>>Checking Media Presence......
>>Media Present......
>>Start PXE over IPv4.
  PXE-E18: Server response timeout.

>>Checking Media Presence......
>>Media Present......
>>Start PXE over IPv6..
  Station IP address is 2401:DB00:11:8169:FACE:0:4F:0
  Server IP address is 2401:DB00:20:9F1F:FACE:B00C:0:F7
  NBP filename is snponly.efi
  NBP filesize is 125536 Bytes

>>Checking Media Presence......
>>Media Present......
 Downloading NBP file...

  Succeed to download NBP file.
iPXE initialising devices...ok



iPXE 1.0.0+ (56a8) -- Open Source Network Boot Firmware -- http://ipxe.org
Features: HTTP DNS TFTP EFI Menu
INFO: successfully tftp fetched FB ipxe rom.
INFO: setting dhcp user-class to 'FBipxe'.
EXECUTING: set user-class FBipxeUEFI
No previous filename
EXECUTING: autoboot
net0: f4:52:14:9b:dd:20 using <NULL> on EFI SNP (open)
  [Link:up, TX:0 TXE:0 RX:0 RXE:0]
Configuring (net0 f4:52:14:9b:dd:20).................. ok
net0: fe80::f652:14ff:fe9b:dd20/64
net0: 2401:db00:11:8169:face:0:4f:0/64 gw fe80::8af0:31ff:fea4:5cfc
Filename: http://[2401:db00:20:9f15:face:b00c:0:ee]/getipxe?mac=f4:52:14:9b:dd:20&uefi=true
http://[2401:db00:20:9f15:face:b00c:0:ee]/getipxe?mac=f4%3A52%3A14%3A9b%3Add%3A20&uefi=true... ok
INFO: Begin FB iPXE
INFO: hostname is sparefullweb14403.prn1.facebook.com
INFO: MAC address is f4:52:14:9b:dd:20
INFO: iPXE server is routablecm001.prn2.facebook.com
INFO: setting dhcp user-class to 'FBipxe'
INFO: http://ipxe.org/cfg/user-class
INFO: Booting iPXE client into kickstart [centos6-bt]
Configuring (net0 f4:52:14:9b:dd:20).................. ok
http://[2401:db00:11:8f0b:face:b00c:0:134]/opsfiles_bin/tftp/efi/ks-centos62-2.6.38_fbk37-initrd.img... ok
time: 0.8s
BOOTING: kernel http://[2401:db00:11:8f0b:face:b00c:0:134]/opsfiles_bin/tftp/efi/ks-centos62-2.6.38_fbk37-kernel ksdevice=eth0 sshd console=ttyS1,57600 ipv6.autoconf=1 loglevel=debug selinux=0 noipv4 cmdline initrd=\ks-centos62-2.6.38_fbk37-initrd.img dns=2401:db00:eef0:a53::,2401:db00:eef0:b53:: ipv6=2401:db00:11:8169:face:0:4f:0/64 ramdisk_size=2097152 kssendmac ks=http://[2401:db00:20:9f15:face:b00c:0:ee]/fbks.php?notorrent=True&kernel=3.10.75-82_fbk20_hotfix1&chefhost=1&prescript=&chef_server=&cluster=24&ip=&partition=default_ext4&baseurl=kickstart/centos62/os/x86_64&model_make=Quanta&gateway=&ks=fbks-centos6-bittorrent.cfg&postscript=append_mac&netmask=255.255.255.0&uefi=true&ipv6=2401:db00:11:8169:face:0:4f:0&model_name=WIMIT1_V2&nameserver=2401:db00:eef0:a53::,2401:db00:eef0:b53::&kexec=False&hostname=sparefullweb14403.prn1.facebook.com&model_id=910
http://[2401:db00:11:8f0b:face:b00c:0:134]/opsfiles_bin/tftp/efi/ks-centos62-2.6.38_fbk37-kernel... ok
Could not select: Exec format error (http://ipxe.org/2e008081)
time: 0.1s
Could not boot image: Exec format error (http://ipxe.org/2e008081)
Autoboot failed
EXECUTING: autoboot again
net0: f4:52:14:9b:dd:20 using <NULL> on EFI SNP (open)
  [Link:up, TX:5443 TXE:0 RX:33249 RXE:33]
  [RXE: 16 x "Operation not supported (http://ipxe.org/3c086083)"]
  [RXE: 13 x "The socket is not connected (http://ipxe.org/380a6093)"]
  [RXE: 4 x "The socket is not connected (http://ipxe.org/380f6093)"]
Configuring (net0 f4:52:14:9b:dd:20)................. ok
net0: fe80::f652:14ff:fe9b:dd20/64
net0: 2401:db00:11:8169:face:0:4f:0/64 gw fe80::8af0:31ff:fea4:5cfc
Filename: http://[2401:db00:20:9f15:face:b00c:0:ee]/getipxe?mac=f4:52:14:9b:dd:20&uefi=false
http://[2401:db00:20:9f15:face:b00c:0:ee]/getipxe?mac=f4%3A52%3A14%3A9b%3Add%3A20&uefi=false... ok
INFO: Begin FB iPXE
INFO: hostname is sparefullweb14403.prn1.facebook.com
INFO: MAC address is f4:52:14:9b:dd:20
INFO: iPXE server is routablecm001.prn2.facebook.com
INFO: setting dhcp user-class to 'FBipxe'
INFO: http://ipxe.org/cfg/user-class
INFO: Booting iPXE client into kickstart [centos6-bt]
Configuring (net0 f4:52:14:9b:dd:20)................. ok
http://[2401:db00:11:8f0b:face:b00c:0:134]/opsfiles_bin/tftp/efi/ks-centos62-2.6.38_fbk37-initrd.img... ok
time: 0.8s
BOOTING: kernel http://[2401:db00:11:8f0b:face:b00c:0:134]/opsfiles_bin/tftp/efi/ks-centos62-2.6.38_fbk37-kernel ksdevice=eth0 sshd console=ttyS1,57600 ipv6.autoconf=1 loglevel=debug selinux=0 noipv4 cmdline initrd=\ks-centos62-2.6.38_fbk37-initrd.img dns=2401:db00:eef0:a53::,2401:db00:eef0:b53:: ipv6=2401:db00:11:8169:face:0:4f:0/64 ramdisk_size=2097152 kssendmac ks=http://[2401:db00:20:9f15:face:b00c:0:ee]/fbks.php?notorrent=True&kernel=3.10.75-82_fbk20_hotfix1&chefhost=1&prescript=&chef_server=&cluster=24&ip=&partition=default_ext4&baseurl=kickstart/centos62/os/x86_64&model_make=Quanta&gateway=&ks=fbks-centos6-bittorrent.cfg&postscript=append_mac&netmask=255.255.255.0&uefi=false&ipv6=2401:db00:11:8169:face:0:4f:0&model_name=WIMIT1_V2&nameserver=2401:db00:eef0:a53::,2401:db00:eef0:b53::&kexec=False&hostname=sparefullweb14403.prn1.facebook.com&model_id=910
http://[2401:db00:11:8f0b:face:b00c:0:134]/opsfiles_bin/tftp/efi/ks-centos62-2.6.38_fbk37-kernel... ok
Could not select: Exec format error (http://ipxe.org/2e008081)
time: 0.1s
Could not boot image: Exec format error (http://ipxe.org/2e008081)
>>Media Present......