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traceoptions (Protocols IPv6 Neighbor Discovery)

Syntax

Hierarchy Level

Release Information

Statement introduced before Junos OS Release 7.4.

Description

For IPv6 neighbor discovery, specify router advertisement protocol-level tracing options.

Trace IPv6 Neighbor Discovery protocol traffic to help debug Neighbor Discovery protocol issues.

Global tracing options are inherited from the configuration set by the traceoptions statement at the [edit routing-options] hierarchy level. You can override the following global trace options for the IPv6 Neighbor Discovery protocol using the traceoptions flag statement included at the [edit protocols router-advertisement] hierarchy level:

Default

The default trace options are inherited from the global traceoptions statement.

Options

disable—(Optional) Disable the tracing operation. One use of this option is 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 in quotation marks. We recommend that you place router advertisement tracing output in the file /var/log/router-advertisement-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 must also specify a maximum file size with the size option.

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

• all—All tracing operations

  Note: Use the trace flag all with caution as this may cause the CPU to become very busy.

• general—A combination of the normal and route trace operations
• normal—All normal operations.

• policy—Policy operations and actions
• route—Routing table changes
• state—State transitions
• task—IPv6 interface transactions and processing
• timer—IPv6 neighbor discovery protocol timer processing

no-world-readable—(Optional) Prevent any user from reading the log file.

size size—(Optional) Maximum size of each trace file, in kilobytes (KB) or megabytes (MB). When a trace file named trace-file reaches this size, it is renamed trace-file.0. When the trace-file again reaches its maximum 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. If you specify a maximum file size, you must also specify a maximum number of trace files with the files option.

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

Required Privilege Level

routing—To view this statement in the configuration.

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