which technology to be available on the NIC?

Distributed Power Management (DPM) requires which technology to be available on the NIC?




Wake On LAN (WOL)

Once you turn on VMware DRS for your cluster you can enable the cluster for VMware DPM, which allows the power management of ESX hosts within the cluster. You must also ensure that Wake-on-LAN, IPMI, or iLO are functioning properly on your hosts. Only then can VMware DPM automate the power on and power off of ESX hosts using one of those methods.

8 Comments on “which technology to be available on the NIC?

  1. mr_tienvu says:

    D. Wake On LAN (WOL)

    The NICs used by the VMkernel network must have Wake-on-LAN functionality, which is used to bring an ESX Server host up from a powered-off state. Best practice is to test the wake capability on each ESX Server host on which DPM is to be enabled.

    Ref: http://www.vmware.com/support/vi3/doc/whatsnew_esx35_vc25.html

    Ref: Configuring Distributed Power Management

  2. ST says:

    The correct answer is D. The question asks which technology has to be available on the NIC.

    This is from the manual.
    vSphere DPM can use one of three power management protocols to bring a host out of standby mode: Intelligent Platform Management Interface (IPMI), Hewlett-Packard Integrated Lights-Out (iLO), or Wake-On-LAN (WOL)

  3. GM says:

    BMC is not required. BMC can be used but if BMC is not available then it uses WOL for DPM. Read it it is right there for vsphere 5 also.

  4. Haunui says:

    Actually DPM uses both BMC and WOL.

    Both IPMI and iLO require a hardware Baseboard Management Controller (BMC) to provide a gateway for accessing hardware control functions, and allow the interface to be accessed from a remote system using serial or LAN connections. The BMC is powered-on even when the host itself is powered-off. If properly enabled, the BMC can respond to remote power-on commands.

    If you plan to use IPMI or iLO as a wake protocol, you must configure the BMC. BMC configuration steps vary according to model. See your vendor’s documentation for more information. With IPMI, you must also ensure that the BMC LAN channel is configured to be always available and to allow operator-privileged commands. On some IPMI systems, when you enable “IPMI over LAN” you must configure this in the BIOS and specify a particular IPMI account.

    vSphere DPM using only IPMI supports MD5- and plaintext-based authentication, but MD2-based authentication is not supported. vCenter Server uses MD5 if a host’s BMC reports that it is supported and enabled for the Operator role. Otherwise, plaintext-based authentication is used if the BMC reports it is supported and enabled. If neither MD5 nor plaintext authentication is enabled, IPMI cannot be used with the host and vCenter Server attempts to use Wake-on-LAN.

  5. Haunui says:

    And because the question states “which technology to be available on the NIC” the correct answer is D because WOL is a NIC feature

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