Configuring a Regular Expression for Extended DHCP Lines to Be Logged
By default, the trace operation output includes all lines relevant to the logged events. You can refine the output by including regular expressions that will be matched.
To configure regular expressions to be matched, specify the regular expression. DHCP local server and DHCP relay agent both support the match option for the traceoptions statement.
[edit system services dhcp-local-server traceoptions]user@host# set file filename match regular-expression
