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traceoptions (Protocols PPP Service)


Hierarchy Level


Define tracing operations for PPP service processes.


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

disable—Disable this trace flag.

filter—Additional filter to refine the output to display particular subscribers. Filtering based on the following subscriber identifiers simplifies troubleshooting in a scaled environment.

Best Practice:

Due to the complexity of agent circuit identifiers and agent remote identifiers, we recommend that you do not try an exact match when filtering on these options. For service names, searching on the exact name is appropriate, but you can also use a regular expression with that option.

  • aci regular-expression—Regular expression to match the agent circuit identifier provided by PPP client.

  • ari regular-expression—Regular expression to match the agent remote identifier provided by PPP client.

  • service regular-expression—Regular expression to match the name of PPPoE service.

  • underlying-interface interface-name—Name of a PPP underlying interface. You cannot use a regular expression for this filter option.

  • user user@domain—Username of a subscriber. Optionally use an asterisk (*) as a wildcard to substitute for characters at the beginning or end of either term or both terms.

flag flag—Tracing operation to perform. To specify more than one tracing operation, include multiple flag statements. You can include the following flags:

  • accounting-statistics—Trace accounting statistics events.

  • all—Trace all operations.

  • authentication—Trace authentication events.

  • chap—Trace CHAP events.

  • events—Trace interface events.

  • gres—Trace GRES events.

  • init—Trace daemon initialization events.

  • interface-db—Trace interface database events.

  • lcp—Trace LCP state machine events.

  • memory—Trace memory processing events.

  • ncp—Trace NCP state machine events.

  • packet-error—Trace packet error events.

  • pap—Trace PAP events.

  • parse—Trace parsing events.

  • profile—Trace libdynamic profile events.

  • receive-packets—Trace received PPP packets.

  • routing-process—Trace routing process interactions.

  • rtp—Trace real-time priority events.

  • rtsock—Trace routing socket events.

  • session-db—Trace session database interactions.

  • smi-services-sentry—Trace SMI services requests and retries.

  • states—Trace state machine events.

  • transmit-packets—Trace transmitted PPP packets.

  • tunnel—Trace L2TP tunneling events.

level—Level of tracing to perform. You can specify any of the following levels:

  • all—Match all levels.

  • error—Match error conditions.

  • info—Match informational messages.

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

  • verbose—Match verbose messages.

  • 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.

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 (KB), megabytes (MB), or gigabytes (GB). If you specify a maximum file size, you also must specify a maximum number of trace files with the files option.

  • Syntax: sizek to specify KB, sizem to specify MB, or sizeg to specify GB

  • Range: 10240 through 1073741824

  • 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 9.5.

user option added in Junos OS Release 14.1.