Lancom : DHCP option 66

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labba7
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Lancom : DHCP option 66

Beitrag von labba7 » 08 Aug 2019, 12:41

hello,

I am working on a pxe project that requires the configuration of the option 66 and 67 of the Lancom DHCP server to allow PCs to boot from the network , but it seems that the lancom is ignoring the option 66 where I specified the IP address of the TFTP server where we have the NBP file.
I don't know why is this behavior of the lancom it s just not reading the ip address of the next server option and it is taking its own ip address as a value .
this is weird can u please help me or suggest some thing to resolve this ?

Thank you so much .

sixty
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Re: Lancom : DHCP option 66

Beitrag von sixty » 08 Aug 2019, 21:49

LANCOM has an built-in BOOTP-Server which is capable of redirecting to next-server and serving boot-images from TFTP.
Maybe this feature "eats up" your manual option 66/67.

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Bernie137
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Re: Lancom : DHCP option 66

Beitrag von Bernie137 » 09 Aug 2019, 07:55

I think PXE works only if you make an entry in table

Code: Alles auswählen

ls /Setup/DHCP/Hosts/
for each client with his MAC address. In LANconfig IPv4 -> Bootp -> Stations.
Man lernt nie aus.

labba7
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Re: Lancom : DHCP option 66

Beitrag von labba7 » 09 Aug 2019, 14:16

Bernie137 hat geschrieben:
09 Aug 2019, 07:55
I think PXE works only if you make an entry in table

Code: Alles auswählen

ls /Setup/DHCP/Hosts/
for each client with his MAC address. In LANconfig IPv4 -> Bootp -> Stations.
yeah That's right it works properly if I specify every station with its Mac address but that's not what I need, in a large network there is a way to boot large nbre of stations without entering any mac address in the lancom, that's what dhcp option 66 does normally, but it's not working with lancomm without any logical reason :/

labba7
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Re: Lancom : DHCP option 66

Beitrag von labba7 » 09 Aug 2019, 14:20

sixty hat geschrieben:
08 Aug 2019, 21:49
LANCOM has an built-in BOOTP-Server which is capable of redirecting to next-server and serving boot-images from TFTP.
Maybe this feature "eats up" your manual option 66/67.
can you help me to figure out what is the right configuration of the built-in BootPserver to redirect to the next-server (TFTP server)
I tried to use Boot Images and Stations under the BootP menu and it worked but I need to do it without using the mac address of the stations the same as the dhcp options 66/67 do.
Thank you.

Fully
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Re: Lancom : DHCP option 66

Beitrag von Fully » 09 Aug 2019, 16:55

Hi labba7,

there is no wildcard for the MAC-Address in the Hosts-Table. I found a "?" in the Relay-Info-List, but of cause there is allways a fixed ip setup. So bootp would never solve your problem.

Back to your question, what is the lancom sending to the client as dhcpoffer when options 66/67 are set?

Fully

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Bernie137
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Re: Lancom : DHCP option 66

Beitrag von Bernie137 » 13 Aug 2019, 10:01

Hi,

Lancom does not support PXE to any hosts. Here is a discussion in german: aktuelle-lancom-router-serie-f41/bootp- ... 9-s15.html

Bernie
Man lernt nie aus.

labba7
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Re: Lancom : DHCP option 66

Beitrag von labba7 » 14 Aug 2019, 11:09

Bernie137 hat geschrieben:
13 Aug 2019, 10:01
Hi,

Lancom does not support PXE to any hosts. Here is a discussion in german: aktuelle-lancom-router-serie-f41/bootp- ... 9-s15.html

Bernie
hello Bernie,

thanks a lot for your post but as I can see in the link in your post , it could be possible to distribute bootimages to any host even with unknown mac address if we enter a general mac address like (00:00:00:00:00:00), but this didn't work with me and I got an error that this address can not be supported by the lancom, I tried even with the broadcast (ff:ff:ff:ff:ff:ff) and it didn't work as well :cry:
it seems that there is noo way to make pxe via lancom, is that true ???

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Bernie137
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Re: Lancom : DHCP option 66

Beitrag von Bernie137 » 14 Aug 2019, 12:41

Hi labba7,

mac address like (00:00:00:00:00:00) or broadcast (ff:ff:ff:ff:ff:ff) does not work. At the time of this other post it was possible to write such a mac address like (00:00:00:00:00:00) in the device but it does not work his time. Now it is not possible to write such mac addresses to the device.
it seems that there is noo way to make pxe via lancom, is that true ???
true. I use MS DHCP for such things.

Bernie
Man lernt nie aus.

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