Showing posts from August, 2010

iSCSI storage - enable JUMBO frames for ESXi 4

You must create the vSwitch and change the MTU to 9000.  For this example, vSwitch7 will be the name you would replace with your own:     esxcfg-vswitch -a vSwitch7 Then, set the MTU of the vSwitch:    esxcfg-vswitch -m 9000 vSwitch7    esxcfg-vswitch -l - will list all the vSwitches on actual ESXi. It should look something like this:    Switch Name    Num Ports   Used Ports  Configured Ports  MTU     Uplinks    vSwitch7             64                  1            64                 9000 iSCSI access is controlled by a VMkernel interface and assigned to a port group on the vSwitch. So create the portgroup:    esxcfg-vswitch -A vSwitch7 Then create the VMkernel interface:    esxcfg-vmknic -a -i -n -m 9000 If you named the port group "iSCSI_storage", for example, and your IP is, the command would be like this:    esxcfg-vmknic -a -i -n -m 9000 iSCSI_storage The last step is to add a physical NIC to the vSwitch.  This can be done

Backup ESXi firmware (configuration) with PowerCLI

Login directly to ESXi (or through vCenter server) with PowerCLI shell:    Connect-VIserver -Server IP_address See help from cmdlet Set-VMHostFirmware :    Get-Help Set-VMHostFirmware No more PERL scripts and nothing else...just PowerCLI and go... For restore procedure you must put ESXi host into MAINTENANCE mode. Example: BACKUP: Set-VMHostFirmware -VMHost esxi_IP_address -BackupConfiguration -DestinationPath C:\ -Server vCenter_IP_address RESTORE: Set-VMHostFirmware -VMHost esxi_IP_address -Restore -SourcePath C:\ -HostUser -HostPassword -Server vCenter_IP_address