Uplink Port Status Leds - Cisco Catalyst 2955 Hardware Installation Manual
Cisco systems switch installation guide
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Front-Panel Description
Uplink Port Status LEDs
Note
Catalyst 2955 Hardware Installation Guide
2-14
Table 2-2
10/100 Port Status LEDs
Color
System Status
Off
No link.
Solid green
Link present.
Flashing green Activity. Port is transmitting or receiving data.
Alternating
Link fault. Error frames can affect connectivity, and errors
green-amber
such as excessive collisions, CRC errors, and alignment and
jabber errors are monitored for a link-fault indication.
Solid amber
Port is not forwarding. Port was disabled by management, an
address violation, or Spanning Tree Protocol (STP).
Note
The Catalyst 2955 switch has two uplink port status LEDs to the right of the port
status LEDs. On the Catalyst 2955C-12 and 2955S-12 switches, the fiber-optic
uplink port status LEDs are labeled 13 and 14 (see
Catalyst 2955T-12, the 10/100/1000BASE-T uplink ports are labeled 1 and 2 (see
Figure
2-7).
These LEDs display information about the switch and the individual uplink ports,
as shown in
Table
2-3,
The uplink port status LEDs provide system and status information during POST.
See the
"Powering On the Switch and Running POST" section on page 3-13
more information about uplink port LED colors during POST.
Table 2-3
10/100/1000BASE-T Uplink Port Status LEDs
Color
System Status
Off
No link.
Solid green
Link is present.
After a port is reconfigured, the port LED can remain
amber for up to 30 seconds while STP checks the
switch for possible loops.
Table
2-4, and
Table
2-5.
Chapter 2
Overview
Figure
2-8). On the
78-14944-03
for
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