MX301 and MX301-M Hardware and CLI Terminology Mapping

Table 1: Junos OS CLI Equivalents of Terms Used in MX301 and MX301-M Documentation
Hardware Item (as displayed in the CLI)	Description	Value (as displayed in the CLI)	Item in Documentation	Additional Information
Chassis	–	–	Device chassis	MX301 and MX301-M Chassis
Routing Engine 0	–	–	Routing Engine (built-in)	–
CB 0	Abbreviated name for Control Board	–	Control board (built-in)	–
FPC 0	Abbreviated name for Flexible PIC Concentrator	–	MPC (built-in)	Understanding Interface Naming Conventions
PIC 0	Abbreviated name for Physical Interface Card	–	Linecard MIC (built-in)	–
Xcvr n	Abbreviated name for a transceiver	`n` is a value equivalent to the number of the port in which the transceiver is installed.	Optical transceiver	Hardware Compatibility Tool
PEM n	JPSU-850W-AC-AFO JPSU-850W-DC-AFO JPSU-850W-HV-AFO	`n` is 0 or 1. The value corresponds to the power supply slot number.	AC, DC, or HVAC/DC power supply	MX301 and MX301-M Power System
Fan Tray n	JNP-FAN3-1RU	`n` is a value in the range of 0–5. The value corresponds to the fan module slot number.	Fan module	MX301 and MX301-M Cooling System