Cisco Systems OL-7861-01 manual Alphanumeric LEDs, Color/Activity, Description

Verifying and Troubleshooting the Installation

Table 17 Status LED Descriptions

LED	Color/Activity	Description
LINK	Green	• A signal is detected.
		• There is RX synchronization.
		• The GBIC or SFP module is inserted and has no fault conditions.
		• The line card is connected to another functioning Gigabit Ethernet interface
		and has received comma-detect characters.
	Off	• Loss of signal (LOS). Occurs when the signal is lost at the optical input. For
		example, removing a GBIC or SFP or removing a cable causes both an LOS
		and a loss of synchronization.
		• Loss of RX synchronization. Occurs when the receiver cannot detect
		commas. For example, removing the local RX cable or the remote TX cable
		will cause loss of synchronization.
		• Invalid word received. To maintain receiver alignment and synchronization,
		the receiver looks for a unique detectable code-bit pattern. An invalid word
		condition occurs because the receiver detects an incorrect or unsupported
		character or sequence of characters, resulting in a loss of synchronization
		and a link down condition.
ACTIVE	Green	• When the line protocol is up. For example, you enter a no shutdown
		command as part of the interface configuration.
		• During the line card hardware initialization sequence.
	Off	• The line is down because of a link failure or problem with the GBIC or SFP
		module.
		• Hardware initialization fails.
		• The line card interface is shut down, because a GBIC or SFP module was
		removed and replaced or was administratively shut down. Note that a newly
		inserted line card is designated administratively down, so the Active LED for
		the interface remains off until the interface is configured. The Active LED on
		the line card does not go on until you configure the line card interface (or turn
		the interface on if it was shut down). As an operational check, you can verify
		that the card is receiving power by looking at the alphanumeric display
		LEDs, which go on when a line card is inserted correctly into the chassis and
		is powered on.
RX FRAME	Green	Packets are being received on this interface.
	Off	Packets are not being received on this interface.

Alphanumeric LEDs

Ethernet line cards have two four-digit alphanumeric LED displays at one end of the faceplate, near the ejector lever, that display a sequence of messages indicating the state of the card. In general, the LEDs do not turn on until the RP recognizes and powers up the card. As it boots, the line card displays a sequence of messages similar to those in Table 18.

Note It is normal for some displayed messages to appear too briefly to be read. Also, some messages listed in Table 18 and Table 19 may not appear on your line card.

Cisco XR 12000 Series Router Ethernet Line Card Installation

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