Fan Modules; Cisco Mds 9148S Multilayer Switch Ports; Switch Leds - Cisco MDS 9100 Series Hardware Installation Manual

Fan Modules

Procedures for replacing and installing the power supplies are available in the
AC Power Supplies
Fan Modules
The Cisco MDS 9148S switch supports two hot-swappable fan modules that allow the switches to
continue to run if a fan module is removed, provided that the preset temperature thresholds have not been
exceeded. You can swap out a fan module without having to bring the system down. Each fan module on
the Cisco MDS 9148S switch has two fans.
Caution
The Cisco MDS 9148S switch has internal temperature sensors that can shut down the system if the
temperature at different points within the chassis exceed certain safety thresholds. To be effective, the
temperature sensors require the presence of airflow; therefore, in the event a fan module is removed from
the chassis, the Cisco MDS 9148S switch will shut down after five minutes to prevent potentially
undetectable overheating. However, the switches will shut down sooner if the higher-level temperature
threshold is exceeded. For normal operation, the Cisco MDS 9148S Switch requires four fans. Fan
module status is also indicated on a front panel LED.
Procedures for replacing and installing the fan modules are available in the
Modules

Cisco MDS 9148S Multilayer Switch Ports

The Cisco MDS 9148S switch provides host, target, and Inter-Switch Link (ISL) connectivity. It
provides up to 48 autosensing and autonegotiating Fibre Channel ports capable of speeds of 2-, 4-, 8-,
and 16-Gbps. The first 12 ports are licensed by default. On-Demand Port Activation Licensing allows
expansion up to 48 ports, with additional ports available as an 12-port group.

Switch LEDs

The front panel of the Cisco MDS 9148S switch includes the LEDs shown in
the LEDs on this panel to quickly identify system status.
Note
Cisco MDS 9148S switch LEDs do not indicate the port speed.
Cisco MDS 9148S Multilayer Switch Hardware Installation Guide
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section.
section.
Chapter 1 Product Overview
Removing and Installing
Removing and Installing Fan
Figure 1-3. You can use
OL-20185-01