10-13
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
Warning
Ensure that the new back cards are firmly screwed into the chassis by gently tugging on
them. If one of the standby back cards feels loose, or if the standby back cards are seated
slightly higher or lower in the chassis than the active back cards, the new back cards may
not be seated properly.
Step 16
Remove any Y-cables and straight cables connected to the removed standby PXM1E-4-155 back card. If
there were no cables attached to the removed standby PXM1E-4-155 back card, proceed to
Step 17
Replace SC cables that will be connected to the FRUs in the installed PXM1E-8-155 card with
SC-conversion cables. Connect one end of the LC cable to the appropriate FRU on the installed
PXM1E-8-155 card. Connect the far end of the LC cable to an SC conversion cable as described in the
“Replacing PXM1E SC Cables with LC Cables via SC Conversion Cables”
section later in this chapter
Note
SC conversion cables are required for graceful upgrades.
Step 18
Enter the dspcds command and verify that the standby PXM1E-8-155 comes up in the standby-ready
state.
Step 19
At the active PXM1E-8-155, enter the commithw <Slot Number> 1 command to commit the hardware
upgrade on the switch. Replace <Slot Number> with the slot number for the active PXM1E-8-155 card.
In a Cisco MGX 8850 (PXM1E) switch, the <Slot Number> parameter can be 7 or 8. In a Cisco MGX
8830 switch, the <Slot Number> parameter can be 1 or 2. The number 1 specifies that this card has been
upgraded from a PXM1E-4-155 to a PXM1E-8-155.
In the following example, the user commits the hardware upgrade on the PXM1E-8-155 in slot 2 of an
MGX 8830 switch.
pxm1e.2.PXM.a >
commithw
2 1
Step 20
Enter the dspcd <slotnumber> command to verify that the reserved front card is a PXM1E-8-155.
Replace <slotnumber> with the slot number of the active PXM1E card.
Step 21
If you have APS lines on the installed PXM1E-8-155 card, enter the dspaps command to verify that the
APS lines are OK and clear of alarms.
Non-gracefully Upgrading a Single PXM1E-4-155 to a PXM1E-8-155
A nongraceful upgrade is a software or hardware upgrade that interrupts some or all established calls.
When you perform a nongraceful PXM1E upgrade, all calls are interrupted. To non-gracefully replace a
single PXM1E-4-155 to a PXM1E-8-155, use the following procedure:
Step 1
Enter the dspcds command to verify that the current PXM1E-4-155 card is running Release 4 or later.
If the card is running a release that is prior to Release 4, you need upgrade the entire switch to Release
4 or later as described in
Appendix A, “Downloading and Installing Software Upgrades.”
Step 2
Enter the saveallcnf command to save the existing configuration on the current PXM1E-4-155 card, and
FTP that configuration file to a remote location. This ensures that you will be able to go back to your old
switch configuration if you need to.
Step 3
Physically remove the PXM1E-4-155 card set (front and back cards) from the switch on which you are
performing the upgrade, and replace it with the PXM1E-8-155 card set.
