Those issues you might only find by trail and error. Again closely watch the NIC LEDs while booting up. Some network cards don't seem to play nicely when it comes to auto-negotiation while PXE booting. Configure your main switch to use RSTP (rapid spanning tree protocol) or configure your client ports with port-fast setting.
Since the booting process is fast, by the time the switch goes into the forwarding state it's too late for the client to get an IP via DHCP when trying to PXE boot. No packets will be delivered while the port is not in forwarding state yet. If spanning tree is enabled, in normal mode, it takes about 30 seconds to the switch port to move to a forwarding state. STP is a layer 2 (MAC) protocol to prevent from loops within your network.
This is fine if your network equipment is configured correctly but It might cause trouble if you have the old version of the so called spanning tree protocol (STP) enabled. It turns on and off a couple of times while booting because the NIC is being re-initialized more than once. Please keep that in mind when you run into trouble! When turning the client on keep an eye on the LED of you network interface card (NIC).
Image capture could not open a connection Patch#
And I really mean this! We have seen very strange issues where clients miss DHCP or even just randomly fail - only because the patch cable used was not in a good condition. Each one of these transitions causes the network link light to "wink" or go out for a second or two as the new booting kernel configures the network interface.įirst of all make sure the client is connected to the network in which your FOG server resides. PXE ROM -> iPXE -> linux kernel/FOG target OS (FOS).
Auto-negotiation issue (try configuring static speed instead of auto-negotiation for that port).Spanning tree issue (make sure to configure RSTP and/or "port fast").Layer 1 issue like cable (don't laugh - this has cost a couple of people many hours).Here is a quick listing of things people mostly run into when having trouble with the boot process - we'll dive into the details later on: 5 Register the Client with the FOG Server.
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