10-9
Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
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.”
Hard disk card
non-native
No active card set. Secondary
card set
is active.
No active card set.
No active card set.
No active card set.
Both cards
non-native,
mismatched serial
numbers
No active card set. Secondary
card set
is active.
No active card set.
No active card set.
No active card set.
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.
Table 10-2
Mastership Assignment to PXM Card Sets after Nativity Check (continued)
Primary Slot
1
Secondary Slot
2
Nativity Status
Both cards
non-native
Front card
non-native
Both cards
non-native,
matched serial
numbers
Hard disk card
non-native
Both cards
non-native,
mismatched serial
numbers
