Showing posts from 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

Call restriction in Cisco Call Manager

For solving problems related to call restriction in term of "you can call international countries and you can't, you can call only local numbers etc" the best way in call manager configuration is to use calling search space. Following are the basic steps included in this kind of configuration: - define Partition (Class of Control-->Partition...) with appropriate name INT, LOC for example - define calling search space and join predefined partitions that are already created - in Route pattern join adequate partition to it - in Device under local number define calling search space that is already created That's should work now...

Call manager VMware MAC address change

Useful for some Voice tests and Demo labs in virtual environments: - boot the CUCM server with CentOS Disk1 (for me it was CentOS, you could use something else...) - type linux rescue at the boot: prompt use the chroot command to change the root to the CUCM partition - chroot /mnt/sysimage edit the eth0 configuration file - vim /etc/sysconfig/network-scripts/ifcfg-eth0 add or change the MACADDR variable in the ifcfg-eth0 file - MACADDR=xx:xx:xx:xx:xx:xx - save and close (or write and quit) with the :wq option inside vim edit the hardware config file - vim /etc/sysconfig/hwconf change the network.hwaddr variable network.hwaddr: xx:xx:xx:xx:xx:xx - save and close with the :wq option inside vim - exit Linux rescue mode After all, test to see if it's OK now - login at CM console - show network eth0 detail...