Apr 29 08:13:43 tstack-centos5 dhclient: DHCPOFFER from 10.1.10.1
 key  41:41                                          ^                          
 sym  41:50                                           ^-------^                 DHCPOFFER
pair  41:50                                           ^-------^                 DHCPOFFER
 key  56:56                                                         ^           
ipv4  56:65                                                          ^-------^  10.1.10.1
pair  56:65                                                          ^-------^  10.1.10.1
msg         :DHCPOFFER from 10.1.10.1
format      :# from #
{
    "col_0": "DHCPOFFER",
    "col_1": "10.1.10.1"
}