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Catalyst 2970 Switch Hardware Installation Guide
OL-6422-01
Chapter 1 Product Overview
Front Panel Description
Table 1-3
Port Mode LEDs
Mode LED
Port Mode
Description
STAT
Port status
The port status. This is the default mode.
DUPLX
Port duplex mode
The port duplex mode: full duplex or half duplex.
SPEED
Port speed
The port operating speed: 10, 100, or 1000 Mbps.
Table 1-4
Meaning of LED Colors in Different Modes on the Switch
Port Mode
LED Color
Meaning
STAT
(port status)
Off
No link, or port was administratively shut down.
Green
Link present.
Blinking green
Activity. Port is transmitting or receiving data.
Alternating
green-amber
Link fault. Error frames can affect connectivity, and errors such as
excessive collisions, CRC errors, and alignment and jabber errors
are monitored for a link-fault indication.
Amber
Port is blocked by Spanning Tree Protocol (STP) and is not
forwarding data.
Note
After a port is reconfigured, the port LED can remain amber
for up to 30 seconds as STP checks the switch for possible
loops.
Blinking amber Port is blocked by STP and is transmitting or receiving packets.
DUPLX
(duplex)
Off
Port is operating in half duplex.
Green
Port is operating in full duplex.
Summary of Contents for 2970 - Catalyst Switch
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