Recently iPXE don't chainboot.

[Yusuke]

About one years ago, I sucessed iPXE chainbooting.
I use iPXE 1.0.0+ (acc27) build.

But I tried chainboot by recently iPXE build.
I failed iPXE chainboot.
I use iPXE 1.0.0+(55e4).

Environment is same.
same server, same client.

Why?

Code:

Intel UNDI. PXE-2.1 (build 002)
Copyright (C) 1997-2000 Intel Corporation

For RealTek RTL8111B/8111C Gigabyte Ethernet Controller v2.14(000225)

CLIENT MAC ADDR: 00 25 11 CB 41 1B GUID 00020003-0004-0005-0006-00700080009
CLIENT IP: 172.20.10.83 MASK 255.255.0.0
DHCP IP: 172.20.0.70 PROXY IP:172.20.0.225
GATEWAY IP: 172.20.0.254

Auto-Select:
     splash

BOOT SERVER IP : 172.20.0.225

PXE-EB: !PXE at 9C3E:0070,entry point at 9C3E:0109
             UNDI code segment 9C3E:1A7A, data segment 923D:A010 (584-632kB)
             UNID device is PCI 02:00.0, type DIX+802.3
             584kB free base memory after PXE unload
iPXE initialising devices...ok

iPXE 1.0.0+ (55e4) -- Open Source Network Boot Firmware -- http://ipxe.org
Features: DNS HTTP iSCSI TFTP AoE ELF MBOOT PXE bzImage Menu PXEXT

net0: 00:25:11:cb:41:1b using undionly on UNDI-PCI02:00,0 (open)
  [Link:up, TX:0 TXER:0 RX:0 RXE:0]
Configuring (net0 00:25:11:cb:41:1b)....ok
net0: 172.20.10.83/255.255.0.0 gw 172.20.0.254
Nothing to boot: No such file or directory
No more network devices

Press Ctrl+B for the iPXE command line...

I found out old build chainboot fine.
I searched chainbooting recently iPXE build.

It is chainbooting underline.
https://git.ipxe.org/ipxe.git/commit/ba3...59c339bfa6

Code:

[settings] Re-add "uristring" setting type
author    Michael Brown <mcb30@ipxe.org>    
Tue, 25 Aug 2015 20:33:40 +0900 (12:33 +0100)
committer    Michael Brown <mcb30@ipxe.org>    
Tue, 25 Aug 2015 21:31:46 +0900 (13:31 +0100)
commit    ba3695353add020b686547699ba5e259c339bfa6
tree    d400084f87152adbbbc7dbca3140c1c2789c03b0    tree | snapshot (tar.gz tar.bz2 zip)
parent    4e03af8ec2d497e725566a91fd5c19dd604c18a6

After commit source, It cannot chainboot.

Enviroment
Server
- Debian Wheezy (Linux pxeserver 3.2.0-4-amd64 #1 SMP Debian 3.2.78-1 x86_64 GNU/Linux)
- ECS 945GCT-M
- Intel® Pentium® Dual CPU E2160 @ 1.80GHz
- Dnsmasq 2.62-3+deb7u3
- iPXE (undionly.kpxe)
Client
- Desktop PC
- ECS G43T-M5
- Realtec PCIe GBE Family Controller
- Intel UNDI,PXE-2.0 (bulid 082)
- Realtek RTL8139(A/B/C)/RTL8130 PCI Fast Ethernet Controller v2.11

dnsmasq conf

Code:

root@pxeserver:~# cat /etc/dnsmasq.conf | grep -v -e ^# -e ^$
dhcp-range=172.20.0.0,proxy
dhcp-boot=tag:!ipxe,undionly.kpxe,172.20.0.225
dhcp-match=set:ipxe,175 # gPXE/iPXE sends a 175 option.
dhcp-boot=tag:!ipxe,undionly.kpxe
dhcp-boot=tag:ipxe,http://172.20.0.225/a.ipxe
pxe-service=tag:!ipxe,x86PC,"splash",undionly.kpxe
enable-tftp
tftp-root=/var/ftpd
log-queries
conf-dir=/etc/dnsmasq.d

Is dnsmasq.conf settings wrong?
Old build can chainbooting.
I don't think it wrong.

I get two packet caputure chainbooting and not chainbooting by tcpdump.
I share it for you by cloudshark.

Chainboot sucess!
iPXE 1.0.0+(ba36) Tue, 25 Aug 2015

Chainboot failed!
iPXE 1.0.0+(55e4)