Cisco MGX 8950 Specifications Page 470

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10-10
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
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:
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 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco
MGX 8880 Hardware Installation Guide, Releases 2 Through 5.
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
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