Hi, @Boopathi S
Thank you for posting in Microsoft Q&A forum.
It seems the client can get contact to DHCP server, but not to PXE server.
You may need to capture packets for further information, you may ask your network team for help.
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.