Duplicated IP's

[Randall C Grimshaw]

If you combine your syslog for the two peer servers you will probably see that the conflicting address was offered by the peer but not accepted by the client - which did accept the alternate offer. You may not need to be concerned about this message.
I use the 'deny duplicates;' configuration option. it is documented in 'man dhcpd.conf' YMMV.

Randall Grimshaw rgrimsha at syr.edu<mailto:rgrimsha at syr.edu>

________________________________
From: dhcp-users-bounces+rgrimsha=syr.edu at lists.isc.org [dhcp-users-bounces+rgrimsha=syr.edu at lists.isc.org] on behalf of Moayad mohammad [mailinglists at bluezonejordan.com]
Sent: Tuesday, February 14, 2012 10:11 AM
To: 'Users of ISC DHCP'
Subject: RE: Duplicated IP's

Hi,

I moved all the reserved addresses out of the range pool, but still I got the same problem and found the following records in the log files
                                “uid lease xxx for client 00:33:19:01:0a:91 is duplicate on wimax”

Regards,
Moayad

From: dhcp-users-bounces+mailinglists=bluezonejordan.com at lists.isc.org [mailto:dhcp-users-bounces+mailinglists=bluezonejordan.com at lists.isc.org] On Behalf Of José Queiroz
Sent: Tuesday, February 14, 2012 5:08 PM
To: Users of ISC DHCP
Subject: Re: Duplicated IP's

Hi Mohammad,

Unfortunatelly I cannot help you in this problem with the urgency that you need. I suggest you to verify the condition that Chris Buxton said in his last message, and try to move the reserved addresses out of the address pool.
Em 14 de fevereiro de 2012 12:45, Moayad mohammad <mailinglists at bluezonejordan.com<mailto:mailinglists at bluezonejordan.com>> escreveu:
Dear Jose,
                Thank you for your email, but I need your help to review my dhcp configuration file.

                I am sorry to disturb you and send email directly to your personal email without sending to the mailing list, I have urgent issue and I have to solve it.
Thanks again.

Regards



From: dhcp-users-bounces+mailinglists=bluezonejordan.com at lists.isc.org<mailto:bluezonejordan.com at lists.isc.org> [mailto:dhcp-users-bounces+mailinglists<mailto:dhcp-users-bounces%2Bmailinglists>=bluezonejordan.com at lists.isc.org<mailto:bluezonejordan.com at lists.isc.org>] On Behalf Of José Queiroz
Sent: Sunday, February 12, 2012 8:48 PM
To: Users of ISC DHCP
Subject: Re: Duplicated IP's


2012/2/12 Moayad mohammad <mailinglists at bluezonejordan.com<mailto:mailinglists at bluezonejordan.com>>
Dears,
                I am facing problems with my DHCP server to serve our WiMAX customers (DHCP Version: dhcp-4.2.1-P1) as follows:

1-      sometimes the dhcpd service provide CPE with duplicated IP’s (Already assigned or reserved to other CPE), so the CPE connect for 1-2 seconds then disconnected then try again to connect and get the same duplicated IP then disconnected. To solve this issue I have to add new pool of IP’s.

I remember a similar case, it was happening because the CPE were sending the same DHCP ID, or a bogus one (all zeros). Can you watch DHCP logs, and see what the problematic CPEs send to you?


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