Configuring the Name of the Virtual Chassis Trace Log File
To trace operations for a Virtual Chassis, you must configure the name of the trace log file that the software saves in the /var/log directory.
To configure the filename for tracing Virtual Chassis operations:
On the device to be designated as the primary of the Virtual Chassis, specify the name of the trace log file.
[edit virtual-chassis] user@host# set traceoptions file filename