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Chapter 9
Switch Operating Procedures
Deleting a Configured Bit Error Rate Test
There are two ways to terminate a configured BERT.
1.
2.
Managing PXM1E and AXSM Card Diagnostics
Diagnostics tests run on all the major hardware components that belong to the PXM1E or AXSM front
card and its lower back cards, and the connection path between these components. You can configure a
hardware-oriented test to check the health of the active and standby PXM1E or AXSM front card. Tests
can be run on the standby card, the active card, or both cards at the same time.
PXM1E and AXSM cards support both online and offline diagnostics.
•
Note
•
AXSM cards run offline diagnostics in the following areas:
•
•
PXM1E cards run registered offline diagnostics on UI- S3 or UI-S3/B back cards.
Both control path and data path must to be tested in order to have complete test coverage on the entire
connection path within a card. The control path is the path that carries IPC messages between cards. The
diagnostic data path is the path for cells travelling between the backplane and the loop back device.
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
Enter the delbert <SM Interface> command. Replace <SM Interface> with the service module
interface number in the format slot.line.port. In the following example, the user deletes BERT from
line 1 on port 2 in the PXM1E in slot 7.
Unknown.7.PXM.a > delbert 7.1.1
Enter the cnfbert command with the -en option disabled. (See
cnfbert command parameters.)
Unknown.7.PXM.a > cnfbert -cbif 25.1.0 -pat 1 -lpbk 14 -en 6
Online diagnostics tests run in the background while a card is in an operational state. These tests are
non-intrusive and run with minimal overhead. Online diagnostics can be used to detect hardware
errors. The goal is to monitor any potential errors at a card level while a card is in normal operation.
You can stop a test by issuing a new diagnostic configuration to disable it. If the online diagnostics
test fails on an active AXSM, a switchover is triggered, the active card becomes the standby, and an
error message appears declaring that the standby card as failed. If the online diagnostics test fails on
an active PXM1E, no switchover is triggered.
Online diagnostics do not detect operational errors.
Off-line diagnostics ensure the standby card is ready to be switched over to. Offline diagnostics tests
are performed only on the standby card. Areas for diagnosis include hardware components and cell
paths. Off-line diagnostics are destructive. Intensive tests are performed on a card including memory
tests and registers read/write tests. It temporarily puts a standby card out of service and makes it
unavailable to be switched over to in case of active card failure. When tests are done, the card is reset
to its normal state. If the active card fails while the standby card is running off-line diagnostics,
off-line diagnostics are immediately aborted
Processor subsystem: NVRAM and BRAM
ASIC tests: Atlas (register test, ingress memory, egress memory) and framer (register test)
Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Managing PXM1E and AXSM Card Diagnostics
Table 9-34
for a description of the
9-83
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Troubleshooting
