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traceoptions (DHCP)


Hierarchy Level


Define global tracing operations for extended DHCP local server and extended DHCP relay agent processes.

This statement replaces the deprecated traceoptions statements at the [edit forwarding-options dhcp-relay] and [edit system services dhcp-local-server] hierarchy levels.


Traceoptions does not differentiate between a logical system and tenant system, and can be configured under the root logical system.


file filename—Name of the file to receive the output of the tracing operation. Enclose the name within quotation marks. All files are placed in the directory /var/log.

files number—(Optional) Maximum number of trace files to create before overwriting the oldest one. If you specify a maximum number of files, you also must specify a maximum file size with the size option.

  • Range: 2 through 1000

  • Default: 3 files

flag flag—Tracing operation to perform. To specify more than one tracing operation, include multiple flag statements:

  • all—Trace all events.

  • auth—Trace authentication events.

  • database—Trace database events.

  • fwd—Trace firewall process events.

  • general—Trace miscellaneous events.

  • ha—Trace high availability-related events.

  • era—Enables logging.
  • interface—Trace interface operations.

  • io—Trace I/O operations.

  • liveness-detection—Trace liveness detection operations.

  • packet—Trace packet and option decoding operations.

  • performance—Trace performance measurement operations.

  • profile—Trace profile operations.

  • rpd—Trace routing protocol process events.

  • rtsock—Trace routing socket operations.

  • security-persistence—Trace security persistence events.

  • session-db—Trace session database events.

  • state—Trace changes in state.

  • statistics—Trace baseline statistics.

  • ui—Trace user interface operations.

level—Level of tracing to perform; also known as severity level. The option you configure enables tracing of events at that level and all higher (more restrictive) levels. You can specify any of the following levels:

  • all—Match messages of all levels.

  • error—Match error messages.

  • info—Match informational messages.

  • notice—Match notice messages about conditions requiring special handling.

  • verbose—Match verbose messages. This is the lowest (least restrictive) severity level; when you configure verbose, messages at all higher levels are traced. Therefore, the result is the same as when you configure all.

  • warning—Match warning messages.

  • Default: error

match regular-expression—(Optional) Refine the output to include lines that contain the regular expression.

no-remote-trace—Disable remote tracing.

no-world-readable—(Optional) Disable unrestricted file access, allowing only the user root and users who have the Junos OS maintenance permission to access the trace files.

size maximum-file-size—(Optional) Maximum size of each trace file. By default, the number entered is treated as bytes. Alternatively, you can include a suffix to the number to indicate kilobytes (maximum-file-sizek), megabytes (maximum-file-sizem), or gigabytes (maximum-file-sizeg). If you specify a maximum file size, you also must specify a maximum number of trace files with the files option.

  • Range: 10,240 through 1,073,741,824

  • Default: 128 KB

world-readable—(Optional) Enable unrestricted file access.

Required Privilege Level

trace—To view this statement in the configuration.

trace-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 11.4.