SCCM OSD Boot issue

Question

Hi,

I am facing boot issue in SCCM OSD. My SCCM Server and PXE boot enabled distribution point is in same subnet but the clients are in different subnet. When I try to deploy OSD task sequence to unknown computer it shows below error.

Answer 1

Hi,

Thanks for posting in TechNet.

The client is unable to download network boot program (NBP) and boot files. Based on my experience, you need to configure the IP Helpers correctly. IP Helpers must be configured on the routers if any of the DHCP server, the client computer, or the Configuration Manager server that is running WDS and the PXE-enabled DP are on separate subnets or VLANs.

1. IP Helpers are necessary because the PXE request that is generated by the client computer is a broadcast that doesn't travel outside the local subnet or VLAN. If the DHCP server or the WDS/PXE-enabled DP aren't on the same subnet or VLAN as the client computer, they will not see or hear the PXE request broadcast from the client. Therefore, the servers will not respond to the PXE request.
2. For the scenario that are unable to use IP Helpers, we can deploy both DHCP server and PXE-enabled DP on the seperate subnet.

For more information, please refer to:
Troubleshooting PXE boot issues in Configuration Manager
Troubleshooting PXE boot issues in Configuration Manager

Thanks for your time.
 
Best regards,
Simon