Specifications

10-11
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
Gracefully Replacing a Redundant PXM1E-4-155 Card Set with a Redundant PXM1E-8-155 Card Set
A graceful upgrade is an upgrade that upgrades hardware or software without interrupting established
calls. The following conditions must be met before you can gracefully upgrade to a PXM1E-8-155 card
set:
• The PXM1E-4-155 is running Release 4.0 or later.
• Intercard APS is configured on the PXM1E-4-155 card set you want to replace. This means that an
APS connector is installed on the PXM1E-4-155 back cards. If an APS mini-backplane has not been
installed, you need to install it on the PXM1E-4-155 back cards before proceeding with the upgrade.
• If you are installing SFP-8-155 back cards, you have the proper number of LC-to-SC conversion
cables. Without LC-to-SC conversion cables, traffic will be interrupted.
Use the following procedure to gracefully replace a redundant PXM1E-4-155 card set with a redundant
PXM1E-8-155 card set.
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 to 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 Ensure that the active PXM1E-4-155 back card is firmly screwed into the chassis by gently tugging on
the back card. If the card feels loose, or if one back card is seated slightly higher or lower in the chassis
than the other back card, one of the cards may not be seated properly.
Warning It is imperative that the active back cards are firmly screwed in and seated properly in the
chassis before you remove the standby card set. If the active back cards are even slightly
misaligned, traffic may be lost or interrupted during card replacement.
Step 4 Physically remove the standby PXM1E-4-155 card set (front and back cards) from the switch on which
you are performing the upgrade.
Step 5 If you are installing an SFP-8-155 back card, insert FRU connectors into the appropriate ports on the
back card before installing new card set into the switch.
If you are installing an MCC-8-155 back card, skip Step 5 and move on to Step 6.
Note Cisco recommends that you install FRUs on the PXM1E-8-155 ports that correspond to the
configured ports on the removed standby PXM1E-4-155 back card. For example, if you had a
physical SC line connected to port 1 on the removed standby PXM1E-4-155 back card, you need
to install a FRU on port 1 of the installed SFP-8-155 back card.
Step 6 Insert the PXM1E-8-155 card set into the appropriate slots. Insert the front card first; then insert the back
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.