Cisco Cisco XR 12000 12000 1-Port OC-48c STM-16c POS SDH ISE Line Card

The fiber-optic connectors must be free of dust, oil, or other contaminants. Carefully clean the fiber- 
optic connectors using an alcohol wipe or other suitable cleanser. 

The following sections describe how to verify and troubleshoot line card installation:

Many new line cards are designated as administratively down by default. Status LEDs are off until you 
configure the interfaces and use the no shutdown command.

During a typical line card boot process, the following events occur:

The line card maintenance bus (MBus) module receives power and begins executing the MBus 
software.

The line card MBus module determines the type of card on which it resides, performs internal 
checks, and prepares to accept the Cisco IOS software from the RP.

The RP powers up the line card and loads the line card with its Cisco IOS software.

To verify that the line card is working properly, perform the following operational checks:

During the line card boot process, observe the line card alphanumeric LEDs to ensure that the card 
is running the typical initialization sequence. The sequence should end with IOS RUN.

Observe the line card status LEDs to verify that the Active LED (Link LED or status LED for line 
cards with no Active LED) is on. If an Active LED is not on, verify that the associated interface is 
not shut down.

 

If one of these conditions is not met, refer to the 

 to identify any possible problems.

POS 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 24

.