ACX7509 Forwarding Engine Board

The ACX7509 router supports two ACX7509-FEB Forwarding Engine Boards (FEBs). You install FEBs horizontally, mid-chassis, between the Flexible PIC Concentrators (FPCs) and the Routing and Control Boards (RCBs) in the front and the fan trays in the rear. FEBs are hot-removable and hot-insertable field-replaceable units (FRUs) that are not visible from the outside of the router chassis. You must remove one of the fan trays to see the FEBs.

FEBs receive signals from the midplane of the chassis and process these signals for packet forwarding. The midplane allows any FEB to carry traffic for any FPC.

The ACX7509-FEB design employs two forwarding ASIC's for packet processing and traffic management. Each forwarding ASIC support 2.4Tbps throughput. The ACX7509-FEB support 4.8Tbps throughput, with over subscription upto 6.2Tbps.

Figure 1: ACX7509-FEB

Table 1: ACX7509-FEB Specifications
Specification	ACX7509-FEB
Software release	Junos OS Evolved 21.4R1
Supported FPCs	JNP-FPC-4CD JNP-FPC-16C JNP-FPC-20Y
Number of FEBs required for operation	ACX7509-BASE systems: one FEB ACX7509-PREMIUM systems: two FEBs
Height	19.7 in. (50.04 cm)
Width	1.8 in. (4.57 cm)
Depth	10.4 in. (26.42 cm)
Weight	14.8 lb (6.71 kg)
Power requirement	With 50% load at 25°C (Typical) - 356W With 100% load at 55°C (Maximum) - 468W

ACX7509-FEB LEDs

The Forwarding Engine Boards (FEBs) have two status LEDs. See Figure 2.

Figure 2: FEBs LEDs

1 — Online/Offline button	3 — STS FEB status LED
2 — PWR status LED

Table 2 describes the functions of FEB LEDs and the Online/Offline button.

Table 2: FEB LEDs and Online/Offline Button
Label	Color	State	Description
PWR (Power)	Green	On steadily	The FEB is receiving power.
	Yellow	On steadily	The FEB is receiving power but a power fault occurred.
	Dark	Off	The FEB is either offline or not receiving power.
STS (Status)	Green	On steadily	The FEB is online and functioning normally.
	Green	Blinking	The FEB is booting or going offline.
	Yellow	On steadily	The FEB has failed.
	Dark	Off	The FEB is offline.
Online/Offline button	-	-	You can use this button to power on/off the FPC.