Repair and Replacement 11-5
Replacing Parts
Replacing Parts
After an alarm occurs, use the BPX switch software to isolate the problem. If an BPX switch part
has failed, then it must be replaced.
Caution Only authorized personnel should remove and replace parts on the BPX switch system.
Parts should be replaced only by qualified personnel who have taken the Cisco training courses or
been trained by a qualified system manager. For assistance in diagnosing or replacing a failed part,
call Customer Service.
When replacing a part, save the electrostatic bag, foam, and carton that the new part comes in. These
packaging materials are needed for returning the failed part to Cisco. Contact Customer Service for
information on returning parts.
Replacing a Front Card
The BPX switch front cards are as follows:
• Broadband Controller Card (BCC)
• BXM-T3/E3, BXM-155, BXM-622
• Broadband Network Interface Card (BNI)
• Alarm and Status Monitor (ASM)
• Access Service Interface (ASI-1)
Caution Ground yourself before handling BPX switch cards by placing a wrist strap on your wrist and
clipping the wrist strap lead to the cabinet.
When a card has failed, the red FAIL indicator for that card turns on. Before replacing it, check to
see if the card only needs to be reseated. After reseating the card, wait for it to run its self-tests to
see if the ACTIVE light comes on. If the card is seated correctly, but the FAIL light is still on, replace
the card.
To remove a front card, perform the following steps:
Step 1 If the front panel fail lamp is on, remove the card and go to Step 3. Otherwise, go to
Step 2.
Step 2 Check the status of the card using the dspcd or dspcds commands. It should be failed or
standby if the node is actively carrying traffic.
Step 3 If an active card (ASI, BNI) needs to be replaced, “down” it first with the dncd command.
Removing an active card affects operation only slightly if there is a standby card.
Step 4 If a BCC has failed, the other BCC will switch from standby mode to active. Use the
dspcd command to verify that the standby BCC has entered the active mode. Then you
can remove the failed BCC.
Caution Never remove the active BCC until the standby BCC has entered the “active” mode. Using the
dspcd command is the only reliable way to determine that the standby BCC has finished updating and has
entered the “active” mode.
