Specifications

10-10
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
• MCC-8-155 STM1 electrical back card—.Supports APS redundancy.
• SFP-8-155 optical back card— Supports APS and Y-cable redundancy. Physical interfaces require
installation field replaceable units (FRUs).
Consider the following information when replacing an existing PXM1E-4-155 card set with a
PXM1E-8-155 card set:
• The switch must be running software Release 4.0 or later before you can replace a PXM1E-4-155
card with a PXM1E-8-155 card.
• PXM1E front and back cards can be replaced while the switch is operating.
• If a PXM1E-4-155 card set is operating in standalone mode, all calls are interrupted until the
PXM1E-4-155 card set is replaced with a fully functioning PXM1E-8-155.
• If the switch is using redundant PXM1E-4-155 card sets with an APS connector, you can upgrade
to a PXM1E-8-155 card set without interrupting traffic.
• If the switch is using redundant PXM1E-4-155 card sets without an APS connector, an upgrade to
a PXM1E-8-155 card set will interrupt traffic.
• Originally, FRUs were built into the PXM1E-4-155 cards. The PXM1E-8-155 card’s SFP-8-155
optical back card requires you to install one FRU for each physical connection on the card. For
example, if the PXM1E-4-155 card you are replacing has four connections configured, you will need
at least four FRUs in the SFP-8-155 optical back card in order to bring up the same connections on
the new PXM1E-8-155 card.
• If you want to upgrade without interrupting traffic, the FRU types must match the type of
PXM-4-155 back card you are replacing. For example, if you are replacing a SMFIR-4-OC 3 back
card that has four lines configured, you must install four SMF-IR FRUs on the SFP-8-155 back card.
For detailed information about installing FRUs on a PXM1E-8-155 card, or to see what a FRU looks
like, see the Cisco MGX 8800/8900 Hardware Installation Guide, Releases 2 - 5.1.
Note Cisco recommends that you have at least four FRUs per PXM1E-4-155 card to ensure that all
connections will be active when you replace a configured PXM1E-4-155 card with a
PXM1E-8-155 card.
• SC cables are not compatible with PXM1E-8-155 cards. Replace SC cables with the new LC cables.
Before you replace a PXM1E-4-155 with a PXM1E-8-155 card, ensure that you have the appropriate
number of LC cables required to replace all SC cables that were originally connected to the
PXM1E-4-155 card. You also need to ensure that you have the proper type of LC cable. If you will
be connecting the LC cable to an SC connector, you need an SC conversion cable that has an LC
connector on one end, and an SC connector on the other end. If you will be connecting the LC cable
to another LC connector, you need a cable with an LC connector on both ends.
For detailed information about SC and LC cables, see the Cisco MGX 8800/8900 Hardware
Installation Guide, Releases 2 - 5.1.
Note Do not do any provisioning on the switch while you are replacing the PXM1E cards.
The sections that follow provide both graceful and ungraceful upgrade procedures for PXM1E-8-155
cards.