> It would be great if you could tell me which DHCP server is running
> on your network,
Unfortunately I cannot reach anybody from IT staff.
> or the make and model of your gateway device.
Not sure what you mean by gateway device. My machine's eth1 is
"00:19.0 Ethernet controller: Intel Corporation Ethernet Connection
I217-LM (rev 04)", driven by e1000e.
> Also, if you could capture the packets exchanged while dhclient runs on
> eth1 with tcpdump, that would be very helpful.
I identified two relevant frames, please see below.
> you said you tested running the dhclient command from ifupdown 0.8.1
> with only -D LLT removed, and then it worked? So you still used the
> -I flag?
Yes, -I doesn't hurt.
DHCP Request
============
540 8.939837 0.0.0.0 255.255.255.255 DHCP 342 DHCP Request -
Transaction ID 0x92ae1b78
Frame 540: 342 bytes on wire (2736 bits), 342 bytes captured (2736 bits)
Encapsulation type: Ethernet (1)
Arrival Time: Dec 4, 2015 08:53:09.443643000 CET
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1449215589.443643000 seconds
[Time delta from previous captured frame: 0.051552000 seconds]
[Time delta from previous displayed frame: 0.051552000 seconds]
[Time since reference or first frame: 8.939837000 seconds]
Frame Number: 540
Frame Length: 342 bytes (2736 bits)
Capture Length: 342 bytes (2736 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:ip:udp:bootp]
[Coloring Rule Name: UDP]
[Coloring Rule String: udp]
Ethernet II, Src: Dell_e1:34:e5 (34:17:eb:e1:34:e5), Dst: Broadcast
(ff:ff:ff:ff:ff:ff)
Destination: Broadcast (ff:ff:ff:ff:ff:ff)
Address: Broadcast (ff:ff:ff:ff:ff:ff)
.... ..1. .... .... .... .... = LG bit: Locally administered address
(this is NOT the factory default)
.... ...1 .... .... .... .... = IG bit: Group address
(multicast/broadcast)
Source: Dell_e1:34:e5 (34:17:eb:e1:34:e5)
Address: Dell_e1:34:e5 (34:17:eb:e1:34:e5)
.... ..0. .... .... .... .... = LG bit: Globally unique address
(factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Type: IPv4 (0x0800)
Internet Protocol Version 4, Src: 0.0.0.0, Dst: 255.255.255.255
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes
Differentiated Services Field: 0x10 (DSCP: Unknown, ECN: Not-ECT)
0001 00.. = Differentiated Services Codepoint: Unknown (4)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport
(0)
Total Length: 328
Identification: 0x0000 (0)
Flags: 0x00
0... .... = Reserved bit: Not set
.0.. .... = Don't fragment: Not set
..0. .... = More fragments: Not set
Fragment offset: 0
Time to live: 128
Protocol: UDP (17)
Header checksum: 0x3996 [validation disabled]
[Good: False]
[Bad: False]
Source: 0.0.0.0
Destination: 255.255.255.255
[Source GeoIP: Unknown]
[Destination GeoIP: s\��U]
[Destination GeoIP AS Number: s\��U]
User Datagram Protocol, Src Port: 68 (68), Dst Port: 67 (67)
Source Port: 68
Destination Port: 67
Length: 308
Checksum: 0x8d7e [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
[Stream index: 31]
Bootstrap Protocol (Request)
Message type: Boot Request (1)
Hardware type: Ethernet (0x01)
Hardware address length: 6
Hops: 0
Transaction ID: 0x92ae1b78
Seconds elapsed: 5
Bootp flags: 0x0000 (Unicast)
0... .... .... .... = Broadcast flag: Unicast
.000 0000 0000 0000 = Reserved flags: 0x0000
Client IP address: 0.0.0.0
Your (client) IP address: 0.0.0.0
Next server IP address: 0.0.0.0
Relay agent IP address: 0.0.0.0
Client MAC address: Dell_e1:34:e5 (34:17:eb:e1:34:e5)
Client hardware address padding: 00000000000000000000
Server host name not given
Boot file name not given
Magic cookie: DHCP
Option: (53) DHCP Message Type (Request)
Length: 1
DHCP: Request (3)
Option: (50) Requested IP Address
Length: 4
Requested IP Address: 172.17.198.200
Option: (55) Parameter Request List
Length: 7
Parameter Request List Item: (1) Subnet Mask
Parameter Request List Item: (28) Broadcast Address
Parameter Request List Item: (2) Time Offset
Parameter Request List Item: (3) Router
Parameter Request List Item: (15) Domain Name
Parameter Request List Item: (6) Domain Name Server
Parameter Request List Item: (12) Host Name
Option: (61) Client identifier
Length: 19
IAID: ebe134e5
DUID Type: link-layer address plus time (1)
Hardware type: Ethernet (1)
Time: 502460052
Link layer address: 34:17:eb:e1:34:e5
Option: (255) End
Option End: 255
Padding: 0000000000000000000000000000000000000000
----------------------------------------------------------------------------------------------------
DHCP Discover
=============
799 16.526848 0.0.0.0 255.255.255.255 DHCP 342 DHCP Discover -
Transaction ID 0x3975c365
Frame 799: 342 bytes on wire (2736 bits), 342 bytes captured (2736 bits)
Encapsulation type: Ethernet (1)
Arrival Time: Dec 4, 2015 08:53:17.030654000 CET
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1449215597.030654000 seconds
[Time delta from previous captured frame: 0.007543000 seconds]
[Time delta from previous displayed frame: 0.007543000 seconds]
[Time since reference or first frame: 16.526848000 seconds]
Frame Number: 799
Frame Length: 342 bytes (2736 bits)
Capture Length: 342 bytes (2736 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:ip:udp:bootp]
[Coloring Rule Name: UDP]
[Coloring Rule String: udp]
Ethernet II, Src: Dell_e1:34:e5 (34:17:eb:e1:34:e5), Dst: Broadcast
(ff:ff:ff:ff:ff:ff)
Destination: Broadcast (ff:ff:ff:ff:ff:ff)
Address: Broadcast (ff:ff:ff:ff:ff:ff)
.... ..1. .... .... .... .... = LG bit: Locally administered address
(this is NOT the factory default)
.... ...1 .... .... .... .... = IG bit: Group address
(multicast/broadcast)
Source: Dell_e1:34:e5 (34:17:eb:e1:34:e5)
Address: Dell_e1:34:e5 (34:17:eb:e1:34:e5)
.... ..0. .... .... .... .... = LG bit: Globally unique address
(factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Type: IPv4 (0x0800)
Internet Protocol Version 4, Src: 0.0.0.0, Dst: 255.255.255.255
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes
Differentiated Services Field: 0x10 (DSCP: Unknown, ECN: Not-ECT)
0001 00.. = Differentiated Services Codepoint: Unknown (4)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport
(0)
Total Length: 328
Identification: 0x0000 (0)
Flags: 0x00
0... .... = Reserved bit: Not set
.0.. .... = Don't fragment: Not set
..0. .... = More fragments: Not set
Fragment offset: 0
Time to live: 128
Protocol: UDP (17)
Header checksum: 0x3996 [validation disabled]
[Good: False]
[Bad: False]
Source: 0.0.0.0
Destination: 255.255.255.255
[Source GeoIP: Unknown]
[Destination GeoIP: s\��U]
[Destination GeoIP AS Number: s\��U]
User Datagram Protocol, Src Port: 68 (68), Dst Port: 67 (67)
Source Port: 68
Destination Port: 67
Length: 308
Checksum: 0x40cf [validation disabled]
[Good Checksum: False]
[Bad Checksum: False]
[Stream index: 31]
Bootstrap Protocol (Discover)
Message type: Boot Request (1)
Hardware type: Ethernet (0x01)
Hardware address length: 6
Hops: 0
Transaction ID: 0x3975c365
Seconds elapsed: 0
Bootp flags: 0x0000 (Unicast)
0... .... .... .... = Broadcast flag: Unicast
.000 0000 0000 0000 = Reserved flags: 0x0000
Client IP address: 0.0.0.0
Your (client) IP address: 0.0.0.0
Next server IP address: 0.0.0.0
Relay agent IP address: 0.0.0.0
Client MAC address: Dell_e1:34:e5 (34:17:eb:e1:34:e5)
Client hardware address padding: 00000000000000000000
Server host name not given
Boot file name not given
Magic cookie: DHCP
Option: (53) DHCP Message Type (Discover)
Length: 1
DHCP: Discover (1)
Option: (50) Requested IP Address
Length: 4
Requested IP Address: 172.17.198.200
Option: (55) Parameter Request List
Length: 7
Parameter Request List Item: (1) Subnet Mask
Parameter Request List Item: (28) Broadcast Address
Parameter Request List Item: (2) Time Offset
Parameter Request List Item: (3) Router
Parameter Request List Item: (15) Domain Name
Parameter Request List Item: (6) Domain Name Server
Parameter Request List Item: (12) Host Name
Option: (61) Client identifier
Length: 19
IAID: ebe134e5
DUID Type: link-layer address plus time (1)
Hardware type: Ethernet (1)
Time: 502460052
Link layer address: 34:17:eb:e1:34:e5
Option: (255) End
Option End: 255
Padding: 0000000000000000000000000000000000000000
