Cisco Systems Catalyst 2955 manual Uplink Port Status LEDs

Chapter 2 Overview

Front-Panel Description

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 After a port is reconfigured, the port LED can remain
		amber for up to 30 seconds while STP checks the
		switch for possible loops.

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 3-13for 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.
	Catalyst 2955 Hardware Installation Guide
2-14			78-14944-03