Strange problem chaining ipxe krn from vesamenu.c32

[khanand]

My issue is when chaining from the vesamenu.c32 menu the boot file download stalls unexpectedly usually on the last line "initrd boot64.wim" - it gets to x% then just stops.

Can anyone shed any insight?

If I break out to the iPXE prompt and chain Wimboot.ipxe directly everything works fine.

MENU

DEFAULT vesamenu.c32

PROMPT 0

MENU TITLE Windows Boot Menu
MENU INCLUDE pxelinux.cfg/graphics.conf

MENU SEPARATOR
MENU SEPARATOR

LABEL MainMenu
MENU LABEL ^Return to Main Menu
KERNEL vesamenu.c32
APPEND pxelinux.cfg/default

MENU SEPARATOR

LABEL LAB1
MENU DEFAULT
MENU LABEL MYLABEL
kernel ipxe.lkrn
APPEND dhcp && chain http://WDSPEXESERVER/Setup/English/Windows/1BE.x64/wimboot.ipxe


Wimboot.ipxe

#!ipxe
#set use-cached 1
#set arch amd64
kernel wimboot
initrd bootmgr bootmgr
initrd bcd BCD
initrd boot.sdi boot.sdi
initrd boot64.wim boot.wim
boot