Check the M20 Router Routing Engine LEDs

The M20 router Routing Engine LEDs and buttons are located near the middle of the craft interface above and below the Juniper Networks logo (see Figure 45).

Figure 45: M20 Router Craft Interface Routing Engine LEDs and Buttons

Table 36 describes the M20 router Routing Engine LEDs.

Table 36: M20 Router Routing Engine LEDs and Buttons

Label	Shape	Color	State	Description
MASTER		Blue	On steadily	Routing Engine is functioning as master.
ONLINE		Green	On steadily	Routing Engine has successfully booted and is running normally.
OFFLINE		Amber	On steadily	Routing Engine is not operational, or is in reset mode.
RE0, RE1		—	—	Press to take the Routing Engine offline.

You can see the Routing Engine LEDs on the craft interface or on the Routing Engine panel located on the back of the router (see Figure 46).

Figure 46: M20 Router Routing Engine Panel

Figure 37 describes the Routing Engine panel LEDs.

Table 37: Routing Engine Panel LEDs

Label	Color	State	Description
OFFLINE	Amber	On steadily	Routing Engine is not operational or is in reset mode.
ONLINE	Green	On steadily	Routing Engine is running normally.
MASTER	Blue	On steadily	Routing Engine is functioning as master.