On 11/4/06, Geert Stappers <stappers@stappers.nl> wrote:
Op 04-11-2006 om 12:29 schreef Jens Peter Secher: > Geert Stappers > > > [ d-i DHCP request fails, installed system DHCP request works ] > > > > I think you are saying > > "I don't know that my network has two DHCP servers" > > I don't think so, see above. Do you have any suggestions to what I > should do to debug further? Install the package dhcpdump on computer 192.168.1.1, capture both sessions (d-i & installed) and search for differences in the DHCP replies, especial on the router info
I ran
nohup sudo sh -c "bin/dchptrace &"
on 192.168.1.1 where bin/dhcptrace is
#!/bin/sh
tcpdump -lenx -s 1500 port bootps or port bootpc | dhcpdump > dhcp.trace
The output (MAC-obfuscated by me) after retrying debian_installer is
TIME: 19:07:53.484470
IP: > (my:t4:2m:ac:ad:dr) > (ff:ff:ff:ff:ff:ff)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: c2693933
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: my:t4:2m:ac:ad:dr:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 1 (DHCPDISCOVER)
OPTION: 60 ( 3) Vendor class identifier d-i
OPTION: 55 ( 7) Parameter Request List 1 (Subnet mask)
28 (Broadcast address)
2 (Time offset)
3 (Routers)
15 (Domainname)
6 (DNS server)
12 (Host name)
---------------------------------------------------------------------------
TIME: 19:07:53.496186
IP: > (se:rv:er:ad:dr:es) > (my:t4:2m:ac:ad:dr)
OP: 2 (BOOTPREPLY)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: c2693933
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 192.168.1.8
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: my:t4:2m:ac:ad:dr:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 2 (DHCPOFFER)
OPTION: 54 ( 4) Server identifier 192.168.1.1
OPTION: 51 ( 4) IP address leasetime 864000 (1w3d)
OPTION: 3 ( 4) Routers 192.168.1.1
OPTION: 5 ( 4) Name server 192.168.1.1
OPTION: 6 ( 4) DNS server 192.168.1.1
OPTION: 15 ( 14) Domainname ravneholm26.dk
OPTION: 44 ( 4) NetBIOS name server 192.168.1.1
---------------------------------------------------------------------------
TIME: 19:07:55.498297
IP: > (my:t4:2m:ac:ad:dr) > (ff:ff:ff:ff:ff:ff)
OP: 1 (BOOTPREQUEST)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: c2693933
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: my:t4:2m:ac:ad:dr:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 3 (DHCPREQUEST)
OPTION: 54 ( 4) Server identifier 192.168.1.1
OPTION: 50 ( 4) Request IP address 192.168.1.8
OPTION: 60 ( 3) Vendor class identifier d-i
OPTION: 55 ( 7) Parameter Request List 1 (Subnet mask)
28 (Broadcast address)
2 (Time offset)
3 (Routers)
15 (Domainname)
6 (DNS server)
12 (Host name)
---------------------------------------------------------------------------
TIME: 19:07:55.508238
IP: > (se:rv:er:ad:dr:es) > (my:t4:2m:ac:ad:dr)
OP: 2 (BOOTPREPLY)
HTYPE: 1 (Ethernet)
HLEN: 6
HOPS: 0
XID: c2693933
SECS: 0
FLAGS: 0
CIADDR: 0.0.0.0
YIADDR: 192.168.1.8
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: my:t4:2m:ac:ad:dr:00:00:00:00:00:00:00:00:00:00
SNAME: .
FNAME: .
OPTION: 53 ( 1) DHCP message type 5 (DHCPACK)
OPTION: 54 ( 4) Server identifier 192.168.1.1
OPTION: 51 ( 4) IP address leasetime 864000 (1w3d)
OPTION: 3 ( 4) Routers 192.168.1.1
OPTION: 5 ( 4) Name server 192.168.1.1
OPTION: 6 ( 4) DNS server 192.168.1.1
OPTION: 15 ( 14) Domainname ravneholm26.dk
OPTION: 44 ( 4) NetBIOS name server 192.168.1.1
When I compare this output to what happens on non-debian-installer DHCP
requests, I do not see any real differences.
--
Jens Peter Secher
_DD6A 05B0 174E BFB2 D4D9 B52E 0EE5 978A FE63 E8A1 jpsecher gmail com_
A. Because it breaks the logical sequence of discussion
Q. Why is top posting bad?