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Re: DHCP client problem

David,
--On Thursday, March 27, 2003 03:31:45 PM +0100 David Fokkema <fokkema@nat.vu.nl> wrote: 


I run dhcpdump and get this output at the time when my IP changes
(192.168.1.192 is the 'old' address, 192.168.1.2 is the dhcpd):

  TIME: 14:06:30.215030
    IP: 192.168.1.192.68 (0:10:a4:f5:63:d6) > 192.168.1.2.67
(0:30:48:10:49:75)
    OP: 1 (BOOTPREQUEST)
 HTYPE: 1 (Ethernet)
  HLEN: 6
  HOPS: 0
   XID: affc4578
  SECS: 216
 FLAGS: 0
CIADDR: 192.168.1.192
YIADDR: 0.0.0.0
SIADDR: 0.0.0.0
GIADDR: 0.0.0.0
CHADDR: 00:10:a4:f5:63:d6:00:00:00:00:00:00:00:00:00:00
 SNAME: .
 FNAME: .
OPTION:  53 (  1) DHCP message type         3 (DHCPREQUEST)
OPTION:  51 (  4) IP address leasetime      600 (10m)
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)

After this my network link goes down and comes up again with the new
address.

Any ideas what would cause the dhcpd to give me a new address instead of
assigning the same again?


Are you sure there is not even a DHCPNAK received? And I'm puzzled, since
tcpdump|dhcpdump should show you the OFFER, REQUEST and ACK for the new
address...
I assume that these packages are exchanged right after eth0 comes up again. Unfortunately tcpdump dies when the interface goes down and the connection is back up (with a new address) already when I can start tcpdump again. :-/ 

Harry
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