IP helpers assume, however, that you have a homogeneous client base and that EVERYTHING wants to PXE to the same deployment server. Here, I have no control over any of the hundreds of networks but through submitting a ticket to the Networking group, so when WDS first came out we opted to submit just the one ticket to Networking to change the IP helper on specific networks to point to the MS DHCP server we had, and then control options 66 and 67 in each scope and sometimes each IP with reservations. Admittedly, most of what I PXE are servers for deployment, Linux and Windows, some to Cobbler, some to SCCM and some to WDS. Having it this way provides the most flexibility for that. A Windows BIOS client can occupy the IP next to a Windows UEFI client, next to a Linux client.
As for PXE and UEFI, I followed Andreas Hammarskjöld’s white paper on configuring MS DHCP to boot either BIOS or UEFI depending on how the client is set to boot. http://2pintsoftware.com/whitepaper-using-dhcp-uefi-bios-pxe-booting/ It wasn’t too bad to set up and it works. Todd From: listsad...@lists.myitforum.com [mailto:listsad...@lists.myitforum.com] On Behalf Of Marcum, John Sent: Friday, October 7, 2016 7:51 AM To: mssms@lists.myitforum.com Subject: [mssms] RE: IP Helpers for PXE Don’t use DHCP options, set the helpers on the routers. I didn’t have to do anything different to make UEFI work. From: listsad...@lists.myitforum.com<mailto:listsad...@lists.myitforum.com> [mailto:listsad...@lists.myitforum.com] On Behalf Of Merenda, Kenneth Sent: Friday, October 7, 2016 7:43 AM To: mssms@lists.myitforum.com<mailto:mssms@lists.myitforum.com> Subject: [mssms] IP Helpers for PXE [External Email] I have a large environment where the DHCP server and WDS server are not always on the same subnet as the clients. In this case, what IP helpers are needed for PXE of both UEFI and BIOS devices? Currently, we’re using option 66 pointing to the WDS server (SCCM DP), and 67 pointing to SMSBoot\x86\wdsnbp.com. It seems to me that 67 would cause a problem for UEFI, but I’m hesitant to change. Right now, PXE works for BIOS but not UEFI, and I don’t want to break BIOS support just to get UEFI working. SCCM is environment 2012 R2 SP1 CU1 on Server 2008 R2. Thanks, in advance. ----------------------------- Kenneth Merenda ________________________________ Confidentiality Notice: This e-mail is from a law firm and may be protected by the attorney-client or work product privileges. If you have received this message in error, please notify the sender by replying to this e-mail and then delete it from your computer.
