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CHAPTER
4-1
Cisco MGX 8950 Hardware Installation Guide
Release 3, Part Number 78-14147-02 Rev. A0, November 2002
4
Maintaining the Cisco MGX 8950 Switch
This chapter provides maintenance procedures for the Cisco MGX 8950 switch. It contains the
following
sections:
• Swap a Primary or Redundant DC PEM with Power On, page 4-1
• Remove and Install the Double-Height Front Cards, page 4-4
• Remove and Install the Single-Height Front Cards, page 4-7
• Remove and Install the Back Cards, page 4-8
• Remove the Center Guide Modules, page 4-11
• Connect the Back Cards to the APS Connector, page 4-14
• Install the APS Assembly into the Switch, page 4-16
• Remove the Back Cards from an APS Assembly, page 4-16
Warning
Only trained and qualified personnel should be allowed to install or replace this equipment.
Warning
This unit is intended for installation in restricted access areas. A restricted access area is where
access can only be gained by service personnel through the use of a special tool, lock and key, or
other means of security, and is controlled by the authority responsible for the location.
Swap a Primary or Redundant DC PEM with Power On
If necessary, you can replace either a primary or a redundant DC PEM with power on. To avoid possibly
tripping the system circuit breaker in the process, complete the following steps to swap a primary or
redundant DC PEM with the system powered:
Caution Do not use a power screwdriver on captive screws.
Warning
Before working on a chassis or working near power supplies, unplug the power cord on AC units;
disconnect the power at the circuit breaker on DC units.