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LED Identification

Most modules have two sets of status LEDs. The top set indicates basic functional status of the router or module. The bottom set indicates system status for that module, such as port status (line modules and IOAs) or fan status (SRP modules). See Figure 32 and Figure 33 for LED locations and labeling. See Table 11 for descriptions of LED activity for all modules and IOAs.

Figure 32: Typical IOA LEDs

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Figure 33: SRP IOA Module LEDs

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Note: The primary SRP module illuminates the REDUNDANT LED when the SRP module is part of a redundancy group and it is up and running (or ready to take over). The standby SRP module monitors an activity signal from the primary SRP module to determine its state; it does not shadow the operations of the primary SRP module. If the standby SRP module detects that the primary SRP module is not active (and high-availability mode is not enabled), it reboots the system and takes control. If high-availability mode has been enabled, automatic switchover occurs with near hitless failover.

Table 11: LED Identification and Activity Descriptions

LED Location	LED Label	LED Indicator	LED Color	OFF to ON	ON to OFF
All modules
	OK	Module status	Green	Self-test passed	Failure detected
	FAIL	Module status	Red	Failure detected	Diagnostic test running
	ONLINE	Module status	Green	Module online	Module offline
Line module
	REDUN	Redundancy	Green	Module is active, and a standby module is available	Module is active, and no standby module is available
SFM module
	REDUN	Redundancy	Green	N+1 redundancy is enabled; 2 SRPs and 3 SFMs must be installed and working. When LED is lit, you can remove the module without interrupting service.	One of the five fabric slices is down or not installed. N+1 redundancy is not enabled.
SRP module
	REDUN	Redundancy	Green	Module is the spare system controller, is up, and is ready to take the role of the online system controller.	Module is no longer acting as the spare system controller.
	PA	Power A	Green	Power is online on source A.	Power is off.
	PB	Power B	Green	Power is online on source B.	Power is off.
	FO	Fan online	Green	Fan is online.	Critical fan failure.
	FF	Fan failure	Red	Critical fan failure.	Fan is online.
		NOTE: You can run the show environment command to see whether a noncritical fan failure exists.
	LK	Ethernet link	Green	Ethernet link is up.	Ethernet link is down.
	AC	Ethernet activity	Green	Blinks when Ethernet traffic is on link.	No Ethernet traffic is on link.
IOAs		NOTE: Not all IOAs have the following LEDs.
	ALM	Port status	Yellow	The remote end of the link is experiencing loss of signal (FERF).	No FERF present, port is working correctly.
		Port status	Red	Port is experiencing loss of signal.	Port is working correctly; in sync.
	OK	Port status		Physical link is connected properly and is functioning properly.	Physical link is not connected properly and is not functioning properly.

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