No DHCP response (Multiple VLAN setup)
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Useful for all I suppose:
Curl Error List is found here.
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Based on what I see that would appear to be the case… except I know its not the case. When the system is pxe booting I am able to ping from the fog server to the client. While at the main fog menu I am able to ping from fog server to client. The moment I select full host registration I am no longer able to ping from fog server to client.
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@mhanna said in No DHCP response (Multiple VLAN setup):
When the system is pxe booting I am able to ping from the fog server to the client. While at the main fog menu I am able to ping from fog server to client.
This is because the iPXE (fog menu kernel is running at this point in the booting process)
The moment I select full host registration I am no longer able to ping from fog server to client.
At this point, the FOS engine is running and not able to pick up (or think’s it can’t pick up) a dhcp address.
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Understood. I was trying to illustrate that there did not appear to be a communication issue between devices on the vlan in question by stateing that they communicate just fine up to a certain point.
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The question here, is more about if the client can ping the FOG Server.
When you are at the FOG PXE Menu, IP Helpers within the route help direct the traffic on where to get an IP Address. This will typically work, but requires the route be accessible by the FOG Server. The Same, however, path must be setup in reverse.
So it’s fully possible to enable a DHCP server to receive dhcp, but the client side receiving that IP still needs a way to communicate to the fog server.
You’re certain the iPXE IP Address issued is the same scope the FOS Engine is receiving?
I ask the questions because, you state the FOG Server can ping the host machine when it’s in PXE mode, but in the FOS System, it’s unable to communicate to the Client Machine anymore. This leads me to think it’s getting an IP Address that can’t route anywhere.
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@Tom-Elliott said in No DHCP response (Multiple VLAN setup):
the host machine when it’s in PXE mode, but in the FOS System, it’s unable to communicate to the Client Machine anymore. This leads me to think it’s getting an IP Address that can’t route anywhere.
Its getting the same IP in PXE mode as it is when I select the option to register host. They exact same IP. Which is in the same vlan as the fog server… they are actually only 1 IP apart. I can have a continuous ping going and from the FOG server I can get replies up to the point there I select the register host option. At that point the replies stop. I can then reboot the client and once it start the PXE boot process the pings start replying again… from the same IP. Its really odd… while in PXE it gets DHCP with all the correct information… but once we go anywhere in the Fog menu we lose all connectivity. When running the route command on the client once in debug I see the following:
Destination Gateway Genmask
default 192.168.91.193 0.0.0.0
192.168.91.192 * 255.255.255.192192.168.91.193 is the correct gateway for this vlan but is unpingable from the client at this point.
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@mhanna Is the subnet mask supposed to be 255.255.255.192 or 255.255.255.128? (Is the subnet mask setup properly in more direct fashion).
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@Tom-Elliott said in No DHCP response (Multiple VLAN setup):
55.255.255.192
It is supposed to be .192. This is also reflected on the fog server as well as all DHCP clients on that vlan.
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So doing a quick calculation.
Gateway IP address shoudl be 192.168.91.193, the broadcast address for the network should be 192.168.91.255. The network address would be 192.168.91.192.
This leaves a network range applicable to:
192.168.91.194 through 192.168.91.254.The IP Address the machine is getting is within this scope?
This almost seems like the nic goes down and fails to come back up. Is the NIC on the machine a USB NIC?
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The IP the machine is getting both in PXE and when selecting any menu option is 192.168.91.242… within the specified range for that vlan. FOG server is on 192.168.91.243. No, the nic is an onboard broadcom nic on a dell optiplex 580
