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Tracing BOOTP, DNS, and TFTP Forwarding Operations

BOOTP, DNS, and TFTP forwarding tracing operations track all BOOTP, DNS, and TFTP operations and record them in a log file. The logged error descriptions provide detailed information to help you solve problems faster.

By default, nothing is traced. If you include the traceoptions statement at the [edit forwarding-options helpers] hierarchy level, the default tracing behavior is the following:

Important events are logged in a file called fud located in the /var/log directory.
When the file fud reaches 128 kilobytes (KB), it is renamed fud.0, then fud.1, and so on, until there are 3 trace files. Then the oldest trace file (fud.2) is overwritten. (For more information about how log files are created, see the JUNOS System Log Messages Reference.)
Log files can be accessed only by the user who configures the tracing operation.

You cannot change the directory (/var/log) in which trace files are located. However, you can customize the other trace file settings by including the following statements at the [edit forwarding-options helpers] hierarchy level:



[edit forwarding-options helpers]
file filename <files number> <size size> <(world-readable
| no-world-readable)> <match regex>;
flag {
all;
configuration;
database;
events;
policy;
server;
timer-events;
}

These statements are described in the following sections:

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