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Re: HELP! dhcp server not talking to clients



hey charles, are you sure another machine isn't running a dhcpd?  i
sure don't see 192 addresses in your config...  try installing nmap
and then doing

# nmap -sU -p 67 host

for all the suspect hosts.  

hth
	sean

On Mon, Dec 16, 2002 at 11:53:00PM -0600, Charles Lewis wrote:
> I have dhcp set up on my linux box to serve a Win2000 box, a Win98 box, 
> a WinXP box, and networked HP LJ1200. It works fine, until I try to 
> upgrade the kernel from 2.4.18 to 2.4.20 (from an earlier thread). The 
> machine locks up after a few minutes, so I go back to 2.4.18, and all my 
>   machines are getting 198.168.1.x numbers when my dhcp server is 
> supposed to be providing 10.0.0.x numbers. It's very frustrating to 
> everyone in the house because suddenly none of them can use the 
> internet, print, or save files to their samba shares. Now I am not a 
> network guru, so maybe someone can help me spot some problems in my setup.
> 
> Here is my dhcpd.conf:
> 
> #option domain-name "";
> #option domain-name-servers 205.165.192.254,205.165.193.254;
> 
> server-identifier lewisc;
> authoritative;
> option subnet-mask 255.255.255.0;
> default-lease-time 600;
> max-lease-time 7200;
> subnet 10.0.0.0 netmask 255.255.255.0 {
>    range 10.0.0.6 10.0.0.254;
>    option broadcast-address 10.0.0.255;
>    option routers 10.0.0.1;
>    option netbios-name-servers 10.0.0.1;
> }
> 
> host lewisc2 {
>    hardware ethernet 00:01:03:E7:48:1F;
>    fixed-address 10.0.0.2;
> }
> 
> host lewisc3 {
>    hardware ethernet 00:00:39:F0:9A:C5;
>    fixed-address 10.0.0.3;
> }
> 
> host caleb {
>    hardware ethernet 00:A0:CC:D2:A0:73;
>    fixed-address 10.0.0.4;
> }
> 
> host officelj {
>    hardware ethernet 00:01:E6:48:69:A2;
>    fixed-address 10.0.0.5;
> }
> 
> When I run dhcpd in debug mode, I get:
> 
> Listening on LPF/eth0/00:01:03:dd:22:e0/10.0.0.0
> Sending on   LPF/eth0/00:01:03:dd:22:e0/10.0.0.0
> Sending on   Socket/fallback/fallback-net
> 
> And it just sits there with no feedback.
> 
> When I do a tcpdump -i eth0, I get the following junk:
> 23:46:04.324753 192.168.1.102.netbios-dgm > 192.168.1.255.netbios-dgm: 
> NBT UDP PACKET(138)
> 23:46:33.933645 192.168.1.1.bootps > 255.255.255.255.bootpc: 
> xid:0xbee8b113 C:192.168.1.101 Y:192.168.1.101 ether 0:1:e6:48:69:a2 
> file ""[|bootp]
> 23:46:36.287786 arp who-has 192.168.1.1 tell 192.168.1.102
> 23:46:36.289146 192.168.1.1.bootps > 255.255.255.255.bootpc: 
> xid:0xf220e34f C:192.168.1.102 Y:192.168.1.102 ether 0:a0:cc:d2:a0:73 
> file ""[|bootp]
> 23:49:04.314952 192.168.1.1.bootps > 255.255.255.255.bootpc: 
> xid:0x28e8b113 C:192.168.1.101 Y:192.168.1.101 ether 0:1:e6:48:69:a2 
> file ""[|bootp]
> 23:49:06.268378 arp who-has 192.168.1.1 tell 192.168.1.102
> 23:49:06.269729 192.168.1.1.bootps > 255.255.255.255.bootpc: 
> xid:0xdd3f9a45 C:192.168.1.102 Y:192.168.1.102 ether 0:a0:cc:d2:a0:73 
> file ""[|bootp]
> 
> The last time this happened, it eventually started working, but I think 
> it may have been because the lease ran out on all the machines. *shrug* 
> I don't know but I'm ready to pull what little hair I have left out. Any 
> ideas would be GREATLY appreciated.
> 
> Charles Lewis
> 
> 
> 
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