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ibm aix HMC faq

By Darlene Clark,2014-11-13 14:06
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ibm aix HMC faq ...

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     What is the HMC? pSeries LPAR servers

     Why was a Linux base chosen as the operating system on the HMC? Logical partitions

     Can I use an already existing Linux installation for the HMC? DLPAR

     Hardware management Can I install my own applications on the HMC? console

     Why can't I telnet into the HMC? AIX

     Do I have to use the WebSM graphical interface of HMC?

     What are my options for remotely accessing the HMC functions? HMC support

How do I operate the HMC remotely from an AIX system?

     Can an HMC WebSM session being presented in AIX be exported to another non-AIX or non-WebSM machine?

Can I operate the HMC remotely with any version of WebSM?

Can I operate the HMC remotely from a Windows system?

     How does the HMC remember the configuration?

     How do you start the install/upgrade process for the HMC?

     How long does it take to install/re-install the HMC?

     Why does some documentation refer to an "HSC" instead of HMC?

     Is there a screen lock function for the HMC?

     Can the HMCs be configured with 8-port async adapters? Are these needed to configure redundant HMCs?

     How do I install the WebSM PC client?

Question: What is the HMC?

    Answer: The HMC is the IBM Hardware Management Console for pSeries, which is a new management appliance for configuring and controlling pSeries servers. The HMC user interface is based on the WebSM framework, which was originally written for AIX and has now been ported to a Linux base. The

    HMC user functions execute within the WebSM framework. This does not

    mean that users would see the standard set of WebSM AIX functions on the HMC console itself, but rather that the new HMC hardware management applications are presented in a way that is consistent and integrated with AIX management.

Question: Why was a Linux base chosen as the operating system on the HMC?

    Answer: Linux was chosen for its affinity and interoperability with AIX, and because it runs on a variety of standard, low-cost platforms.

Question: Can I use an already existing Linux installation for the HMC?

    Answer: No, the HMC comes preloaded with a selected, preconfigured Linux installation, which has WebSM and the HMC applications already installed on it. It has been specifically packaged as a preinstalled, preconfigured, and pretested management appliance, with the intent to improve ease of installation and use. The objective was to simplify the HMC offering so that it does not become yet one more thing that needs to be managed. As such, appropriate

    Linux updates and configuration changes are pretested and included as part of

    the software updates to the HMC. Adding third-party applications to the HMC is

    not supported.

Question: Can I install my own applications on the HMC?

    Answer: In order to ensure the stability and quality of the HMC, installation of third-party applications onto the HMC is not supported at this time. Likewise,

    application of Linux packages and updates that are not delivered as part of a formal HMC sofware update is not supported. The corrective action for

    problems resulting from such activities will be to reinstall the original HMC preload package.

Question: Why can't I telnet into the HMC?

    Answer: Because the HMC is a specially packaged management appliance, it provides two supported interfaces for remote user access. One is the WebSM graphic user interface, which can be used either locally or remotely, and the other is a set of command line functions for manual invocation or scripting, which can be accessed remotely through either "rexec" or "OpenSSH". Other remote

    services have been deactivated to help ensure HMC security.

Question: Do I have to use the WebSM graphical interface of HMC?

    Answer: No, many of the day-to-day operational command line functions are

    available on the HMC, accessible from a remote system by using rexec or Open secure shell (OpenSSH). However, a number of the more complex HMC

    functions can currently only be accessed through the WebSM interface, because

they would be very complicated to use in command line form. Command line

    functionality will be enhanced over time.

Question: What are my options for remotely accessing the HMC functions?

    Answer: You can access the HMC graphic user interface remotely through the WebSM client that comes as part of AIX, and is also available as an installable

    WebSM PC Client that runs on Windows systems. You can also access a set of

    command line functions remotely through rexec or OpenSSH.

Question: How do I operate the HMC remotely from an AIX system?

    Answer: The preferred method to remotely control the HMC from an AIX system is with the command:

    wsm -host

    When this is started, you will then be asked to log into the HMC with the correct user identification and password. Once this has been authenticated, you will see the console session for the HMC running in your WebSM application window.

Question: Can an HMC WebSM session being presented in AIX be exported to

    another non-AIX or non-WebSM machine?

    Answer: Yes, if the target system supports the export capabilities of X11, one could do this:

    hmc_main - hostname of HMC

    machine_A - hostname of AIX 5.1 (with IY22854) image with WebSM.

    machine_B - hostname of X11 compatible system to which you want to export the display

    Steps are:

    ; On machine_B: xhost + machine_A

    ; On machine_A: export DISPLAY=machine_B:0

    ; On machine_A: wsm -host hmc_main

    Then the HMC login session will appear on machine_B's display.

Question: Can I operate the HMC remotely with any version of WebSM?

    Answer: No, due to WebSM framework changes, HMC and remote instances of HMC will only work with the WebSM delivered with AIX 5.1 with

    IY22854. Those running AIX 5100-01 or AIX 4.3 will not be able to execute "wsm -host hmc_main".

Question: Can I operate the HMC remotely from a Windows system?

    Answer: Yes, you can remotely access the HMC WebSM interface from a Windows NT or Windows 2000 system by installing the WebSM PC Client.

    For HMCs with a release level prior to R3V1.0 (10/2002), you must perform the following steps:

    ; Set up a webserver on an AIX 5.1 with IY22854 image that also has

    WebSM configured and knows where it is installed. Use config assist for

    this.

    ; On the Windows PC, start a web browser.

    ; In the PC web browser, enter the following URL for the AIX image that you

    set up in the first step: http:///pc_client/pc_client.html

    ; If this is the first time you've accessed the PC Client code, you will be asked

    if you want to download the PC Client environment. This will use a Java

    InstallShield application to install the PC Client application onto your PC.

    ; Install the PC Client code, and it will leave an icon on your desktop.

    ; Click on the icon to start the WebSM PC Client.

    ; Enter the IP address or hostname of the HMC, and a valid HMC user ID and

    password.

    For HMCs at release R3V1.0 (10/2002) or later, you can install the PC Client software directly from the HMC itself:

    ; On the Windows PC, start a web browser

    ; In the PC web browser, enter the following URL, based on the HMC

    hostname: http://tname_or_IP_address>/remote_client.html

    ; Follow the same instructions as above to install the client application

    Note that if this is being done across a modem dial-up network connection, this

    will take some time for a set of plugins and java objects to be transmitted from

    HMC to your PC. Also note that every time you stop the WebSM session and restart it from your PC, the same download of plugins and objects will occur again.

Question: How does the HMC remember the configuration?

    Answer: When the HMC is started, it first checks to see if there is recorded information about the attached pSeries LPAR servers (and their associated LPAR configurations) in its stored memory. If this information is not found, it

    queries the pSeries LPAR servers, which stores configuration information in the Non-Volatile RAM (NVRAM) of the system. This information is then

    resynchronized with the local copy on the HMC, and is kept up to date with whatever configuration changes are requested by the HMC. Therefore, if for

    some reason you have to re-install or replace an HMC, it will automatically reacquire the LPAR configuration information from the pSeries LPAR servers.

Question: How do you start the install/upgrade process for the HMC?

    Answer: Place the install/upgrade CD-ROM into the drive on the HMC, then in

    the firmware instruct the HMC system to boot from CD-ROM. The upgrade

    CD-ROM will boot to give you an option to either upgrade or re-install the HMC

    program.

Question: How long does it take to install/re-install the HMC?

    Answer: It takes approximately 10 minutes to do a complete install of the

    HMC. When complete, you can restore customized data that was saved in a previous backup operation, if available. Otherwise, the user must go into the

    HMC menus and configure the HMC network parameters, define additional

    users, and set up any other HMC configuration settings.

Question: Why does some documentation refer to an "HSC" instead of HMC?

    Answer: Just prior to announcement of the pSeries LPAR servers, a decision

    was made to officially name the new console the "IBM Hardware Management

    Console for pSeries", although it had been previously referred to as the Hardware System Console. You might see some references in older material where the term "HSC" is still used. It means the same thing as HMC, and refers to exactly the same console package.

Question: Is there a screen lock function for the HMC?

    Answer: Yes, a screen lock function was added in the R2V1.0 release (4/2002). However, keep in mind that if you have multiple administrative users of the console, they may not be able to log in if they do not know the password of the user who locked the screen.

Question: Can the HMCs be configured with 8-port async adapters? Are these

    needed to configure redundant HMCs?

    Answer: The 8-port card (for the HMC) is available as feature order and should be ordered if needed. The card would be needed if customers desire to control multiple p690s from a single HMC. A single pSeries LPAR server connected

    redundantly to two or more HMCs does not require this feature. If the feature is

    ordered, the HMC system comes with the card fully configured.

Question: How do I install the WebSM PC client?

    Answer: There are two methods to install the WebSM PC client on a Windows system:

Remotely:

    ; Set up a webserver on an AIX 5.1 with the IY22854 image that the server

    also has WebSM configured and knows where it is installed. Use config

    assist for this.

    ; On the Windows PC, start a web browser.

    ; In the PC web browser, enter the following URL for the AIX image you set

    up in the first step: http:///pc_client/pc_client.html.

    ; For SSL connectivity, you would then install the additional PC Client

    security package:

    http:///pc_client/pc_client_security.html.

    ; If this is the first time you've accessed the PC Client, you will be asked if you

    want to download the PC Client environment. This will use a Java

    InstallShield application to install the PC Client onto your PC.

    ; Install the PC Client code, and it will leave an icon on your desktop.

    Remotely:

    ; On the windows PC, start a web browser .

    ; In the PC web browser, enter the following URL based on the HMC

    hostname: http:///remote_client.html

    ; Install the PC Client code. It will leave an icon on your desktop.

    Locally:

    ; On the WebSM server, go to the directory /usr/websm/pc_client.

    ; If this directory is not available or is empty, be sure you have the following

    filesets installed on the WebSM server:

     PC Client source file Fileset Needed Description

    setup.exe sysmgt.websm.webaccess Contains the PC

    Client

    Needed to enable

    secure setupsec-ex.exe sysmgt.websm.security connections

    (export version)

    setupsec-us.exe sysmgt.websm.security-us Needed to enable

    secure

    connections (U.S.

    version)

    ; Copy the files: setup.exe or setupsec-ex.exe or setupsec-us.exe onto

    removable media

    ; Take the setup file from removable media to the Windows client and

    execute the setup scripts, according to the required security needs of the

    client.

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