Router# debug ip dhcp server packet 

*Dec 19 04:51:25.675: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
*Dec 19 04:51:26.583: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down
*Dec 19 04:51:41.275: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
*Dec 19 04:51:42.643: DHCPD: DHCPDISCOVER received from client 0100.50ba.eefa.d0 on interface FastEthernet0/0.
*Dec 19 04:51:46.643: DHCPD: DHCPDISCOVER received from client 0100.50ba.eefa.d0 on interface FastEthernet0/0.
*Dec 19 04:51:55.643: DHCPD: DHCPDISCOVER received from client 0100.50ba.eefa.d0 on interface FastEthernet0/0.
*Dec 19 04:52:10.639: DHCPD: DHCPDISCOVER received from client 0100.50ba.eefa.d0 on interface FastEthernet0/0.
*Dec 19 04:52:47.639: DHCPD: DHCPDISCOVER received from client 0100.50ba.eefa.d0 on interface FastEthernet0/0.
*Dec 19 04:52:50.635: DHCPD: DHCPDISCOVER received from client 0100.50ba.eefa.d0 on interface FastEthernet0/0.
*Dec 19 04:52:58.635: DHCPD: DHCPDISCOVER received from client 0100.50ba.eefa.d0 on interface FastEthernet0/0.
*Dec 19 04:53:13.635: DHCPD: DHCPDISCOVER received from client 0100.50ba.eefa.d0 on interface FastEthernet0/0.
*Dec 19 04:53:14.963: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down
*Dec 19 04:53:17.271: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
*Dec 19 04:53:19.371: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
*Dec 19 04:53:26.339: DHCPD: DHCPDISCOVER received from client 0100.50ba.eefa.d0 on interface FastEthernet0/1.
*Dec 19 04:53:26.339: DHCPD: Sending DHCPOFFER to client 0100.50ba.eefa.d0 (10.10.0.2).
*Dec 19 04:53:26.339: DHCPD: Including FQDN option name 'NEO.' rcode1=0, rcode2=0 flags=0x0
*Dec 19 04:53:26.339: DHCPD: broadcasting BOOTREPLY to client 0050.baee.fad0.
*Dec 19 04:53:26.343: DHCPD: DHCPREQUEST received from client 0100.50ba.eefa.d0.
*Dec 19 04:53:26.343: DHCPD: No default domain to append - abort update
*Dec 19 04:53:26.343: DHCPD: Sending DHCPACK to client 0100.50ba.eefa.d0 (10.10.0.2).
*Dec 19 04:53:26.343: DHCPD: broadcasting BOOTREPLY to client 0050.baee.fad0.
*Dec 19 04:53:31.143: DHCPD: DHCPREQUEST received from client 0100.50ba.eefa.d0.
*Dec 19 04:53:31.143: DHCPD: No default domain to append - abort update
*Dec 19 04:53:31.143: DHCPD: Sending DHCPACK to client 0100.50ba.eefa.d0 (10.10.0.2).
*Dec 19 04:53:31.143: DHCPD: unicasting BOOTREPLY to client 0050.baee.fad0 (10.10.0.2).