Chassis Configuration Features in the Junos OS

The Junos OS enables you to configure several properties of the router chassis, including the following:

• Conditions that activate the red and yellow alarm LEDs on the router’s craft interface
• SONET/SDH framing and concatenation properties for individual PICs
• Source for clock synchronization
• Synchronization of the system Stratum 3 clock to an external source (M40e, M120, and M320 routers only)