DHCP allocated ip releases ip all of suddenly and does not get it again.

Unanswered Question
Aug 10th, 2009

Hi,

Below is config on 3825.

no ip dhcp use vrf connected

ip dhcp excluded-address 192.168.128.1 192.168.129.254

!

ip dhcp pool 128net

network 192.168.128.0 255.255.252.0

default-router 192.168.128.2

dns-server 192.168.128.10

lease infinite

when the client get an ip from the DHCP works for same day and all of suddenly ip get released while user working and again it doesn't ip,if the same is assigned manually it works

can anyone please suggest me what is the issue.

debug ip dhcp server packet form client Mac is 0100.15c5.0a09.c6

*Aug 10 12:10:05.189: DHCPD: DHCPDISCOVER received from client 0100.15c5.0a09.c6 on interface GigabitEthernet0/0.

*Aug 10 12:10:05.189: DHCPD: Allocate an address without class information (192.168.128.0)

*Aug 10 12:10:10.189: DHCPD: DHCPDISCOVER received from client 0100.15c5.0a09.c6 on interface GigabitEthernet0/0.

*Aug 10 12:10:10.189: DHCPD: Allocate an address without class information (192.168.128.0)

*Aug 10 12:10:15.505: DHCPD: BOOTREQUEST received from BOOTP client 0017.ef91.cb00 on interface GigabitEthernet0/0.

*Aug 10 12:10:15.505: DHCPD: Sending BOOTREPLY to BOOTP client 0017.ef91.cb00 (192.168.130.89).

*Aug 10 12:10:15.505: DHCPD: creating ARP entry (192.168.130.89, 0017.ef91.cb00).

*Aug 10 12:10:15.505: DHCPD: unicasting BOOTREPLY to client 0017.ef91.cb00 (192.168.130.89).

*Aug 10 12:10:16.729: DHCPD: DHCPINFORM received from client 0100.1422.2e78.43 (192.168.131.97).

*Aug 10 12:10:16.729: DHCPD: Sending DHCPACK to client 0100.1422.2e78.43 (192.168.131.97).

*Aug 10 12:10:16.729: DHCPD: unicasting BOOTREPLY to client 0014.222e.7843 (192.168.131.97).

*Aug 10 12:10:18.189: DHCPD: DHCPDISCOVER received from client 0100.15c5.0a09.c6 on interface GigabitEthernet0/0.

*Aug 10 12:10:18.189: DHCPD: Allocate an address without class information (192.168.128.0)

*Aug 10 12:10:19.733: DHCPD: DHCPINFORM received from client 0100.1422.2e78.43 (192.168.131.97).

*Aug 10 12:10:19.733: DHCPD: Sending DHCPACK to client 0100.1422.2e78.43 (192.168.131.97).

*Aug 10 12:10:19.733: DHCPD: unicasting BOOTREPLY to client 0014.222e.7843 (192.168.131.97).

*Aug 10 12:10:34.185: DHCPD: DHCPDISCOVER received from client 0100.15c5.0a09.c6 on interface GigabitEthernet0/0.

*Aug 10 12:10:34.185: DHCPD: Allocate an address without class information (192.168.128.0)*Aug 10 12:11:05.873: DHCPD: BOOTREQUEST received from BOOTP client 0017.ef9e.1e00 on interface GigabitEthernet0/0.

*Aug 10 12:11:05.873: DHCPD: Sending BOOTREPLY to BOOTP client 0017.ef9e.1e00 (192.168.130.87).

*Aug 10 12:11:05.873: DHCPD: creating ARP entry (192.168.130.87, 0017.ef9e.1e00).

*Aug 10 12:11:05.873: DHCPD: unicasting BOOTREPLY to client 0017.ef9e.1e00 (192.168.130.87).*Aug 10 12:11:16.141: DHCPD: BOOTREQUEST received from BOOTP client 0017.ef91.cb00 on interface GigabitEthernet0/0.

*Aug 10 12:11:16.141: DHCPD: Sending BOOTREPLY to BOOTP client 0017.ef91.cb00 (192.168.130.89).

*Aug 10 12:11:16.141: DHCPD: creating ARP entry (192.168.130.89, 0017.ef91.cb00).

*Aug 10 12:11:16.141: DHCPD: unicasting BOOTREPLY to client 0017.ef91.cb00 (192.168.130.89).

*Aug 10 12:11:33.725: DHCPD: DHCPDISCOVER received from client 0100.15c5.0a09.c6 on interface GigabitEthernet0/0.

*Aug 10 12:11:33.725: DHCPD: Allocate an address without class information (192.168.128.0)

*Aug 10 12:11:36.717: DHCPD: DHCPDISCOVER received from client 0100.15c5.0a09.c6 on interface GigabitEthernet0/0.

*Aug 10 12:11:36.717: DHCPD: Allocate an address without class information (192.168.128.0)

*Aug 10 12:11:44.717: DHCPD: DHCPDISCOVER received from client 0100.15c5.0a09.c6 on interface GigabitEthernet0/0.

*Aug 10 12:11:44.717: DHCPD: Allocate an address without class information (192.168.128.0)

*Aug 10 12:11:59.669: DHCPD: DHCPDISCOVER received from client 0100.15c5.0a09.c6 on interface GigabitEthernet0/0.

*Aug 10 12:11:59.669: DHCPD: Allocate an address without class information (192.168.128.0)

I have this problem too.
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alcolsto Mon, 04/09/2012 - 07:28

Check to make sure you have not accidentally excluded the network address range. You need to make sure if your exclusion range was changed, that the old range is removed with the "no" command.

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