Cisco Systems Cisco uBR10012 manual Symptom Possible Cause Corrective Action

Chapter 4 Troubleshooting the Installation

Troubleshooting the HHGE Installation

Table 4-2	Line Card Installation Troubleshooting (continued)
Symptom		Possible Cause		Corrective Action
The yellow FAIL LED blinks		1.	The SFP GBIC has been rejected	1.	Replace with a Cisco SFP GBIC.
			because:
			– An internal fault is detected.
			– Not a Gigabit Ethernet SFP.
			– Not a Cisco SFP.
			– Two SFPs with identical
			serial numbers are present in
			the system.
			– There is a hardware shut down
The green LINK LED does not light		1.	No Ethernet connection to	1.	Make sure the upstream device has an
when you plug in the Ethernet cable			upstream device.		active Ethernet connection.
		2.	The SFP GBIC was not fully	2.	Reinstall the SFP GBIC.
			inserted or seated properly.
		3.	Negotiation is not configured	3.	Reconfigure negotiation.
			properly.
		4.	Hardware shut down for that port.	4.	Enable the port.
		5.	Improper SFP GBIC (FAIL LED	5.	Replace with a Cisco SFP GBIC.
			should blink).	6.	Replace the cable.
		6.	Bad cable.
The green LINK LED is on, but does		1.	Negotiation is off, but set to on at	1.	Set local and remote negotiation settings
not pass traffic			the remote end.		to the same value.
		2.	Internal loopback is enabled.	2.	Disable loopback.
				3.	ARP incomplete
				4.	IP address not configured

	Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
4-14	OL-18259-01