DHCP Issue

VeeDubbs · 09-14-2012, 10:34 AM

Hi All -

I'm seeing the following on my DHCP server:

Code:

Sep 14 10:28:55 elroy dhcpd: DHCPDISCOVER from 30:85:a9:12:e5:8e via 10.45.0.1
Sep 14 10:28:56 elroy dhcpd: DHCPOFFER on 10.45.244.230 to 30:85:a9:12:e5:8e (Gino-PC) via 10.45.0.1
Sep 14 10:28:56 elroy dhcpd: DHCPREQUEST for 10.45.244.230 (10.2.3.4) from 30:85:a9:12:e5:8e (Gino-PC) via 10.45.0.1
Sep 14 10:28:56 elroy dhcpd: DHCPACK on 10.45.244.230 to 30:85:a9:12:e5:8e (Gino-PC) via 10.45.0.1
Sep 14 10:28:56 elroy dhcpd: Abandoning IP address 10.45.244.230: declined.
Sep 14 10:28:56 elroy dhcpd: DHCPDECLINE of 10.45.244.230 from 30:85:a9:12:e5:8e (Gino-PC) via 10.45.0.1: not found

This is just one instance...but it seems to be happening to quite a few people. Not sure what could be causing this issue.

Code:

Sep 14 10:26:22 elroy dhcpd: Abandoning IP address 10.45.84.240: declined.
Sep 14 10:26:24 elroy dhcpd: Abandoning IP address 10.45.241.237: declined.
Sep 14 10:26:33 elroy dhcpd: Abandoning IP address 10.45.85.238: declined.
Sep 14 10:26:35 elroy dhcpd: Abandoning IP address 10.45.244.231: declined.
Sep 14 10:26:55 elroy dhcpd: Abandoning IP address 10.45.248.223: declined.
Sep 14 10:27:03 elroy dhcpd: Abandoning IP address 10.45.98.211: declined.
Sep 14 10:27:06 elroy dhcpd: Abandoning IP address 10.45.250.219: declined.
Sep 14 10:27:17 elroy dhcpd: Abandoning IP address 10.45.251.217: declined.
Sep 14 10:27:28 elroy dhcpd: Abandoning IP address 10.45.255.209: declined.
Sep 14 10:27:39 elroy dhcpd: Abandoning IP address 10.45.232.254: declined.
Sep 14 10:27:50 elroy dhcpd: Abandoning IP address 10.45.236.246: declined.
Sep 14 10:28:01 elroy dhcpd: Abandoning IP address 10.45.238.242: declined.
Sep 14 10:28:12 elroy dhcpd: Abandoning IP address 10.45.239.240: declined.
Sep 14 10:28:23 elroy dhcpd: Abandoning IP address 10.45.240.238: declined.
Sep 14 10:28:34 elroy dhcpd: Abandoning IP address 10.45.242.234: declined.
Sep 14 10:28:45 elroy dhcpd: Abandoning IP address 10.45.243.232: declined.
Sep 14 10:28:56 elroy dhcpd: Abandoning IP address 10.45.244.230: declined.
Sep 14 10:29:07 elroy dhcpd: Abandoning IP address 10.45.245.228: declined.
Sep 14 10:29:18 elroy dhcpd: Abandoning IP address 10.45.246.226: declined.
Sep 14 10:29:29 elroy dhcpd: Abandoning IP address 10.45.248.222: declined.
Sep 14 10:29:40 elroy dhcpd: Abandoning IP address 10.45.250.218: declined.
Sep 14 10:29:51 elroy dhcpd: Abandoning IP address 10.45.251.216: declined.
Sep 14 10:30:02 elroy dhcpd: Abandoning IP address 10.45.254.210: declined.
Sep 14 10:30:13 elroy dhcpd: Abandoning IP address 10.45.255.208: declined.
Sep 14 10:30:24 elroy dhcpd: Abandoning IP address 10.45.234.249: declined.
Sep 14 10:30:35 elroy dhcpd: Abandoning IP address 10.45.235.247: declined.
Sep 14 10:30:46 elroy dhcpd: Abandoning IP address 10.45.236.245: declined.
Sep 14 10:30:57 elroy dhcpd: Abandoning IP address 10.45.237.243: declined.
Sep 14 10:31:08 elroy dhcpd: Abandoning IP address 10.45.238.241: declined.
Sep 14 10:31:48 elroy dhcpd: Abandoning IP address 10.45.86.236: declined.
Sep 14 10:32:27 elroy dhcpd: Abandoning IP address 10.45.88.232: declined.
Sep 14 10:38:21 elroy dhcpd: Abandoning IP address 10.21.113.137: declined.

Any insight?

TB0ne · 09-14-2012, 11:21 AM

Quote:

Originally Posted by VeeDubbs

Hi All -
I'm seeing the following on my DHCP server This is just one instance...but it seems to be happening to quite a few people. Not sure what could be causing this issue.

Code:

Sep 14 10:26:22 elroy dhcpd: Abandoning IP address 10.45.84.240: declined.
Sep 14 10:26:24 elroy dhcpd: Abandoning IP address 10.45.241.237: declined.
Sep 14 10:26:33 elroy dhcpd: Abandoning IP address 10.45.85.238: declined.
Sep 14 10:26:35 elroy dhcpd: Abandoning IP address 10.45.244.231: declined.

Any insight?

A few questions come to mind:

Are the people in question getting address(es), or are they just totally off the network?
What kind of clients are making the requests?
Is this a new problem/DHCP server?

Usually an abandon points to two possible issues: either something else grabbed that address, so your DHCP server is marking it unavailable, or the client is making a bad request, and is turned down. If you're using Windows clients...well, amazingly, the Windows DHCP client is not too well-behaved, and you'll have to modify your dhcpd.conf file to accommodate them. If something is grabbing addresses out of your DHCP range, you can either allocate a new range, or get a wiffle bat and go smack people who have just set things up without your knowledge/permission.