Installation guide

Chapter 2 Product Overview
Front-Panel Description
2-12
Catalyst 3550 Multilayer Switch Hardware Installation Guide
78-11358-06
Bandwidth Utilization
The UTIL mode on the switch shows the current bandwidth in use by the switch.
(See Figure 2-4 to Figure 2-8.) If all possible port LEDs are green, bandwidth
utilization is in the 50 to 100 percent range. Every port LED that is off (black)
divides this range by two.
Note The port LEDs on the Catalyst 3550-24PWR switch do not show bandwidth
utilization.
SPEED
10/100 and 10/100/1000 ports
Off Port is operating at 10 Mbps.
Green Port is operating at 100 Mbps.
Blinking green Port is operating at 1000 Mbps.
GBIC ports
Off Port is not operating.
Blinking green Port is operating at 1000 Mbps.
LINE PWR
2
Off Inline power is off.
Green Inline power is on.
If the Cisco IP Phone is receiving power from an AC power source,
the port LED is off even if the IP phone is connected to the switch
port. The LED turns green only when the switch port is providing
power.
1. Not available on Catalyst 3550-24PWR switches
2. Available only on Catalyst 3550-24PWR switches
Table 2-5 Meaning of LED Colors in Different Modes (continued)
Port Mode LED Color Meaning