Microsoft Pxe Boot

  

  1. Microsoft Dhcp Server Pxe Boot
  2. Microsoft Pxe Boot Image
  3. Setup Pxe Boot Sccm
  4. Pxe Boot Microsoft Surface 3

Server ack from PXE server including options 66 and 67. Start of the bootstrap file download using TFTP (UDP 69 and UDP high level ports) Screenshot: normal PXE boot. You can see in the screenshot that: DHCP offers come from two different machines (.2 is the DHCP,.1 is the PXE host) The last 2 steps run using unicast. I have tried to configure scope options 066 and 067 to my WDS server and boot x64 wdsmgfw.efi file and still the IPv4 PXE boot is looking to the correct server, but still picking up the wdsnbp.com file.

A DHCP Handshake runs through the following steps:

Jun 26, 2014  To PXE boot a Microsoft Surface Pro 3 follow these steps: Plug in the Microsoft Ethernet Adaptor into the USB port I have tried other adaptors that other people say work, but I. I am trying to PXE boot a surface pro 4. It is a brand new device (no computer object in AD or in SCCM). When I try to PXE boot (Press power + Volume up), it goes to the screen: I don't get any prompt to PXE (from IPV4) and it goes straight to IPV6. Note: 1) We are using SCCM 1606. 2) I am using Microsoft's Ethernet to USB adaptor for PXE booting.

DHCP The complete traffic runs on UDP User Datagram Protocol (OSI Layer 4)

Discover
· Client broadcast: asks for IP address
· In the network trace you see a call from 0.0.0.0 to 255.255.255.255
· Runs on port 67 UDP

Nov 05, 2017  no other USB Ethernet will PXE boot the Surface, except for official Microsoft ones You might as well give up trying, it will never ever work. You either need the Surface Pro 2 USB Ethernet (USB2), the Surface Pro 3 USB Ethernet (USB3), the Surface Pro 3 Dock or the Surface Pro 4 Dock. ConfigMgr PXE Boot Log enables you to view PXE boot events on a ConfigMgr PXE Service Point. It can also display any associated records that exist in ConfigMgr for the device that attempted PXE boot.

DHCP Offer
· DHCP server response including IP address for client
· Runs on port 68 UDP

DHCP Request
· Acknowledgement (ack) of the client to the server
· Client requests server ack

DHCP Ack
· Acknowledgement of the IP ownership of the client

This DHCP handshake has nothing to do with PXE at this point. PXE stands for pre-boot execution environment and is a rather old technology. It is in-deph defined and documented by Intel:

PXE does not come with a dedicated boot protocol. It is simply DHCP packets extended with additional DHCP options. It’s formerly known as the bootstrap protocol. If a PXE-enabled network card sends out an DHCP discover package, it will add DHCP option 60, which includes the string “PXEClient:Arch:xxxxx:UNDI:yyyzzz”. Then it waits for DHCP offers.

It will only respond if it gets a DHCP offer including option 60 which means: I am PXE capable and able to send out boot server and boot file information.

The DHCP offer can be splitted into two independent packages, coming from different servers. The DHCP server can send out the DHCP offer containing the clients IP address and the PXE server can send out the DHCP offer containing the option 60.

The PXE client will wait for all needed information up to 60 seconds. DHCP Discover will be retried four times. The four timeouts are 4, 8, 16 and 32 seconds respectively. If the client gets the offer within this timeout, it will proceed with the DHCP request. If not, it will stop with a PXE-MOF error.

(DHCP and PXE service run on different machines)

DHCP Discover
· Client broadcast asking for IP address and PXE-capable DHCP service
· DHCP discover package contains option 60
· DHCP discover uses port 67 UDP

DHCP Offer
· Reply of the DHCP server containing IP address offering on port 68 UDP
· Reply of the DHCP or PXE server containing option 60

DHCP Request
· Client broadcast, ready to acknowledge IP address and boot server (port 67 UDP)

DHCP Ack
· Server broadcast, acknowledge clients IP address and lease (port 68 UDP)

DHCP Request
· Client unicast request for options 66 (boot server) and option 67 (bootstrap file) (port 4011 UDP)
· Unicast addresses server which offered option 60

DHCP Ack
· Server ack from PXE server including options 66 and 67

Start of the bootstrap file download using TFTP (UDP 69 and UDP high level ports)

Screenshot: normal PXE boot

You can see in the screenshot that:
· DHCP offers come from two different machines (.2 is the DHCP, .1 is the PXE host)
· The last 2 steps run using unicast

-->

Applies to: System Center Configuration Manager (Current Branch)

Preboot execution environment (PXE)-initiated OS deployments in Configuration Manager let clients request and deploy operating systems over the network. In this deployment scenario, you send the OS image and the boot images to a PXE-enabled distribution point.

Boot

Note

When you create an OS deployment that targets only x64 BIOS computers, both the x64 boot image and x86 boot image must be available on the distribution point.

You can use PXE-initiated OS deployments in the following scenarios:

Complete the steps in one of the OS deployment scenarios, and then use the sections in this article to prepare for PXE-initiated deployments.

Microsoft Dhcp Server Pxe Boot

Configure at least one distribution point to accept PXE requests

To deploy operating systems to Configuration Manager clients that make PXE boot requests, you must configure one or more distribution points to accept PXE requests. Once you configure the distribution point, it responds to PXE boot requests and determines the appropriate deployment action to take. For more information, see Install or modify a distribution point.

Note

When configuring a single PXE enabled distribution point to support multiple subnets it is not supported to use DHCP options. Configure IP helpers on the routers to allow PXE requests to be forwarded to your PXE enabled distribution points.

Note

In version 1810 and earlier, it's not supported to use the PXE responder without WDS on servers that are also running a DHCP server.

Starting in version 1902, when you enable a PXE responder on a distribution point without Windows Deployment Service, it can now be on the same server as the DHCP service. Add the following settings to support this configuration:

Boot
  • Set the DWord value DoNotListenOnDhcpPort to 1 in the following registry key: HKLMSoftwareMicrosoftSMSDP.
  • Set DHCP option 60 to PXEClient.
  • Restart the SCCMPXE and DHCP services on the server.

Prepare a PXE-enabled boot image

To use PXE to deploy an OS, you must have both x86 and x64 PXE-enabled boot images distributed to one or more PXE-enabled distribution points. Use the information to enable PXE on a boot image and distribute the boot image to distribution points:

  • To enable PXE on a boot image, select Deploy this boot image from the PXE-enabled distribution point from the Data Source tab in the boot image properties.

  • If you change the properties for the boot image, update and redistribute the boot image to distribution points. For more information, see Distribute content.

Manage duplicate hardware identifiers

Configuration Manager may recognize multiple computers as the same device if they have duplicate SMBIOS attributes or you use a shared network adapter. Mitigate these issues by managing duplicate hardware identifiers in hierarchy settings. For more information, see Manage duplicate hardware identifiers.

Create an exclusion list for PXE deployments

Note

In some circumstances, the process to Manage duplicate hardware identifiers may be easier.

The behaviors of each can cause different results in some scenarios. The exclusion list never boots a client with the listed MAC address, no matter what.

The duplicate ID list doesn't use the MAC address to find the task sequence policy for a client. If it matches the SMBIOS ID, or if there's a task sequence policy for unknown machines, the client still boots.

When you deploy operating systems with PXE, you can create an exclusion list on each distribution point. Add the MAC addresses to the exclusion list of the computers you want the distribution point to ignore. Listed computers don't receive the deployment task sequences that Configuration Manager uses for PXE deployment.

Process to create the exclusion list

  1. Create a text file on the distribution point that is enabled for PXE. As an example, name this text file pxeExceptions.txt.

  2. Use a plain text editor, such as Notepad, and add the MAC addresses of the computers to be ignored by the PXE-enabled distribution point. Separate the MAC address values by colons, and enter each address on a separate line. For example: 01:23:45:67:89:ab

  3. Save the text file on the PXE-enabled distribution point site system server. The text file may be saved to any location on the server.

  4. Edit the registry of the PXE-enabled distribution point to create a MACIgnoreListFile registry key. Add the string value of the full path for the text file on the PXE-enabled distribution point site system server. Use the following registry path:

    HKLMSoftwareMicrosoftSMSDP

    Warning

    If you use the Registry Editor incorrectly, you might cause serious problems that may require you to reinstall Windows. Microsoft can't guarantee that you can solve problems that result from using the Registry Editor incorrectly. Use the Registry Editor at your own risk.

  5. Restart the WDS service or PXE responder service after you make this registry change. You don't need to restart the server.

RamDisk TFTP block size and window size

You can customize the RamDisk TFTP block and window sizes for PXE-enabled distribution points. If you've customized your network, a large block or window size could cause the boot image download to fail with a time-out error. The RamDisk TFTP block and window size customizations allow you to optimize TFTP traffic when using PXE to meet your specific network requirements. To determine what configuration is most efficient, test the customized settings in your environment. For more information, see Customize the RamDisk TFTP block size and window size on PXE-enabled distribution points.

Configure deployment settings

To use a PXE-initiated OS deployment, configure the deployment to make the OS available for PXE boot requests. Configure available operating systems on the Deployment Settings tab in the deployment properties. For the Make available to the following setting, select one of the following options:

  • Configuration Manager clients, media, and PXE

  • Only media and PXE

  • Only media and PXE (hidden)

Microsoft Pxe Boot Image

Deploy the task sequence

Setup Pxe Boot Sccm

Deploy the OS to a target collection. For more information, see Deploy a task sequence. When you deploy operating systems by using PXE, you can configure whether the deployment is required or available.

  • Required deployment: Required deployments use PXE without any user intervention. The user can't bypass the PXE boot. However, if the user cancels the PXE boot before the distribution point responds, the OS isn't deployed.

  • Available deployment: Available deployments require that the user is present at the destination computer. A user must press the F12 key to continue the PXE boot process. If a user isn't present to press F12, the computer boots into the current OS, or from the next available boot device.

Pxe Boot Microsoft Surface 3

You can redeploy a required PXE deployment by clearing the status of the last PXE deployment assigned to a Configuration Manager collection or a computer. For more information on the Clear Required PXE Deployments action, see Manage clients or Manage collections. This action resets the status of that deployment and reinstalls the most recent required deployments.

Important

The PXE protocol isn't secure. Make sure that the PXE server and the PXE client are located on a physically secure network, such as in a data center to prevent unauthorized access to your site.

How the boot image is selected for PXE

When a client boots with PXE, Configuration Manager provides the client with a boot image to use. Configuration Manager uses a boot image with an exact architecture match. If a boot image with the exact architecture isn't available, Configuration Manager uses a boot image with a compatible architecture.

The following list provides details about how a boot image is selected for clients booting with PXE:

  1. Configuration Manager looks in the site database for the system record that matches the MAC address or SMBIOS of the client that's trying to boot.

    Note

    If a computer that's assigned to a site boots to PXE for a different site, the policies aren't visible for the computer. For example, if a client is already assigned to site A, the management point and distribution point for site B aren't able to access the policies from site A. The client doesn't successfully PXE boot.

  2. Configuration Manager looks for task sequences that are deployed to the system record found in step 1.

  3. In the list of task sequences found in step 2, Configuration Manager looks for a boot image that matches the architecture of the client that's trying to boot. If a boot image is found with the same architecture, that boot image is used.

    If it finds more than one boot image, it uses the highest or most recent deployment ID. In the case of a multi-site hierarchy, the higher letter site would take precedence in that string comparison. For example, if they're both matched otherwise, a year-old deployment from site ZZZ is selected over yesterday's deployment from site AAA.

  4. If a boot image isn't found with the same architecture, Configuration Manager looks for a boot image that's compatible with the architecture of the client. It looks in the list of task sequences found in step 2. For example, a 64-bit BIOS/MBR client is compatible with 32-bit and 64-bit boot images. A 32-bit BIOS/MBR client is compatible with only 32-bit boot images. UEFI clients are only compatible with matching architecture. A 64-bit UEFI client is compatible with only 64-bit boot images and a 32-bit UEFI client is compatible with only 32-bit boot images.