Skip site navigation (1)Skip section navigation (2)
Date:      Wed, 2 Mar 2011 18:12:28 -0500
From:      Maxim Khitrov <max@mxcrypt.com>
To:        Nerius Landys <nlandys@gmail.com>
Cc:        David Brodbeck <gull@gull.us>, freebsd-questions@freebsd.org
Subject:   Re: Finish upgrading remote server without physically being there?
Message-ID:  <AANLkTikj7-wXv3vErm6oOOXvPZEPCaqVEjnHWfycin7z@mail.gmail.com>
In-Reply-To: <AANLkTi=5YXqgyy_+SMdYof3Y3neaatoC7C0sb-tdhxkX@mail.gmail.com>
References:  <AANLkTin39JjTsts2WwgDUV2QfZL745D0P3DqTkko8TFq@mail.gmail.com> <4D6E6B16.7010508@my.gd> <AANLkTin7sHXsLwBBUmHinDaB3FLOH25_CDy4v82gKFjw@mail.gmail.com> <AANLkTikq1-CKnwHRahTE+Ta5KLP=8qpUG8WzBrpP=d8n@mail.gmail.com> <AANLkTikFNnV-V82Ucncy_cM0VwiNif6r8DHB9DfMDNvC@mail.gmail.com> <AANLkTi=5YXqgyy_+SMdYof3Y3neaatoC7C0sb-tdhxkX@mail.gmail.com>

Next in thread | Previous in thread | Raw E-Mail | Index | Archive | Help
On Wed, Mar 2, 2011 at 5:18 PM, Nerius Landys <nlandys@gmail.com> wrote:
>> On Wed, Mar 2, 2011 at 8:24 AM, Nerius Landys <nlandys@gmail.com> wrote:
>>> Another way to do this, but is quite rare, is to log in via serial
>>> console. =C2=A0This requires you to configure serial logins to your ser=
ver
>>> (quite easy, but you should test it first) and it requires the data
>>> center to somehow make it possible to log in via serial console. =C2=A0=
That
>>> is that part that is quite rare.
>>
>> It's become less rare as more and more servers are coming with IPMI
>> devices. =C2=A0Serial-over-LAN can be tough to set up properly, but once
>> set up it works quite well.
>
> Actually the guy who hosts my servers at m5hosting.com was showing and
> telling be about some BIOS-over-lan or something like that. =C2=A0I can't
> remember exactly what the feature was, but certain motherboards (some
> Supermicro models in particular) let you access "something" over LAN.
> Maybe that something was BIOS or serial console, or video console, I
> can't remember. =C2=A0IIRC when you access that stuff over lan it is like=
 a
> mini HTTP server and sends you some Java applet or something. =C2=A0Prett=
y
> neat.

I just got a new Supermicro Atom board a few days ago (X7SPA-HF-D525).
It has a Nuvoton BMC chip that is attached to LAN1 and provides IPMI
and KVM-over-IP functionality. The chip gets its own IP address
(separate from em0 in FreeBSD) and is powered whenever the power cord
is plugged-in.

As a result, you have some really useful functionality such as power
control (turn the server on/off remotely), access to sensors (MB & CPU
temperatures, voltages, chassis intrusion), text console, and KVM
console.

KVM console is accessed using a Java application that has to be
installed on the client. It's pretty much identical to having a
physical monitor and keyboard attached, in that you can control the
system from the moment that it turns on, including going into BIOS.
The only glitch I found so far is that the connection freezes for a
few seconds while FreeBSD initializes em0 during boot. After that
everything is fine.

- Max



Want to link to this message? Use this URL: <http://docs.FreeBSD.org/cgi/mid.cgi?AANLkTikj7-wXv3vErm6oOOXvPZEPCaqVEjnHWfycin7z>