from nested labs in the Internet, however there are not so many real examples. I decided to share some results of such a real environment which consists 5 ESXi hosts. Each is equipped with 1x SSD Disk 1,92 TB and 5x HDD…