Cisco 2955 Installation Guide download pdf (Page 58)

Chapter 2 Overview

Front-Panel Description

2-14

Catalyst 2955 Hardware Installation Guide

78-14944-03

Uplink Port Status LEDs

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 Figure 2-8). On the

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, Table 2-4, and Table 2-5.

Note 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 for

more information about uplink port LED colors during POST.

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

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.

Solid amber Port is not forwarding. Port was disabled by management, an

address violation, or Spanning Tree Protocol (STP).

Note 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 2-3 10/100/1000BASE-T Uplink Port Status LEDs

Color System Status

Off No link.

Solid green Link is present.

1 2 ... 53 54 55 56 57 58 59 60 61 62 63 ... 297 298

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Cisco 2955 Installation Guide Page 58