Rickard Nobel

Remove the SSH warning in vSphere Client

Rickard Nobel — Sat, 28 Apr 2012 10:05:58 +0000

How to disable the warning in vSphere Client of ESXi Shell and SSH. Having SSH enabled could be very useful for troubleshooting and configuration, but could also expose your ESXi host to attacks. Since ESXi 4.1 it has been easy … Continue reading →

VMware vExpert award 2012

Rickard Nobel — Mon, 23 Apr 2012 17:21:48 +0000

I was very happy and honored when I received the letter from VMware of getting the vExpert award for the year 2012. The award is defined by VMware as the following: “The annual VMware vExpert title is given to individuals … Continue reading →

Vmkernel Jumbo Frames on ESXi 4.1

Rickard Nobel — Sun, 22 Apr 2012 18:57:57 +0000

How to enable Jumbo Frames on ESXi 4.1 through the command line interface and GUI. In ESXi 4.0 the actions for enabling Jumbo Frames on Vmkernel interfaces was a bit difficult, since it was command line only and also was … Continue reading →

Using netstat and arp commands in ESXi 5.0

Rickard Nobel — Sat, 24 Mar 2012 08:54:29 +0000

Some common network tools, like NETSTAT or ARP, are not present in the ESXi 5.0 Shell and SSH command line interface. However, there are almost equivalent tools available through the esxcli command. Netstat is a classic tool available in almost … Continue reading →

Test network performance with the Iperf tool

Rickard Nobel — Tue, 27 Dec 2011 22:15:26 +0000

In this article we shall see how to use iperf to very easily test the maximum throughput in network bandwidth between a server and a client. Iperf is a free and helpful tool, available on multiple platforms, to troubleshoot network … Continue reading →

Windows Server 8: new Task Manager

Rickard Nobel — Wed, 21 Dec 2011 20:05:09 +0000

In the upcoming Windows Server 8 the Task Manager tool is very different from earlier versions. The tool has been completely rewritten with both different counters and a new look. In this blog post we will see how to use … Continue reading →

SCSI Unmap VAAI command removed in ESXi 5 patch

Rickard Nobel — Sun, 18 Dec 2011 10:33:29 +0000

In the VMware ESXi 5.0 patch released on 15 December the VAAI support for Thin Provisioning is now disabled by default. This is due to several reported performance problems. The other VAAI options for cloning and other remains functional as … Continue reading →

Using vSwitch CDP with HP switches

Rickard Nobel — Sun, 11 Dec 2011 22:19:28 +0000

In this blog post we looked at the new support for vendor neutral discovery protocol LLDP in vSphere 5. Unfortunately LLDP is only available on the Distributed Virtal Switches and not for ordinary vSwitch. However, for a long time we … Continue reading →

Using Performance Monitor effectively

Rickard Nobel — Sun, 27 Nov 2011 22:42:55 +0000

How to use Windows Perfmon in an efficient way to troubleshoot performance. For many years the Performance Monitor tool has been available in Windows Server operating systems, and is a great tool with literally thousands of counters, but is sometimes … Continue reading →

Troubleshooting ESXi networking with LLDP

Rickard Nobel — Wed, 16 Nov 2011 23:29:37 +0000

One common issue with networking in virtualized environments is the outgoing ports from the virtual switches to the physical network switches. Configuring with VLANs and similar must be done very carefully to ensure that all ports are correctly setup. It … Continue reading →