Cisco 10000 Series Router Troubleshooting Guide
Troubleshooting Line Cards
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Troubleshooting Line Cards

Table Of Contents

Troubleshooting Line Cards

Troubleshooting the OC-12 Packet-Over-SONET Line Card

Troubleshooting the Channelized T3 Line Card

Troubleshooting the Gigabit Ethernet Line Card


Troubleshooting Line Cards


This chapter discusses troubleshooting faults on the following Cisco 10000 series router line cards:

Troubleshooting the OC-12 Packet-Over-SONET Line Card

Troubleshooting the Channelized T3 Line Card

Troubleshooting the Gigabit Ethernet Line Card

Troubleshooting the OC-12 Packet-Over-SONET Line Card

Figure 4-1 describes the LEDs on the OC-12 Packet-Over-SONET (POS) line card faceplate. Use these descriptions to verify the operation of the OC-12 POS line card.

Figure 4-1 OC-12 POS line card LEDs

Table 4-1 describes fault conditions on the OC-12 POS line card and recommended corrective actions.

Table 4-1 OC-12 POS Line Card Fault Indications and Recommended Action

Fault
Corrective Action

Fail LED is lit indicating that the line card has failed

1. Reinsert the line card.

2. Replace the line card.

3. Insert the line card in another slot.

4. Contact the Cisco TAC.

Carrier LED is off and interface is enabled

1. Check the fiber optic cable, making sure that it is properly attached at both ends.

2. Make sure that you are using the proper fiber type.

3. Check the cable connections on the remote equipment.

4. Contact the Cisco TAC.

Fail LED blinks then lights steadily repeatedly

or

Card seems to be passing traffic (Tx/Rx lights), but cannot communicate with the PRE

1. Check for bent pins on the backplane.

2. If there are no bent pins, replace with a new line card.

3. Try inserting the line card in a different slot.

If the card works in a different slot, the Cisco 10000 series router backplane may be defective. Contact the Cisco TAC.


Troubleshooting the Channelized T3 Line Card

Figure 4-2 describes the LEDs on the channelized T3 line card faceplate to help you verify proper operation.

Figure 4-2 LED States on the Channelized T3 Line Card

Table 4-2 describes fault conditions on the channelized T3 line card and lists recommended corrective actions.

Table 4-2 Channelized T3 Line Card Fault Indications and Corrective Action

Fault
Corrective Action

Fail LED is lit indicating that the line card has failed

1. Reinsert line card.

2. Replace line card.

3. Insert the line card in another slot.

4. Call the Cisco TAC.

Carrier LED is off and interface is enabled

1. Check the cables, making sure that they are properly attached at both ends.

2. Check the cable connections at the remote equipment.

3. Replace the card.

4. Try the card in a different slot. If the card works in a different slot, you may have a damaged backplane. Call the Cisco TAC.


Troubleshooting the Gigabit Ethernet Line Card

Figure 4-3 describes the LEDs on the gigabit Ethernet line card faceplate to help you verify correct operation.


Tip Make sure that the gigabit Ethernet Interface Converter (GBIC) type on the Cisco 10000 series router matches the GBIC type at the other end of the fiber optic cable.


Figure 4-3 Gigabit Ethernet Line Card Faceplate and LED Descriptions

Table 4-3 describes the gigabit Ethernet line card fault indications and suggests responses to each.

Table 4-3 Gigabit Ethernet Line Card Faults and Recommended Responses

Fault Type
Response

Fail LED is lit yellow indicating that a major fault has disabled the card

1. Reinsert the line card.

2. Insert the line card into another slot.

3. Replace the line card.

4. If neither of the above responses to a card failure succeeds, call the Cisco TAC.

Fail LED blinks then lights steadily repeatedly

or

Card seems to be passing traffic (Tx/Rx lights), but cannot communicate with the PRE

1. Check for bent pins on the backplane.

2. If there are no bent pins, replace with a new line card.

Try inserting the line card in a different slot.

If the card works in a different slot, the Cisco 10000 series router backplane may be defective. Call the Cisco TAC.

Fail LED blinks steadily

This is a user correctable problem. The steadily blinking LED indicates a transmit failure.

To correct the problem:

1. Reinsert the GBIC.

If reinsertion fails:

2. Replace the GBIC.

Link LED does not light but the port is enabled

1. Make sure the fiber optic cable is plugged in properly, unbroken, and undamaged.

2. Make sure that you are using the correct type of fiber optic cable (see Table 6-1).

3. If you have autonegotiation enabled on the local gigabit Ethernet interface, make sure that it is enabled on the remote interface also. If autonegotiation is disabled, it must be disabled at the remote interface as well.

4. Replace the GBIC.