AP blinks green

[Moudar]

Hi,

Please see this short video:

cisco-ap.mp4

Video Player is loading.

Play Video

Play

Mute

Current Time 0:00

/

Duration 0:00

Loaded: 0%

0:00

Stream Type LIVE

Seek to live, currently behind liveLIVE

Remaining Time -0:00

1x

Playback Rate

Chapters

• Chapters

Descriptions

• descriptions off, selected

Captions

• captions settings, opens captions settings dialog
• captions off, selected

Audio Track

Picture-in-PictureFullscreen

This is a modal window.

Beginning of dialog window. Escape will cancel and close the window.

Text

ColorWhiteBlackRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-Transparent

Background

ColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-TransparentTransparent

Window

ColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyTransparentSemi-TransparentOpaque

Font Size

50%75%100%125%150%175%200%300%400%

Text Edge Style

NoneRaisedDepressedUniformDropshadow

Font Family

Proportional Sans-SerifMonospace Sans-SerifProportional SerifMonospace SerifCasualScriptSmall Caps

Reset restore all settings to the default valuesDone

Close Modal Dialog

End of dialog window.

Close Modal Dialog

This is a modal window. This modal can be closed by pressing the Escape key or activating the close button.

I noticed that one of the APs has a solid blue LED, which seems to be normal. However, the other AP has a blinking green LED (which blinks all the time). Can you explain why it's blinking green (only green)? Also, what's the purpose of mounting two APs close together?

AP model AIR-CAP2702I-E-K9

I have tested monitor mode on the same model but the led was solid green and not blinking, so what am i missing here?

[liviu.gheorghe]

Hello @Moudar ,

please see the following link for AP led status:

https://www.cisco.com/c/en/us/td/docs/wireless/access_point/2700/quick/guide/ap2700getstart.html#pgfId-37791

Do you see it associated on the controller?

[Moudar]

As I don't own that AP, I cannot confirm if it's connected to a controller. However, I'm curious why it's positioned so close to another AP and has been blinking green for several years.

[liviu.gheorghe]

I'm afraid I cannot answer your question. It's a good question for the guys that dis the site survey which should have determined the AP's position.

My guess is that the AP in question either has some hardware problems - if you look at the causes for blinking green, you can see that they are related to hardware checking and booting the IOS - or some software problems with the IOS, or it's not associating with the WLC.

[Haydn Andrews]

Given its a 2700 series AP it may have hit the certificate expiry issue causing it not to join the controller, hence the flashing green:
https://www.cisco.com/c/en/us/support/docs/field-notices/639/fn63942.html 

As for why so close, im guessing it may have been for capacity reasons are there heaps of devices below this area?
Its also a bit hard to tell from that video but the APs look to be over 4m high which isnt best practice to mount internal model antennas.
Also hard to say but are those APs less than 4m apart

[Moudar]

Hi,

Under the AP that blinks there are about 100 self scanning devices like these:

I’m not sure if these devices use wifi, bluetooth, or some other way of communicating.

The height is about 6 meters and the distance between the two APs is less than 3 meters.

Maybe the purpose was to support these devices and all the people who enter this mall (These APs are mounted at the entrance)

In the end, maybe this shopping mall has a lazy network admin who sees the APs blinking but does nothing.

[Rich R]

So blinking green looks like AP unable to boot
You'd need to be on the AP console to see why it isn't booting.

Those handheld terminals for self-scanning are usually connected to WiFi.