DHCP Server - Eth0

[Michael Koponick]

Glenn,

I'm currently using version isc-dhcpd-4.1.0 of DHCPD.

As for snooping around. I only have the logs to go by.

I found this while looking at the log this morning:

Jun 18 14:19:08 corp-007 dhcpd: DHCPREQUEST for 192.168.11.204 from
00:0a:95:cc:79:e8 via eth0: ignored (not authoritative).

Jun 18 14:19:09 corp-007 dhcpd: DHCPREQUEST for 192.168.11.204 from
00:0a:95:cc:79:e8 via eth0: ignored (not authoritative).

Jun 18 14:19:12 corp-007 dhcpd: DHCPREQUEST for 192.168.11.204 from
00:0a:95:cc:79:e8 via eth0: ignored (not authoritative).

Jun 18 14:19:16 corp-007 dhcpd: DHCPDISCOVER from 00:0a:95:cc:79:e8 via
eth0: network 10.22.10.0/24: no free leases

As you can see, the MAC address of 00:0a:95:cc:79:e8 gets ignored on the
correct subnet, then it seems to want to go to another subnet it thinks its
authorized.

Thanks in advance for your help.

Mike



On 6/18/09 9:37 PM, "Glenn Satchell" <Glenn.Satchell at uniq.com.au> wrote:

> Hi Mike
> 
> Your dhcpd.conf definitions look just fine. The empty subnet
> declaration is exactly the right answer to the start up error message.
> 
> No idea why requests drop off though. Can you snoop the traffic to see
> if any requests are still coming in, even though dhcpd is not
> responding?
> 
> What version of dhcpd are you using (dhcpd --version). You may need a
> newer (or older) version.
> 
> regards,
> -glenn
> 
>> Subject: DHCP Server - Eth0
>> Date: Thu, 18 Jun 2009 23:24:12 -0500
>> 
>> 
>> Hello,
>> 
>> I'm new to this list, but I have been working with various DHCP servers over
> the years.
>> 
>> I have a DHCP server running on Fedora 11, which works fine, however I have
> been running into an
>> issue.
>> 
>> The subnet that the DHCP server is installed, will not serve any DHCP
>> addresses 
> for that subnet. All
>> subnets are remote.
>> 
>> When I first configured dhcpd.conf, and try to start the DHCP server, I had a
> FAILED error because there was not a local subnet configured
>> in dhcpd.conf.
>> 
>> I went ahead and configured a subnet, basically a declaration, however the
>> DHCP 
> server will stop handing out addresses for the remote IP's and try to hand out
> addresses on the local network interface. Of course this fails miserably when
> there are no addresses to hand out, since that subnet will not have any DHCP
> clients.
>> 
>> DHCPD.CONF:
>> 
>> subnet 192.168.11.0 netmask 255.255.255.0 {
>>       option routers                  192.168.11.1; #Default Gateway
>>       option subnet-mask              255.255.255.0;
>>       option domain-name              "domain.com";
>>       option domain-name-servers      10.22.10.150;
>>    range  192.168.11.51 192.168.11.200;  #DHCP Range to assign
>>       default-lease-time 43200;
>>       max-lease-time 86400;
>>        authoritative;
>> 
>> }
>> subnet 172.16.0.0 netmask 255.255.255.0 {
>>       option routers                  172.16.0.1; #Default Gateway
>>       option subnet-mask              255.255.255.0;
>>       option domain-name              "domain.com";
>>       option domain-name-servers      10.22.10.150;
>>    range 172.16.0.51 172.16.0.200;  #DHCP Range to assign
>>       default-lease-time 43200;
>>       max-lease-time 86400;
>> }
>> 
>> subnet 10.22.10.0 netmask 255.255.255.0 {
>> }
>> 
>> 
>> The local network for this server is the 10.22.10.x subnet.
>> 
>> Thoughts?
>> 
>> Thanks in advance,
>> 
>> Mike
>> 
>> 
>> 
>> _______________________________________________
>> dhcp-users mailing list
>> dhcp-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/dhcp-users
> 
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Mike Koponick | Manager, IT & Compliance

Chockstone - A Heartland Payment Systems Company

326 SW Broadway | Portland OR 97205

Phone (503) 907-2385 Fax (503) 227-4324
Michael.Koponick at e-hps.com
 

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