I have a problem with the binary PXEBOOT and the nfs / diskless setup setup. Unfortunately, PXEBOOT loads the kernel with i219LM NICs very slowly. It takes up to 15 minutes to load the kernel. Compared to a Realtek or i210 / i211 NIC, it only takes 2 minutes to load the kernel.
BTX loader 1.00 BTX version is 1.02
/boot/kernel/kernel text=0xed9008 data=0x117d28+0x176650 syms=[0x8+0x137988+0x8+0x1515f8]
Are you really sure your problem is caused by different NICs ?
I had the same problem and the slowness came from incoming ARPs. In a network without ARP traffic pxeboot had normal speed.
I could solve my problem with the following patch for V12.1 Stable:
--- pxe.c.orig 2019-01-13 08:25:55.000000000 +0100
+++ pxe.c 2020-06-15 21:30:19.000000000 +0200
@@ -424,7 +424,7 @@
if (undi_open_p == NULL)
- undi_open_p->PktFilter = FLTR_DIRECTED | FLTR_BRDCST;
+ undi_open_p->PktFilter = FLTR_DIRECTED;
if (undi_open_p->Status != 0)
printf("undi open failed: %x\n", undi_open_p->Status);
For more info see