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traceoptions (MX Series Virtual Chassis)


Hierarchy Level


Define tracing operations for the MX Series Virtual Chassis configuration.


Tracing operations are disabled.


detail—(Optional) Generate detailed trace information for a flag.

disable—(Optional) Disable a flag.

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. 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. 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. You can include the following flags:

  • all—All tracing operations.

  • auto-configuration—Trace Virtual Chassis ports that have been automatically configured.

  • csn—Trace Virtual Chassis complete sequence number (CSN) packets.

  • error—Trace Virtual Chassis errored packets.

  • graceful-restart—Trace Virtual Chassis graceful restart events.

  • hello—Trace Virtual Chassis hello packets.

  • krt—Trace Virtual Chassis kernel routing table (KRT) events.

  • lsp—Trace Virtual Chassis link-state packets.

  • lsp-generation—Trace Virtual Chassis link-state packet generation.

  • me—Trace Virtual Chassis primary-role election (ME) events.

  • normal—Trace normal events.

  • packets—Trace Virtual Chassis packets.

  • parse—Trace reading of the configuration.

  • psn—Trace partial sequence number (PSN) packets.

  • route—Trace Virtual Chassis routing information.

  • spf—Trace Virtual Chassis shortest-path-first (SPF) events.

  • state—Trace Virtual Chassis state transitions.

  • task—Trace Virtual Chassis task operations.

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

no-stamp—(Optional) Do not place a timestamp on any trace file.

no-world-readable—(Optional) Restrict file access to the user who created the file.

receive—(Optional) Trace received packets.

replace—(Optional) Replace a trace file instead of appending information to it.

send—(Optional) Trace transmitted packets.

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

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

Required Privilege Level

routing—To view this statement in the configuration.

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

Release Information

Statement introduced in Junos OS Release 11.2.