User's Manual

3-14
Cisco Catalyst 4900M S witch Inst allati on Guide
78-18350- 0 2
Chapter 3 Installing the Swi tch
Optical Connections
You should also check the chassis front pa nel LEDs:
• The PS1 or PS2 LED is green.
• The PS1 or PS2 LED is red when the power supply is not functioning normally.
• The PS1 or PS2 LED is off when the power supply is not connected to a power source.
From the system console, enter the show power command to display the power supply and system status.
For more information on this command, see the command reference publication for your software
release.
If the LEDs or show power command indicate a power problem or other sy stem prob lem, see Chap te r 4,
“Troubleshooting the Installation,” for troubleshooting information.
Optical Connections
The Cisco 4900M switc h has up to 24 ports th at can be configured with X2 modul es with SC c onnectors .
Module types supported are doc umented at:
http://www. cisco. com/e n/US/ docs/i nterf aces_m odul es/tran sceiver _modu les/c ompati bility/matrix/OL_
6974.html
Generic connection instructions for the X2 modules are at:
http://www. cisco. com/e n/US/ docs/i nterf aces_m odul es/tran sceiver _modu les/ins tall ation/ note/ OL_235 8
9.html
Installation documentation for Cisco TwinGig converter modules can be found at:
http://www. cisco. com/e n/US/ docs/s witche s/la n/cata lyst375 0e_ 3560e/h ardwar e/in stall/n otes /17572 02.h
tml
Configurable M odules
All Catalyst 4900M modules support hot sw apping, which lets you inst all, remove, repla ce, and
rearrange switching modules without turning off the system power. When the system detects that a
switching module has been ins talled or removed, it runs diagnostic and discovery t ests automatically,
acknowledges the presence or a bsence of the module, and r esumes system operati on with no operator
intervention.
This section describes the following topics:
• Required Tools, pag e 3-15
• Removing Switching Modules, page 3-15
• Installing Switching Modu les, page 3-17