RE: [suse-autoinstall] wake on lan

On Tue, 2006-02-14 at 13:37 +0100, Thomas Mieslinger wrote:

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The trick you're looking for is in the pc's bios that you're going to install. For example ibm thinkcentre s50 desktop pcs know two boot

orders:

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standard and automatic bootup. The automatic bootup order is used if

Good to know is also: - it will not reset a powered on client. - "very old" clients may not have a NIC or BIOS with WOL support at all. - WOL support must be enabled on the NIC every time (depends on the NIC) a client is started. Some OS's (windows) do this for you, some linux distributions too by means of scripts. See "ethtool eth0" and "etherwake". -----Original Message----- From: Thomas Mieslinger [mailto:Thomas.Mieslinger@gls-itservices.com] Sent: dinsdag 14 februari 2006 16:06 To: suse-autoinstall@suse.com Subject: Re: [suse-autoinstall] wake on lan It's not really a protocol nor is it a API like PXE is. It is just a ethernet paket that contains a "magic" start sequence, 16 times the Mac adress of the client to wake up and the paket is send to Mac Adress ff:ff:ff:ff:ff:ff -> ie broadcasted. The NIC hardware in the client is permanently powered on and looks at every packet that comes over the wire. If it finds the magic start sequence and its Mac Adress the computer is started. -- GLS IT Services Thomas Mieslinger GLS Germany Str. 1-7 fon: +49 6677 17 463 36286 Neuenstein fax: +49 6677 17 111 Germany eMail: thomas.mieslinger@gls-itservices.com Roger Oberholtzer schrieb am 14.02.2006 15:28:03: the

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system has been woken up over lan. Else it uses standard boot order.

Leave it to IBM. We are using SuperMicro. I will have to look a comparable setting. I am not sure all our SuperMicro MBs support wake-on-lan.

I thought wake-on-lan was some other protocol than PXE. Not exactly how that translates into a boot. But if it looked interesting, I could invest time in finding out. Perhaps it is mainly useful in selecting two different boot device lists as IBM have it.

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regards Thomas -- GLS IT Services Thomas Mieslinger GLS Germany Str. 1-7 fon: +49 6677 17 463 36286 Neuenstein fax: +49 6677 17 111 Germany eMail: thomas.mieslinger@gls-itservices.com

Roger Oberholtzer schrieb am 14.02.2006 12:53:39:

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Has anyone done a network install of SUSE when the client is started with wake-on-lan? Is this even possible?

The reason I ask is I am unsure how you disable a machine from being installed each time it boots. Do you have to turn on/off PXE (or whatever you're using) in the BIOS when you want to change behavior?

Or

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modify the dhcp server's setup? I guess either would work. What are people doing in practice?

-- Roger Oberholtzer

OPQ Systems AB Ramböll Sverige AB Kapellgränd 7 P.O. Box 4205 SE-102 65 Stockholm, Sweden

Tel: Int +46 8-615 60 20 Fax: Int +46 8-31 42 23

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-- Roger Oberholtzer

OPQ Systems AB Ramböll Sverige AB Kapellgränd 7 P.O. Box 4205 SE-102 65 Stockholm, Sweden

Tel: Int +46 8-615 60 20 Fax: Int +46 8-31 42 23

-- To unsubscribe, e-mail: suse-autoinstall-unsubscribe@suse.com For additional commands, e-mail: suse-autoinstall-help@suse.com

-- To unsubscribe, e-mail: suse-autoinstall-unsubscribe@suse.com For additional commands, e-mail: suse-autoinstall-help@suse.com