Help me. pxe boot fails

Users
1

Usage environment:
maas 3.4.2
dell 750xa
intel scalable 4th generation cpu
bios mode legacy bios

symptoms:
after receiving IP properly with dhcp, the following message is output.

PXELINUX 6.04 lwIP 20191223 Copyright (C) 1994-2015 H. Peter Anvin et al

Failed to load ldlinux.c32
Boot failed: press a key to retry, or wait for reset…

PXE booting is performed normally and commissioning is performed in bios mode uefi.
Other old generation servers operate normally.

2

Could you check the rackd logs?

3

It was an issue with pxe booting.
I tried booting pxe using extenral nic,
I booted pxe using interanl nic and it worked normally.
I solved it myself.