[All About Switches - Maintenance Tips] Tips on Identifying Indicators on Fixed Switches Highlighted

Created: Apr 11, 2017 20:00:28Latest reply: Apr 12, 2017 19:30:01 1905 1 0 0

You may have encountered such questions as what types of indicators a fixed switch provides and how to distinguish them, or why an indicator turns red after a switch is powered on and what action should be taken in this situation.

Don't worry. I will share with you the basic knowledge about indicators on fixed switches.

Question 1: What types of indicators does a fixed switch provide?

Let me elaborate on indicators on a fixed switch from two dimensions.

  • In terms of locations, indicators include those on the chassis panels, cards, power modules, and fan modules.
  • In terms of types, indicators include port indicators and status indicators.

     Indicator Location

       Port Indicator

      Status Indicator

     Chassis panel

    Service port indicator (electrical/optical port)

    Indicator for other ports (USB port/ETH management port/console port/Mini USB port)

    Power status indicator (PWR)

    System status indicator (SYS)

    Mode indicator (STAT/SPEED/STACK/PoE mode)

     Card

      Service port indicator (electrical/optical port)

       Card status indicator (STAT)

     Power module

       None

    Power status indicator (STATUS)

    Input/output power indicator (INPUT/OUTPUT)

     Fan module

       None

       Fan status indicator (STATUS)

 

Not all switches or modules have all the listed indicators. Only the service port indicator, power status indicator, and system status indicator are present on every switch model. They are also the most frequently used indicators.

Question 2: How can I identify each type of indicators?

The indicators on cards, power modules, and fan modules can be easily identified. The indicators on a chassis panel are described here.

Status Indicators

On switches of versions earlier than V200R001, the power status indicator and the system status indicator have separate silkscreens. The SPEED, PoE, and STACK mode indicators are integrated into one (these modes are identified by color). You can press the mode switch button to switch between these modes.

20170411195820167001.png

On switches of V200R001 and later versions, each status indicator is independent and has its own silkscreen. You still need to press the mode switch button to switch between the SPED, STCK, and PoE modes. (Unlike the earlier versions, these modes are separate and do not need to be identified by color. When a mode is selected, the corresponding indicator turns green.)

20170411195839154001.png
 

If a switch uses a built-in power module, the power status indicator is named PWR. If a switch uses two pluggable power modules, the power status indicators are named PWR1 and PWR2.

A service port indicator shows different meanings in different modes. For example, when the STAT mode (default mode) is selected, a service port indicator shows the connection and data transmission status of this port. When the SPED mode is selected, the service port indicator shows the speed of this port.

Service Port Indicators

Service ports include electrical and optical ports, each having an independent indicator.

Service port indicators fall into the following three types:

  • First type: Each port has a single-color indicator (The indicator is green. In default mode, the steady on state indicates connection and the fast blinking state indicates data transmission). These service port indicators may be located in different positions:

   Above ports

You can determine the mapping between indicators and ports by the silkscreen.

20170411195912705001.png
 

  On ports

20170411195935138001.png
 

  • Second type: Each port has two single-color indicators. One is green (in default mode, the steady on state indicates connection) and the other one is yellow (in default mode, the fast blinking state indicates data transmission).

20170411195956800001.png
 

  • Third type: Each port has a two-color indicator (green and yellow). Only PoE devices have such indicators (in default mode, the steady green state indicates connection and the fast blinking green state indicates data transmission. In PoE mode, the green or yellow state indicates the PoE power supply situation. For example, the steady green state indicates that the port is supplying power to a PD and the blinking yellow state indicates that the port has stopped PoE power supply).

20170411200020347001.png

 

Question 3: What are the colors and states of indicators?

The indicators can be red, yellow, green, or blue.

Color

Meaning

Description

Red

Fault/alarm

Attention and immediate action are required.

Yellow

Minor alarm/critical state

The situation has changed or is going to change. (The situation needs to be determined based on the specific indicator).

Green

Normal

The situation is normal or the current process is permitted.

Blue

Specified meaning

Some switches have an ID indicator to help field engineers find them easily.

 

The following table lists possible states of indicators.

Indicator Status

Description

Off

The indicator is off.

Steady on

The indicator is on and maintains the same color.

Slow blinking

The indicator is on and blinks at a frequency of 0.5 Hz (blinks one time every 2 seconds).

Blinking quickly

The indicator is on and blinks at a frequency of 4 Hz (blinks four times every 1 second).

 

Question 4: How can I determine whether a switch is successfully powered on from its indicators?

You can determine the status of a switch that is powered on by checking the color of status indicators (PWR/SYS) and determine subsequent operations.

    PWR Indicator

    SYS Indicator

       Operation Suggestions

     Green

      Green

      The switch is successfully powered on.

     Off

       Off

       The switch is not powered on. You need to check whether it is correctly connected to an external power source and whether there is power input.

     Yellow

       -

    For a switch that uses a built-in power module, if the PWR indicator is yellow, the built-in power module is faulty and the switch is using the external redundant power system (RPS).

    For a switch that uses two pluggable power modules, if a PWR indicator is yellow (red in versions earlier than V200R001), the corresponding power module is faulty. You need to check whether the power switch on the power module is in the ON position and whether it is connected to an external power source. If so, the power module itself is faulty.

     -

       Red

       If the SYS indicator is red, fan or temperature alarms may have been generated. If a fan module is used, check whether the indicator on the fan module is normal (slow blinking green) and then check whether the switch overheats because of a high environment temperature. If they are normal, the switch is faulty.

 

For more information about indicators on fixed switches, refer to the hardware description manual of your product. Stay tuned for the next issue.

 

This post was last edited by 交换机在江湖 at 2017-04-11 20:19.
  • x
  • convention:

user_2790689     Created Apr 12, 2017 19:30:01 Helpful(0) Helpful(0)

good
  • x
  • convention:

Reply

Reply
You need to log in to reply to the post Login | Register

Notice: To protect the legitimate rights and interests of you, the community, and third parties, do not release content that may bring legal risks to all parties, including but are not limited to the following:
  • Politically sensitive content
  • Content concerning pornography, gambling, and drug abuse
  • Content that may disclose or infringe upon others ' commercial secrets, intellectual properties, including trade marks, copyrights, and patents, and personal privacy
Do not share your account and password with others. All operations performed using your account will be regarded as your own actions and all consequences arising therefrom will be borne by you. For details, see " Privacy."
If the attachment button is not available, update the Adobe Flash Player to the latest version!

Login and enjoy all the member benefits

Login
Fast reply Scroll to top