Product Details

Figure 2 shows the front panel of the Cisco 2921 router.

Note:
①AC OK  ②On/Off switch  ③AC power connector  ④Optional RPS adapter(blank panel shown)  ⑤LEDs area


Table 2 shows the LEDs area description.

LED	Color	Description
SYS	Solid green	Solid green indicates normal operation.
	Blinking green	System is booting or is in ROM monitor mode.
	Amber	System error.
	Off	Power is off or system board is faulty.
ACT	Green	Solid or blinking indicates packet activity between the forwarding and routing engine and any I/O port.
	Off	No packet transfers are occurring.
PoE	Green	PoE is available.
	Amber	Power supply is not supplying PoE power.
RPS	Green	System is running on external RPS power supply.
PS	Green	System is running.
	Amber	System is not running.

Figure 3 shows some LEDs on the back panel of the Cisco 2921 router.

Note:
 ① Compact flash 0 and 1 (0, right)  ② ISM    ③ PVDM3 0,1 and 2 (0 right)  ④ EN (Enable USB console) ⑤ EN (Enable RJ-45 console)  
⑥ SFP S  ⑦ SFP EN  ⑧ S (Speed)  ⑨ L (Link)

Table 3 shows the description of these LEDs on the back panel.

LED	Color	Description	Location
CompactFlash 1	Green	Flash memory is busy.	Back Panel
	Amber	Initialized with error.
	Blinking Green then turns off	CompactFlash is ready for removal.
CompactFlash 0	Green	Flash memory is busy.	Back Panel
	Amber	Initialized with error.
	Blinking Green then turns off	CompactFlash is ready for removal.
S (Speed)	1 blink + pause	GE port operating at 10 Mb/s.	Back Panel
	2 blink + pause	GE port operating at 100 Mb/s.
	3 blink + pause	GE port operating at 1000 Mb/s.
L (Link)	Green	GE link is established.	Back Panel
	Off	No GE link is established.
EN (RJ-45 console port)	Green	The RJ-45 console port is active.	Back Panel
EN (USB serial console port)	Green	The USB console port is active.	Back Panel
ISM	Green	Initialized.	Back Panel
	Amber	Initialized with error.
	Off	Not installed.
SFP S	Blinking green	Blinking frequency indicates port speed.	Back Panel
SFP EN	Off	Not present.	Back Panel
	Green	Present and enabled.
	Amber	Present with failure.
PVDM 0, 1 and 2	Green	PVDM is initialized.	Back Panel
	Amber	PVDM is detected but not initialized.
	Off	No PVDM installed.

Figure 4 show the expansion slots and ports on the back panel.
The Cisco 2921/K9 supports expansion functions with modules and cards.

Note:
① Compact flash 0 and 1 (0, right)         ② EHWIC 0,1,2 and 3 (0, far right)        ③ USB serial port 
④ RJ-45 serial console port                    ⑤ AUX port                                                ⑥ SFP
⑦ 10/100/1000 Ethernet port (GE 0/1 and GE 0/2)                                                  ⑧ 10/100/1000 Ethernet port GE 0/0    
⑨ Ground                                                    ⑩ USB 0 and 1 (1, top)                           ⑪ Service module slots