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amtterm - Serial-over-lan (sol) client for Intel AMT, console version…  more info»

amt-howto.7.gz

amt-howto(7)                                            amt-howto(7)



NAME
       amt-howto - Intel AMT with linux mini howto

DESCRIPTION
   What is AMT and why I should care?
       AMT  stands  for "Active Management Technology".  It provides
       some remote management facilities.  They are handled  by  the
       hardware  and  firmware,  thus they work independant from the
       operation system.  Means: It works before Linux bootet up  to
       the point where it activated the network interface.  It works
       even  when  your  most  recent  test  kernel  deadlocked  the
       machine.    Which  makes  it  quite  useful  for  development
       machines ...

       Intel AMT is part of the vPro Platform.  Recent intel-chipset
       based  business machines should have it.  My fairly new Intel
       SDV machine has it too.


   Documentation
       Look here for documentation beyond this mini howto:
       http://www.intel.com/technology/platform-technology/intel-
       amt/
       Most  useful to get started: "Intel AMT Deployment and Refer‐
       ence Guide"


   Very short AMT enabling instructions.
       Enter BIOS Setup.
              * Enable AMT

       Enter ME (Management Extention) Setup.  Ctrl-P  hotkey  works
       for me.
              * Login, factory default password is "admin".
              *  Change  password.   Trivial  ones  don't work, must
              include upper- and lowercase letters, digits,  special
              characters.
              * Enable AMT Managment.

       Reboot, Enter ME Setup again with AMT enabled.
              * Configure AMT (hostname, network config, ...)
              * Use SMB (Small Business) management mode.  The other
              one (Enterprise) requires Active Directory Service In‐
              frastructure,  you  don't  want that, at least not for
              your first steps ...


   Testing AMT
       Take your browser, point it to http://machine:16992/.  If you
       configured  AMT to use DHCP (which is the default) the OS and
       the management stack share the same IP address.

       You must do that from a remote host  as  the  NIC  intercepts
       network  packets for AMT, thus it doesn't work from the local
       machine as the packets never pass the NIC  then.   If  every‐
       thing  is  fine  you'll see a greeting page with a button for
       login.

       You can login now, using "admin" as username and the password
       configured during setup.  You'll see some pages with informa‐
       tions about the machine.  You can also  change  AMT  settings
       here.


   Control Machine
       You might have noticed already while browing the pages: There
       is a "Remote Control" page.  You can remotely reset and  pow‐
       ercycle  the  machine  there,  thus recover the machine after
       booting a b0rken kernel, without having someone walk over  to
       the machine and hit the reset button.


   Serial-over-LAN (SOL) console
       AMT also provides a virtual serial port which can be accessed
       via network.  That gives  you  a  serial  console  without  a
       serial cable to another machine.

       If you have activated AMT and SOL the linux kernel should see
       an additional serial port, like this on my machine:

         [root@xeni ~]# dmesg | grep ttyS2
         0000:00:03.3: ttyS2 at I/O 0xe000 (irq = 169) is a 16550A

       Edit initab, add a line like this:

         T2:2345:respawn:/sbin/getty ttyS2 115200 vt100-nav

       You should add the serial port to /etc/securetty too  so  you
       are  able  to login as root.  Reload inittab ("init q").  Use
       amtterm to connect.  Tap  enter.   You  should  see  a  login
       prompt now and be able to login.

       You can also use that device as console for the linux kernel,
       using the usual "console=ttyS2,115200"  kernel  command  line
       argument, so you see the boot messages (and kernel Oopses, if
       any).

       You can tell grub to use that serial device, so you can  pick
       a  working kernel for the next boot.  Usual commands from the
       grub manual, except that you need "--port=0xe000" instead  of
       "--unit=0"  due  to  the non-standard I/O port for the serial
       line (my machine, yours might use another port,  check  linux
       kernel boot messages).

       The     magic    command    for    the    Xen    kernel    is
       "com1=115200,8n1,0xe000,0" (again, you might have to  replace
       the I/O port).  The final '0' disables the IRQ, otherwise the
       Xen kernel hangs at boot after enabling interrupts.


   Fun with Xen and AMT
       The AMT network stack seems to become slightly confused  when
       running on a Xen host in DHCP mode.  Everything works fine as
       long as only Dom0 runs.  But if one starts a guest  OS  (with
       bridged  networking)  AMT  suddenly changes the IP address to
       the one the guest aquired via DHCP.

       It is probably a good idea to assign  a  separate  static  IP
       address  to  AMT  then.  I didn't manage to switch my machine
       from DHCP to static IP yet though, the BIOS refuses to accept
       the settings.  The error message doesn't indicate why.


   More fun with AMT
       You might want to download the DTK (Developer Toolkit, source
       code is available too) and play with it.  The .exe is a self-
       extracting rar archive and can be unpacked on linux using the
       unrar utility.  The  Switchbox  comes  with  a  linux  binary
       (additionally to the Windows stuff).  The GUI tools are writ‐
       ten in C#.  Trying to make them fly with mono didn't work for
       me though (mono version 1.2.3 as shipped with Fedora 7).


SEE ALSO
       amtterm(1), gamt(1), amttool(1)

       http://www.intel.com/technology/platform-technology/intel-
       amt/

WRITTEN BY
       Gerd Hoffmann <kraxel@redhat.com>



                       (c) 2007 Gerd Hoffmann           amt-howto(7)
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