[gPXE] Intel Undi PXE 2.1 Client Ignores DHCP Offer Messages with gPXE Filename from ISC DHCP Server

Reim, Thomas Thomas.Reim at cassidian.com
Thu Oct 20 09:47:34 EDT 2011


Dear all,

I got stuck on enabling an Intel Undi based PXE 2.1 client to retrieve
the gPXE boot file from my DHCP/TFTP Boot server. Here's an extract from
my dhcpd.conf:

[CODE]
# PXE Options (ISC DHCP Server Version 3.x)
option space PXE;
option PXE.discovery-control code 6 = unsigned integer 8;

# PXE client classes
class "PXE-clients" {
	match if substring (option vendor-class-identifier, 0, 9) =
"PXEClient";
	option dhcp-parameter-request-list 60,66,43;
	# Option 60
	option vendor-class-identifier "PXEClient";
	# Option 66
	option tftp-server-name "192.168.0.65";
	# Option 67
#	option bootfile-name "/pxelinux.0";
	# Option 43 with PXE_DISCOVERY_CONTROL set to use boot file name

	# of the initial DHCPOFFER packet
	vendor-option-space PXE;
	option PXE.discovery-control 11;
	next-server 192.168.0.65;
	server-name "192.168.0.65";
	filename "/undionly.kpxe";
}

subnet 192.168.0.0 netmask 255.255.255.0 {
	ddns-updates on;
	ddns-domainname "mydomain";
	option routers 192.168.0.65;
	option netbios-name-servers 192.168.0.65;
	option netbios-dd-server 192.168.0.65;
	option netbios-node-type 8;
	option subnet-mask 255.255.255.0;
	option domain-name-servers 192.168.0.65;

	# PXE clients
	pool {
		range 192.168.0.101 192.168.0.110;
		default-lease-time 21600;
		max-lease-time 43200;
		allow members of "PXE-clients";
	}
}
[/CODE]

If you check the following wireshark trace you will see, that the PXE
2.1 client issues four DHCP DISCOVER messages. All of them are acked by
the DHCP server with a DHCP OFFER message. The 2nd DISCOVER message is
sent 2 s after the first one, where I would have expected a DHCP REQUEST
message. The 3rd message is sent 4 s after the 2nd DISCOVER and the last
DISCOVER is sent 8 s after the previous request. According to the PXE
specification this could be caused by timeouts due to missing DHCP
option #60 with "PXEClient" in the DHCP OFFER messages from the server.
But checking wireshark dumps, option #60 is there.

PXE boot works fine on an older client with Intel Undi PXE 2.0
implemented (see second wireshark trace below)

Any hints how to solve this?

P.S.: Here are the wireshark traces:

1. Failed PXE boot:
[CODE]
No.     Time        Source                Destination           Protocol
Info
      1 0.000000    0.0.0.0               255.255.255.255       DHCP
DHCP Discover - Transaction ID 0xd19fe343

Frame 1 (590 bytes on wire, 590 bytes captured)
Ethernet II, Src: bootserver.mydomain (00:1f:d0:9f:e3:43), Dst:
Broadcast (ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 0.0.0.0 (0.0.0.0), Dst: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
    Message type: Boot Request (1)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0xd19fe343
    Seconds elapsed: 4
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 0.0.0.0 (0.0.0.0)
    Next server IP address: 0.0.0.0 (0.0.0.0)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: bootserver.mydomain (00:1f:d0:9f:e3:43)
    Client hardware address padding: 00000000000000000000
    Server host name not given
    Boot file name not given
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP Discover
    Option: (t=55,l=24) Parameter Request List
        Option: (55) Parameter Request List
        Length: 24
        Value: 01020305060B0C0D0F1011122B363C438081828384858687
        1 = Subnet Mask
        2 = Time Offset
        3 = Router
        5 = Name Server
        6 = Domain Name Server
        11 = Resource Location Server
        12 = Host Name
        13 = Boot File Size
        15 = Domain Name
        16 = Swap Server
        17 = Root Path
        18 = Extensions Path
        43 = Vendor-Specific Information
        54 = DHCP Server Identifier
        60 = Vendor class identifier
        67 = Bootfile name
        128 = DOCSIS full security server IP [TODO]
        129 = PXE - undefined (vendor specific)
        130 = PXE - undefined (vendor specific)
        131 = PXE - undefined (vendor specific)
        132 = PXE - undefined (vendor specific)
        133 = PXE - undefined (vendor specific)
        134 = PXE - undefined (vendor specific)
        135 = PXE - undefined (vendor specific)
    Option: (t=57,l=2) Maximum DHCP Message Size = 1260
    Option: (t=97,l=17) UUID/GUID-based Client Identifier
        Option: (97) UUID/GUID-based Client Identifier
        Length: 17
        Value: 00303031464430394645333433FFFFFFFF
        Client Identifier (UUID): 46313030-3044-4639-4533-3433ffffffff
    Option: (t=93,l=2) Client System Architecture = IA x86 PC
    Option: (t=94,l=3) Client Network Device Interface
        Option: (94) Client Network Device Interface
        Length: 3
        Value: 010201
        Client Network ID Major Version: 2
        Client Network ID Minor Version: 1
    Option: (t=60,l=32) Vendor class identifier =
"PXEClient:Arch:00000:UNDI:002001"
    End Option
    Padding
No.     Time        Source                Destination           Protocol
Info
      2 0.661461    192.168.0.65          255.255.255.255       DHCP
DHCP Offer    - Transaction ID 0xd19fe343

Frame 2 (346 bytes on wire, 346 bytes captured)
Ethernet II, Src: AsustekC_1a:4e:67 (00:1b:fc:1a:4e:67), Dst: Broadcast
(ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 192.168.0.65 (192.168.0.65), Dst:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
    Message type: Boot Reply (2)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0xd19fe343
    Seconds elapsed: 4
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 192.168.0.101 (192.168.0.101)
    Next server IP address: 192.168.0.65 (192.168.0.65)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: bootserver.mydomain (00:1f:d0:9f:e3:43)
    Client hardware address padding: 00000000000000000000
    Server host name: 192.168.0.65
    Boot file name: /undionly.kpxe
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP Offer
    Option: (t=54,l=4) DHCP Server Identifier = 192.168.0.65
    Option: (t=51,l=4) IP Address Lease Time = 6 hours
    Option: (t=60,l=9) Vendor class identifier = "PXEClient"
    Option: (t=66,l=12) TFTP Server Name = "192.168.0.65"
    Option: (t=43,l=3) Vendor-Specific Information (PXEClient)
        Option: (43) Vendor-Specific Information
        Length: 3
        Value: 06010B
        Suboption 6: PXE discovery control = 11
    Option: (t=1,l=4) Subnet Mask = 255.255.255.0
    End Option
No.     Time        Source                Destination           Protocol
Info
      3 2.112295    0.0.0.0               255.255.255.255       DHCP
DHCP Discover - Transaction ID 0xd29fe343

Frame 3 (590 bytes on wire, 590 bytes captured)
Ethernet II, Src: bootserver.mydomain (00:1f:d0:9f:e3:43), Dst:
Broadcast (ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 0.0.0.0 (0.0.0.0), Dst: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
    Message type: Boot Request (1)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0xd29fe343
    Seconds elapsed: 6
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 0.0.0.0 (0.0.0.0)
    Next server IP address: 0.0.0.0 (0.0.0.0)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: bootserver.mydomain (00:1f:d0:9f:e3:43)
    Client hardware address padding: 00000000000000000000
    Server host name not given
    Boot file name not given
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP Discover
    Option: (t=55,l=24) Parameter Request List
        Option: (55) Parameter Request List
        Length: 24
        Value: 01020305060B0C0D0F1011122B363C438081828384858687
        1 = Subnet Mask
        2 = Time Offset
        3 = Router
        5 = Name Server
        6 = Domain Name Server
        11 = Resource Location Server
        12 = Host Name
        13 = Boot File Size
        15 = Domain Name
        16 = Swap Server
        17 = Root Path
        18 = Extensions Path
        43 = Vendor-Specific Information
        54 = DHCP Server Identifier
        60 = Vendor class identifier
        67 = Bootfile name
        128 = DOCSIS full security server IP [TODO]
        129 = PXE - undefined (vendor specific)
        130 = PXE - undefined (vendor specific)
        131 = PXE - undefined (vendor specific)
        132 = PXE - undefined (vendor specific)
        133 = PXE - undefined (vendor specific)
        134 = PXE - undefined (vendor specific)
        135 = PXE - undefined (vendor specific)
    Option: (t=57,l=2) Maximum DHCP Message Size = 1260
        Option: (57) Maximum DHCP Message Size
        Length: 2
        Value: 04EC
    Option: (t=97,l=17) UUID/GUID-based Client Identifier
    Option: (t=93,l=2) Client System Architecture = IA x86 PC
    Option: (t=94,l=3) Client Network Device Interface
    Option: (t=60,l=32) Vendor class identifier =
"PXEClient:Arch:00000:UNDI:002001"
    End Option
    Padding
No.     Time        Source                Destination           Protocol
Info
      4 2.112799    192.168.0.65          255.255.255.255       DHCP
DHCP Offer    - Transaction ID 0xd29fe343

Frame 4 (346 bytes on wire, 346 bytes captured)
Ethernet II, Src: AsustekC_1a:4e:67 (00:1b:fc:1a:4e:67), Dst: Broadcast
(ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 192.168.0.65 (192.168.0.65), Dst:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
    Message type: Boot Reply (2)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0xd29fe343
    Seconds elapsed: 6
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 192.168.0.101 (192.168.0.101)
    Next server IP address: 192.168.0.65 (192.168.0.65)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: bootserver.mydomain (00:1f:d0:9f:e3:43)
    Client hardware address padding: 00000000000000000000
    Server host name: 192.168.0.65
    Boot file name: /undionly.kpxe
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP Offer
    Option: (t=54,l=4) DHCP Server Identifier = 192.168.0.65
    Option: (t=51,l=4) IP Address Lease Time = 6 hours
    Option: (t=60,l=9) Vendor class identifier = "PXEClient"
    Option: (t=66,l=12) TFTP Server Name = "192.168.0.65"
    Option: (t=43,l=3) Vendor-Specific Information (PXEClient)
        Option: (43) Vendor-Specific Information
        Length: 3
        Value: 06010B
        Suboption 6: PXE discovery control = 11
    Option: (t=1,l=4) Subnet Mask = 255.255.255.0
    End Option
No.     Time        Source                Destination           Protocol
Info
      5 6.231478    0.0.0.0               255.255.255.255       DHCP
DHCP Discover - Transaction ID 0xd39fe343

Frame 5 (590 bytes on wire, 590 bytes captured)
Ethernet II, Src: bootserver.mydomain (00:1f:d0:9f:e3:43), Dst:
Broadcast (ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 0.0.0.0 (0.0.0.0), Dst: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
    Message type: Boot Request (1)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0xd39fe343
    Seconds elapsed: 10
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 0.0.0.0 (0.0.0.0)
    Next server IP address: 0.0.0.0 (0.0.0.0)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: bootserver.mydomain (00:1f:d0:9f:e3:43)
    Client hardware address padding: 00000000000000000000
    Server host name not given
    Boot file name not given
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP Discover
    Option: (t=55,l=24) Parameter Request List
        Option: (55) Parameter Request List
        Length: 24
        Value: 01020305060B0C0D0F1011122B363C438081828384858687
        1 = Subnet Mask
        2 = Time Offset
        3 = Router
        5 = Name Server
        6 = Domain Name Server
        11 = Resource Location Server
        12 = Host Name
        13 = Boot File Size
        15 = Domain Name
        16 = Swap Server
        17 = Root Path
        18 = Extensions Path
        43 = Vendor-Specific Information
        54 = DHCP Server Identifier
        60 = Vendor class identifier
        67 = Bootfile name
        128 = DOCSIS full security server IP [TODO]
        129 = PXE - undefined (vendor specific)
        130 = PXE - undefined (vendor specific)
        131 = PXE - undefined (vendor specific)
        132 = PXE - undefined (vendor specific)
        133 = PXE - undefined (vendor specific)
        134 = PXE - undefined (vendor specific)
        135 = PXE - undefined (vendor specific)
    Option: (t=57,l=2) Maximum DHCP Message Size = 1260
    Option: (t=97,l=17) UUID/GUID-based Client Identifier
    Option: (t=93,l=2) Client System Architecture = IA x86 PC
    Option: (t=94,l=3) Client Network Device Interface
    Option: (t=60,l=32) Vendor class identifier =
"PXEClient:Arch:00000:UNDI:002001"
    End Option
    Padding
No.     Time        Source                Destination           Protocol
Info
      6 6.231896    192.168.0.65          255.255.255.255       DHCP
DHCP Offer    - Transaction ID 0xd39fe343

Frame 6 (346 bytes on wire, 346 bytes captured)
Ethernet II, Src: AsustekC_1a:4e:67 (00:1b:fc:1a:4e:67), Dst: Broadcast
(ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 192.168.0.65 (192.168.0.65), Dst:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
    Message type: Boot Reply (2)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0xd39fe343
    Seconds elapsed: 10
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 192.168.0.101 (192.168.0.101)
    Next server IP address: 192.168.0.65 (192.168.0.65)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: bootserver.mydomain (00:1f:d0:9f:e3:43)
    Client hardware address padding: 00000000000000000000
    Server host name: 192.168.0.65
    Boot file name: /undionly.kpxe
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP Offer
    Option: (t=54,l=4) DHCP Server Identifier = 192.168.0.65
    Option: (t=51,l=4) IP Address Lease Time = 6 hours
    Option: (t=60,l=9) Vendor class identifier = "PXEClient"
    Option: (t=66,l=12) TFTP Server Name = "192.168.0.65"
    Option: (t=43,l=3) Vendor-Specific Information (PXEClient)
        Option: (43) Vendor-Specific Information
        Length: 3
        Value: 06010B
        Suboption 6: PXE discovery control = 11
    Option: (t=1,l=4) Subnet Mask = 255.255.255.0
    End Option
No.     Time        Source                Destination           Protocol
Info
      7 14.359837   0.0.0.0               255.255.255.255       DHCP
DHCP Discover - Transaction ID 0xd49fe343

Frame 7 (590 bytes on wire, 590 bytes captured)
Ethernet II, Src: bootserver.mydomain (00:1f:d0:9f:e3:43), Dst:
Broadcast (ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 0.0.0.0 (0.0.0.0), Dst: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
    Message type: Boot Request (1)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0xd49fe343
    Seconds elapsed: 18
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 0.0.0.0 (0.0.0.0)
    Next server IP address: 0.0.0.0 (0.0.0.0)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: bootserver.mydomain (00:1f:d0:9f:e3:43)
    Client hardware address padding: 00000000000000000000
    Server host name not given
    Boot file name not given
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP Discover
    Option: (t=55,l=24) Parameter Request List
        Option: (55) Parameter Request List
        Length: 24
        Value: 01020305060B0C0D0F1011122B363C438081828384858687
        1 = Subnet Mask
        2 = Time Offset
        3 = Router
        5 = Name Server
        6 = Domain Name Server
        11 = Resource Location Server
        12 = Host Name
        13 = Boot File Size
        15 = Domain Name
        16 = Swap Server
        17 = Root Path
        18 = Extensions Path
        43 = Vendor-Specific Information
        54 = DHCP Server Identifier
        60 = Vendor class identifier
        67 = Bootfile name
        128 = DOCSIS full security server IP [TODO]
        129 = PXE - undefined (vendor specific)
        130 = PXE - undefined (vendor specific)
        131 = PXE - undefined (vendor specific)
        132 = PXE - undefined (vendor specific)
        133 = PXE - undefined (vendor specific)
        134 = PXE - undefined (vendor specific)
        135 = PXE - undefined (vendor specific)
    Option: (t=57,l=2) Maximum DHCP Message Size = 1260
    Option: (t=97,l=17) UUID/GUID-based Client Identifier
    Option: (t=93,l=2) Client System Architecture = IA x86 PC
    Option: (t=94,l=3) Client Network Device Interface
    Option: (t=60,l=32) Vendor class identifier =
"PXEClient:Arch:00000:UNDI:002001"
    End Option
    Padding
No.     Time        Source                Destination           Protocol
Info
      8 14.360244   192.168.0.65          255.255.255.255       DHCP
DHCP Offer    - Transaction ID 0xd49fe343

Frame 8 (346 bytes on wire, 346 bytes captured)
Ethernet II, Src: AsustekC_1a:4e:67 (00:1b:fc:1a:4e:67), Dst: Broadcast
(ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 192.168.0.65 (192.168.0.65), Dst:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
    Message type: Boot Reply (2)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0xd49fe343
    Seconds elapsed: 18
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 192.168.0.101 (192.168.0.101)
    Next server IP address: 192.168.0.65 (192.168.0.65)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: bootserver.mydomain (00:1f:d0:9f:e3:43)
    Client hardware address padding: 00000000000000000000
    Server host name: 192.168.0.65
    Boot file name: /undionly.kpxe
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP Offer
    Option: (t=54,l=4) DHCP Server Identifier = 192.168.0.65
    Option: (t=51,l=4) IP Address Lease Time = 6 hours
    Option: (t=60,l=9) Vendor class identifier = "PXEClient"
    Option: (t=66,l=12) TFTP Server Name = "192.168.0.65"
    Option: (t=43,l=3) Vendor-Specific Information (PXEClient)
        Option: (43) Vendor-Specific Information
        Length: 3
        Value: 06010B
        Suboption 6: PXE discovery control = 11
    Option: (t=1,l=4) Subnet Mask = 255.255.255.0
    End Option
[/CODE]


2. Successful PXE boot:
[CODE]
No.     Time        Source                Destination           Protocol
Info
      1 0.000000    0.0.0.0               255.255.255.255       DHCP
DHCP Discover - Transaction ID 0x60aa785

Frame 1 (590 bytes on wire, 590 bytes captured)
Ethernet II, Src: FujitsuS_0a:a7:85 (00:30:05:0a:a7:85), Dst: Broadcast
(ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 0.0.0.0 (0.0.0.0), Dst: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
    Message type: Boot Request (1)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0x060aa785
    Seconds elapsed: 4
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 0.0.0.0 (0.0.0.0)
    Next server IP address: 0.0.0.0 (0.0.0.0)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: FujitsuS_0a:a7:85 (00:30:05:0a:a7:85)
    Client hardware address padding: 00000000000000000000
    Server host name not given
    Boot file name not given
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP Discover
        Option: (53) DHCP Message Type
        Length: 1
        Value: 01
    Option: (t=55,l=24) Parameter Request List
        Option: (55) Parameter Request List
        Length: 24
        Value: 01020305060B0C0D0F1011122B363C438081828384858687
        1 = Subnet Mask
        2 = Time Offset
        3 = Router
        5 = Name Server
        6 = Domain Name Server
        11 = Resource Location Server
        12 = Host Name
        13 = Boot File Size
        15 = Domain Name
        16 = Swap Server
        17 = Root Path
        18 = Extensions Path
        43 = Vendor-Specific Information
        54 = DHCP Server Identifier
        60 = Vendor class identifier
        67 = Bootfile name
        128 = DOCSIS full security server IP [TODO]
        129 = PXE - undefined (vendor specific)
        130 = PXE - undefined (vendor specific)
        131 = PXE - undefined (vendor specific)
        132 = PXE - undefined (vendor specific)
        133 = PXE - undefined (vendor specific)
        134 = PXE - undefined (vendor specific)
        135 = PXE - undefined (vendor specific)
    Option: (t=57,l=2) Maximum DHCP Message Size = 1260
    Option: (t=97,l=17) UUID/GUID-based Client Identifier
        Option: (97) UUID/GUID-based Client Identifier
        Length: 17
        Value: 00594253583033353736390030050AA785
        Client Identifier (UUID): 58534259-3330-3735-3639-0030050aa785
    Option: (t=93,l=2) Client System Architecture = IA x86 PC
    Option: (t=94,l=3) Client Network Device Interface
        Option: (94) Client Network Device Interface
        Length: 3
        Value: 010201
        Client Network ID Major Version: 2
        Client Network ID Minor Version: 1
    Option: (t=60,l=32) Vendor class identifier =
"PXEClient:Arch:00000:UNDI:002001"
    End Option
    Padding
No.     Time        Source                Destination           Protocol
Info
      2 0.212827    192.168.0.65          255.255.255.255       DHCP
DHCP Offer    - Transaction ID 0x60aa785

Frame 2 (342 bytes on wire, 342 bytes captured)
Ethernet II, Src: AsustekC_1a:4e:67 (00:1b:fc:1a:4e:67), Dst: Broadcast
(ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 192.168.0.65 (192.168.0.65), Dst:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
    Message type: Boot Reply (2)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0x060aa785
    Seconds elapsed: 4
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 192.168.0.102 (192.168.0.102)
    Next server IP address: 192.168.0.65 (192.168.0.65)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: FujitsuS_0a:a7:85 (00:30:05:0a:a7:85)
    Client hardware address padding: 00000000000000000000
    Server host name: 192.168.0.65
    Boot file name: /undionly.kpxe
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP Offer
    Option: (t=54,l=4) DHCP Server Identifier = 192.168.0.65
    Option: (t=51,l=4) IP Address Lease Time = 6 hours
    Option: (t=60,l=9) Vendor class identifier = "PXEClient"
    Option: (t=66,l=12) TFTP Server Name = "192.168.0.65"
    Option: (t=43,l=3) Vendor-Specific Information (PXEClient)
        Option: (43) Vendor-Specific Information
        Length: 3
        Value: 06010B
        Suboption 6: PXE discovery control = 11
    Option: (t=1,l=4) Subnet Mask = 255.255.255.0
    End Option
    Padding
No.     Time        Source                Destination           Protocol
Info
      3 2.087215    0.0.0.0               255.255.255.255       DHCP
DHCP Request  - Transaction ID 0x60aa785

Frame 3 (590 bytes on wire, 590 bytes captured)
Ethernet II, Src: FujitsuS_0a:a7:85 (00:30:05:0a:a7:85), Dst: Broadcast
(ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 0.0.0.0 (0.0.0.0), Dst: 255.255.255.255
(255.255.255.255)
User Datagram Protocol, Src Port: bootpc (68), Dst Port: bootps (67)
Bootstrap Protocol
    Message type: Boot Request (1)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0x060aa785
    Seconds elapsed: 4
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 0.0.0.0 (0.0.0.0)
    Next server IP address: 0.0.0.0 (0.0.0.0)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: FujitsuS_0a:a7:85 (00:30:05:0a:a7:85)
    Client hardware address padding: 00000000000000000000
    Server host name not given
    Boot file name not given
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP Request
    Option: (t=50,l=4) Requested IP Address = 192.168.0.102
    Option: (t=55,l=24) Parameter Request List
        Option: (55) Parameter Request List
        Length: 24
        Value: 01020305060B0C0D0F1011122B363C438081828384858687
        1 = Subnet Mask
        2 = Time Offset
        3 = Router
        5 = Name Server
        6 = Domain Name Server
        11 = Resource Location Server
        12 = Host Name
        13 = Boot File Size
        15 = Domain Name
        16 = Swap Server
        17 = Root Path
        18 = Extensions Path
        43 = Vendor-Specific Information
        54 = DHCP Server Identifier
        60 = Vendor class identifier
        67 = Bootfile name
        128 = DOCSIS full security server IP [TODO]
        129 = PXE - undefined (vendor specific)
        130 = PXE - undefined (vendor specific)
        131 = PXE - undefined (vendor specific)
        132 = PXE - undefined (vendor specific)
        133 = PXE - undefined (vendor specific)
        134 = PXE - undefined (vendor specific)
        135 = PXE - undefined (vendor specific)
    Option: (t=57,l=2) Maximum DHCP Message Size = 1260
    Option: (t=54,l=4) DHCP Server Identifier = 192.168.0.65
    Option: (t=97,l=17) UUID/GUID-based Client Identifier
    Option: (t=93,l=2) Client System Architecture = IA x86 PC
    Option: (t=94,l=3) Client Network Device Interface
    Option: (t=60,l=32) Vendor class identifier =
"PXEClient:Arch:00000:UNDI:002001"
    End Option
    Padding
No.     Time        Source                Destination           Protocol
Info
      4 2.096375    192.168.0.65          255.255.255.255       DHCP
DHCP ACK      - Transaction ID 0x60aa785

Frame 4 (342 bytes on wire, 342 bytes captured)
Ethernet II, Src: AsustekC_1a:4e:67 (00:1b:fc:1a:4e:67), Dst: Broadcast
(ff:ff:ff:ff:ff:ff)
Internet Protocol, Src: 192.168.0.65 (192.168.0.65), Dst:
255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: bootps (67), Dst Port: bootpc (68)
Bootstrap Protocol
    Message type: Boot Reply (2)
    Hardware type: Ethernet
    Hardware address length: 6
    Hops: 0
    Transaction ID: 0x060aa785
    Seconds elapsed: 4
    Bootp flags: 0x8000 (Broadcast)
        1... .... .... .... = Broadcast flag: Broadcast
        .000 0000 0000 0000 = Reserved flags: 0x0000
    Client IP address: 0.0.0.0 (0.0.0.0)
    Your (client) IP address: 192.168.0.102 (192.168.0.102)
    Next server IP address: 192.168.0.65 (192.168.0.65)
    Relay agent IP address: 0.0.0.0 (0.0.0.0)
    Client MAC address: FujitsuS_0a:a7:85 (00:30:05:0a:a7:85)
    Client hardware address padding: 00000000000000000000
    Server host name: 192.168.0.65
    Boot file name: /undionly.kpxe
    Magic cookie: (OK)
    Option: (t=53,l=1) DHCP Message Type = DHCP ACK
    Option: (t=54,l=4) DHCP Server Identifier = 192.168.0.65
    Option: (t=51,l=4) IP Address Lease Time = 6 hours
    Option: (t=60,l=9) Vendor class identifier = "PXEClient"
    Option: (t=66,l=12) TFTP Server Name = "192.168.0.65"
    Option: (t=43,l=3) Vendor-Specific Information (PXEClient)
        Option: (43) Vendor-Specific Information
        Length: 3
        Value: 06010B
        Suboption 6: PXE discovery control = 11
    Option: (t=1,l=4) Subnet Mask = 255.255.255.0
    End Option
    Padding
No.     Time        Source                Destination           Protocol
Info
      5 2.097483    192.168.0.102         192.168.0.65          TFTP
Read Request, File: /undionly.kpxe\000, Transfer type: octet\000,
0=0\000

Frame 5 (70 bytes on wire, 70 bytes captured)
Ethernet II, Src: FujitsuS_0a:a7:85 (00:30:05:0a:a7:85), Dst:
AsustekC_1a:4e:67 (00:1b:fc:1a:4e:67)
Internet Protocol, Src: 192.168.0.102 (192.168.0.102), Dst: 192.168.0.65
(192.168.0.65)
User Datagram Protocol, Src Port: ah-esp-encap (2070), Dst Port: tftp
(69)
Trivial File Transfer Protocol
    [Source File: /undionly.kpxe]
    Opcode: Read Request (1)
    Source File: /undionly.kpxe
    Type: octet
    Option: tsize\000 = 0\000
        Option name: tsize
        Option value: 0
No.     Time        Source                Destination           Protocol
Info
      6 2.099304    192.168.0.65          192.168.0.102         TFTP
Option Acknowledgement, 26742=26742\000

Frame 6 (56 bytes on wire, 56 bytes captured)
Ethernet II, Src: AsustekC_1a:4e:67 (00:1b:fc:1a:4e:67), Dst:
FujitsuS_0a:a7:85 (00:30:05:0a:a7:85)
Internet Protocol, Src: 192.168.0.65 (192.168.0.65), Dst: 192.168.0.102
(192.168.0.102)
User Datagram Protocol, Src Port: 56082 (56082), Dst Port: ah-esp-encap
(2070)
Trivial File Transfer Protocol
    [Source File: /undionly.kpxe]
    Opcode: Option Acknowledgement (6)
    Option: tsize\000 = 26742\000
        Option name: tsize
        Option value: 26742
[/CODE]





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