squashfs cannot be downloaded when ipxe chainloading, dracut-initqueue fail find root

[vigo332]

Hi,

I am trying to chainload booting rhel server 7.4 from http to kickstart install the OS for my Lenovo thinkstation.

I have the ipxe chainloaded correctly, the initrd and kernel are downloaded from my http server.
However, the squashfs is not downloaded. I think ipxe used curl to download this.

The install failed at the dracut-initqueue where it spit out the error of /dev/root is not located.

The following script is chainloaded.

#!ipxe

echo Setting up the network interfaces
ifopen

echo Setting eth0 on MAC address ${eth0/mac}
set net0/ip 192.168.56.130
set net0/netmask 255.255.255.0
set net0/gateway 192.168.56.254

ifstat

echo Printing the routing table
route

echo Downloading image and kernel for chainloading from http://192.168.56.13/ftp/tree/isolinux

initrd http://192.168.56.13/ftp/tree/isolinux/initrd.img
kernel http://192.168.56.13/ftp/tree/isolinux/vmlinuz initrd=initrd.img inst.ks=http://192.168.56.13/ftp/ks_files/192.168.56.130.ks.cfg inst.repo=http://192.168.56.13/ftp/tree ro root=live:http://192.168.56.13/ftp/tree/LiveOS/squashfs.img rd.AUTO=1 rd_NO_LUKS LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 crashkernel=auto KEYBOARDTYPE=pc KEYTABLE=us rd.shell
boot

Note that I have my VirtualBox vm works without any problem using same script except for different ip and http server.

Any suggestions are greatly appreciated.