Cnfdiag - Cisco MGX 8850 Command Reference Manual

Chapter 9 Troubleshooting Commands

cnfdiag

Configure Diagnostics
Enables the online or offline diagnostics. The cnfdiag command also configures the time settings for the
start time and coverage for running the offline diagnostics. When you enter cnfdiag with no parameters,
it displays the current configuration and status of the diagnostics.
The cnfdiagall command is the same as cnfdiag except that it configures all slots on the card at once.
The Purpose of the MGX 8850 Diagnostics
MGX 8850 diagnostics were implemented to test and validate the communication paths on the controller
(PXM45) and the service modules (AXSM) to ensure reliability before and during operation. The
diagnostics are always scheduled from the PXM45 controller card whether or not they run on the PXM45
card or the AXSM card.
For backward compatibility, the MGX 8850 Release 2.1 switch has two buses on its backplane:
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•
Because of the difference in bus speeds on the backplane, the Reliability Availability Serviceability
(RAS) requirements demand that diagnostics be run periodically on the communications paths.
Consequently, diagnostics should be running periodically on both active and standby cards, but
especially on standby cards. It is important that standby cards are tested using diagnostics periodically
and frequently so that when an active card fails, the standby card has been tested and is ready to assume
the active card state immediately.
Online Diagnostics
Online diagnostics are nondestructive tests (that do not interfere with active traffic) and run on either
active and standby cards. The MGX 8850 switch supports seven online diagnostics tests. Three tests run
on the PXM45 card, and four tests run on the AXSM card.
PXM45 Online Diagnostics
Active State
When you enable online diagnostics on an active PXM45 card, the following test runs:
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Standby State
When you enable online diagnostics on a standby PXM45 card, the following tests run:
•
•
AXSM Online Diagnostics
Active State
When you enable online diagnostics on an active AXSM card, the following test runs:
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Release 2.0, Part Number 78-10467-04 Rev C0, October 2001
A 1.2 Gbps Cellbus
A 45 Gbps MGX 8850 Release 2.1 bus
Crossbar loopback test on QE1210, Humvee, and Crossbar paths
Framer loopback test on QE1210, ATLAS, and OC-3 Framer paths
Crossbar loopback walk test on QE1210, Humvee, and Crossbar paths
Crossbar loopback test on QE, Humvee, and Crossbar paths
Cisco MGX 8850 Routing Switch Command Reference
cnfdiag
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