Specifications

10-9
Cisco MGX 8800/8900 Series Software Configuration Guide
Release 5.1, Part Number OL-6482-01, Rev. A0, January 25, 2005
Chapter 10 Switch Maintenance Procedures
Replacing Cards
Manually Responding to Nativity Checks
When a switch cannot automatically resolve a nativity check conflict, the first step to resolution is to use
the switch to tell determine the source of the problem and a possible recovery method.
For releases prior to 3.0(20), enter the sh command to enter shell mode, and then enter the shmFailHelp
command to determine the problem. After you discover the problem, enter the shmFailRecoveryHelp
command to display recommended solutions for problems. For many situations, the
shmFailRecoveryHelp command will recommend a response. For example, the shmFailRecoveryHelp
command might recommend that you enter the shmRecoverIgRbldDisk command to ignore the nativity
check and configure the entire switch using the configuration on the hard disk.
For release 3.0(20) and later, enter the dspcdhealth command to see the failure reason and a
recommended recovery method. The following example shows the format of this command display:
M8850_LA.8.PXM.a > dspcdhealth
* PXM Failed for the following reasons:
* Fail Recovery
* Reason Method
* ====== =================
Some typical responses to nativity check conflicts include:
• If you saved a configuration with the saveallcnf command, you can restore the configuration with
the restoreallcnf command.
• If there is no configuration available, you can enter a clrallcnf command to establish the PXM card
sets as new, unconfigured cards in the chassis.
• If a configuration exists on a PXM45 hard drive card, you can use that configuration to configure
the front card and establish nativity for the card set.
If the switch cannot resolve a nativity check conflict and all the cards are operating properly, the PXM
cards enter stage 1 CLI mode, which offers a reduced set of commands that you can use to resolve the
conflict.
When operating in stage 1 CLI mode, you can FTP files to the switch in preparation for a new
configuration or a configuration restore. You can FTP files to the switch using the procedures described
for copying files to the switch in Appendix A, “Downloading and Installing Software Upgrades.”
To rebuild the configuration from a configured PXM45 hard disk card in the switch, do the following
tasks:
• Clear the configuration (clrallcnf) on the PXM45 front card using a PXM hard disk card for which
the configuration can be erased. (Do not use the PXM45 slot that hosts the configuration you want
to use.)
• Install the unconfigured PXM45 front card and the configured PXM45 hard disk card in a chassis
without a redundant card set.
The switch will build the PXM45 front card configuration from the configuration on the hard disk.
Replacing PXM1E-4-155 Cards with PXM1E-8-155 Cards
The PXM1E-8-155 card set consists of a a front card, a UI-S3/B back card, and one of two back cards:
1. The primary PXM slot is Slot 1 on MGX 8830 switches, Slot 7 on MGX 8850 and MGX 8950 switches, and slot 7 on the MGX 8880 Media Gateway.
2. The secondary PXM slot is Slot 2 on MGX 8830 switches, Slot 8 on MGX 8850 and MGX 8950 switches, and slot 8 on the MGX 8880 Media Gateway.