#tail -f /var/log/messages

Oct 17 16:08:32 linux2 dhcpd: For info, please visit https://www.isc.org/software/dhcp/
Oct 17 16:08:34 linux2 dhcpd: Internet Systems Consortium DHCP Server 4.1.1-P1
Oct 17 16:08:34 linux2 dhcpd: Copyright 2004-2010 Internet Systems Consortium.
Oct 17 16:08:34 linux2 dhcpd: All rights reserved.
Oct 17 16:08:34 linux2 dhcpd: For info, please visit https://www.isc.org/software/dhcp/
Oct 17 16:08:34 linux2 dhcpd: Internet Systems Consortium DHCP Server 4.1.1-P1
Oct 17 16:08:34 linux2 dhcpd: Copyright 2004-2010 Internet Systems Consortium.
Oct 17 16:08:34 linux2 dhcpd: All rights reserved.
Oct 17 16:08:34 linux2 dhcpd: For info, please visit https://www.isc.org/software/dhcp/
Oct 17 16:08:34 linux2 dhcpd: Wrote 0 leases to leases file.
Oct 17 16:09:55 linux2 dhcpd: Internet Systems Consortium DHCP Server 4.1.1-P1
Oct 17 16:09:55 linux2 dhcpd: Copyright 2004-2010 Internet Systems Consortium.
Oct 17 16:09:55 linux2 dhcpd: All rights reserved.
Oct 17 16:09:55 linux2 dhcpd: For info, please visit https://www.isc.org/software/dhcp/
Oct 17 16:09:57 linux2 dhcpd: Internet Systems Consortium DHCP Server 4.1.1-P1
Oct 17 16:09:57 linux2 dhcpd: Copyright 2004-2010 Internet Systems Consortium.
Oct 17 16:09:57 linux2 dhcpd: All rights reserved.
Oct 17 16:09:57 linux2 dhcpd: For info, please visit https://www.isc.org/software/dhcp/
Oct 17 16:09:58 linux2 dhcpd: Internet Systems Consortium DHCP Server 4.1.1-P1
Oct 17 16:09:58 linux2 dhcpd: Copyright 2004-2010 Internet Systems Consortium.
Oct 17 16:09:58 linux2 dhcpd: All rights reserved.
Oct 17 16:09:58 linux2 dhcpd: For info, please visit https://www.isc.org/software/dhcp/
Oct 17 16:09:58 linux2 dhcpd: Wrote 0 leases to leases file.
Oct 17 16:11:44 linux2 dhcpd: DHCPDISCOVER from 00:24:54:d2:69:09 via eth0
Oct 17 16:11:45 linux2 dhcpd: DHCPOFFER on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:11:49 linux2 dhcpd: DHCPDISCOVER from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:11:49 linux2 dhcpd: DHCPOFFER on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:11:49 linux2 dhcpd: DHCPREQUEST for 192.168.20.200 (192.168.20.1) from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:11:49 linux2 dhcpd: DHCPACK on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:11:59 linux2 dhcpd: DHCPINFORM from 192.168.20.200 via eth0: not authoritative for subnet 192.168.20.0
Oct 17 16:11:59 linux2 dhcpd: If this DHCP server is authoritative for that subnet,
Oct 17 16:11:59 linux2 dhcpd: please write an `authoritative;' directive either in the
Oct 17 16:11:59 linux2 dhcpd: subnet declaration or in some scope that encloses the
Oct 17 16:11:59 linux2 dhcpd: subnet declaration - for example, write it at the top
Oct 17 16:11:59 linux2 dhcpd: of the dhcpd.conf file.
Oct 17 16:12:00 linux2 dhcpd: DHCPINFORM from 192.168.20.200 via eth0: not authoritative for subnet 192.168.20.0
Oct 17 16:12:02 linux2 dhcpd: DHCPINFORM from 192.168.20.200 via eth0: not authoritative for subnet 192.168.20.0
Oct 17 16:12:05 linux2 dhcpd: DHCPINFORM from 192.168.20.200 via eth0: not authoritative for subnet 192.168.20.0
Oct 17 16:16:48 linux2 dhcpd: DHCPREQUEST for 192.168.20.200 from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:16:48 linux2 dhcpd: DHCPACK on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:21:48 linux2 dhcpd: DHCPREQUEST for 192.168.20.200 from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:21:48 linux2 dhcpd: DHCPACK on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:23:04 linux2 dhcpd: DHCPREQUEST for 192.168.20.200 from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:23:04 linux2 dhcpd: DHCPACK on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:23:12 linux2 dhcpd: DHCPREQUEST for 10.0.88.30 from 00:19:e7:42:72:b5 via eth0: ignored (not authoritative).
Oct 17 16:23:14 linux2 dhcpd: DHCPDISCOVER from 00:19:e7:42:72:b5 via eth0
Oct 17 16:23:15 linux2 dhcpd: DHCPOFFER on 192.168.20.201 to 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:23:15 linux2 dhcpd: DHCPREQUEST for 192.168.20.201 (192.168.20.1) from 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:23:15 linux2 dhcpd: DHCPACK on 192.168.20.201 to 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:28:04 linux2 dhcpd: DHCPREQUEST for 192.168.20.200 from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:28:04 linux2 dhcpd: DHCPACK on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:28:16 linux2 dhcpd: DHCPREQUEST for 192.168.20.201 from 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:28:16 linux2 dhcpd: DHCPACK on 192.168.20.201 to 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:31:06 linux2 dhcpd: DHCPINFORM from 192.168.20.200 via eth0: not authoritative for subnet 192.168.20.0
Oct 17 16:31:09 linux2 dhcpd: DHCPINFORM from 192.168.20.200 via eth0: not authoritative for subnet 192.168.20.0
Oct 17 16:32:12 linux2 dhcpd: DHCPREQUEST for 192.168.20.200 from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:32:12 linux2 dhcpd: DHCPACK on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:32:20 linux2 dhcpd: DHCPREQUEST for 192.168.20.201 from 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:32:20 linux2 dhcpd: DHCPACK on 192.168.20.201 to 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:32:55 linux2 dhcpd: DHCPINFORM from 192.168.20.200 via eth0: not authoritative for subnet 192.168.20.0
Oct 17 16:32:58 linux2 dhcpd: DHCPINFORM from 192.168.20.200 via eth0: not authoritative for subnet 192.168.20.0
Oct 17 16:37:12 linux2 dhcpd: DHCPREQUEST for 192.168.20.200 from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:37:12 linux2 dhcpd: DHCPACK on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:37:21 linux2 dhcpd: DHCPREQUEST for 192.168.20.201 from 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:37:21 linux2 dhcpd: DHCPACK on 192.168.20.201 to 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:41:48 linux2 dhcpd: DHCPREQUEST for 192.168.20.201 from 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:41:48 linux2 dhcpd: DHCPACK on 192.168.20.201 to 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:42:12 linux2 dhcpd: DHCPREQUEST for 192.168.20.200 from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:42:12 linux2 dhcpd: DHCPACK on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:46:48 linux2 dhcpd: DHCPREQUEST for 192.168.20.201 from 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:46:48 linux2 dhcpd: DHCPACK on 192.168.20.201 to 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:47:12 linux2 dhcpd: DHCPREQUEST for 192.168.20.200 from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:47:12 linux2 dhcpd: DHCPACK on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:51:48 linux2 dhcpd: DHCPREQUEST for 192.168.20.201 from 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:51:48 linux2 dhcpd: DHCPACK on 192.168.20.201 to 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:52:12 linux2 dhcpd: DHCPREQUEST for 192.168.20.200 from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:52:12 linux2 dhcpd: DHCPACK on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:56:48 linux2 dhcpd: DHCPREQUEST for 192.168.20.201 from 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:56:48 linux2 dhcpd: DHCPACK on 192.168.20.201 to 00:19:e7:42:72:b5 (SEP0019E74272B5) via eth0
Oct 17 16:57:12 linux2 dhcpd: DHCPREQUEST for 192.168.20.200 from 00:24:54:d2:69:09 (rf510) via eth0
Oct 17 16:57:12 linux2 dhcpd: DHCPACK on 192.168.20.200 to 00:24:54:d2:69:09 (rf510) via eth0
^C