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traceoptions {file filename <files number> <size size> <world-readable | no-world-readable>; flag flag <flag-modifier> <disable>; }

Hierarchy Level

[edit logical-systems logical-system-name protocols ldp],[edit logical-systems logical-system-name routing-instances routing-instance-name protocols ldp],[edit protocols ldp],[edit routing-instances routing-instance-name protocols ldp]

Release Information

Statement introduced before JUNOS Release 7.4.


LDP protocol-level trace options.


The default LDP protocol-level trace options are inherited from the routing protocols traceoptions statement included at the [edit routing-options] hierarchy level.


disable—(Optional) Disable the tracing operation. You can use this option to disable a single operation when you have defined a broad group of tracing operations, such as all.

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. We recommend that you place LDP tracing output in the file ldp-log.

files number—(Optional) Maximum number of trace files. When a trace file named trace-file reaches its maximum size, it is renamed trace-file.0, then trace-file.1, and so on, until the maximum number of trace files is reached. Then the oldest trace file is overwritten.

Range: 2 through 1000
Default: 2 files

If you specify a maximum number of files, you must also include the size statement to specify the maximum file size.

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

  • address—Operation of address and address withdrawal messages
  • binding—Label-binding operations
  • error—Error conditions
  • event—Protocol events
  • initialization—Operation of initialization messages
  • label—Operation of label request, label map, label withdrawal, and label release messages
  • notification—Operation of notification messages
  • packets—Equivalent to setting address, initialization, label, notification, and periodic flags
  • path—Label-switched path operations
  • periodic—Operation of hello and keepalive messages
  • route—Operation of route messages
  • state—Protocol state transitions

flag-modifier—(Optional) Modifier for the tracing flag. You can specify one or more of these modifiers:

  • detail—Provide detailed trace information.
  • disable—Disable this trace flag.
  • filter—Filter to apply to this flag. The filter flag modifier can be applied only to the route, path, and binding flags. This flag modifier has the following options:

    • match-on—Match on argument specified. The match-on option has the following suboption: fec, a filter based on the FEC associated with the traced object.
    • policy policy-name—Specify the filter policy.
  • receive—Packets being received.
  • send—Packets being transmitted.

no-world-readable—(Optional) Pevent all users from reading the log file.

size size—(Optional) Maximum size of each trace file, in kilobytes (KB), megabytes (MB), or gigabytes (GB). When a trace file named trace-file reaches this size, it is renamed trace-file.0. When the trace-file again reaches this size, trace-file.0 is renamed trace-file.1 and trace-file is renamed trace-file.0. This renaming scheme continues until the maximum number of trace files is reached. Then the oldest trace file is overwritten.

Syntax: xk to specify KB, xm to specify MB, or xg to specify GB
Range: 10 KB through the maximum file size supported on your system
Default: 1 MB

If you specify a maximum file size, you must also include the files statement to specify the maximum number of files.

world-readable—(Optional) Enable any user to read the log file.

Required Privilege Level

routing and trace—To view this statement in the configuration.

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

Published: 2010-04-28

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