
We have one Unifi AP in a classroom that services iPads, last week it stopped working. Whenever it is power cycled, the network SSID from it is visible for about 1 minute then disappears, the green status light on in then flashes every now and then.
The controller seem to of crashed after upgrading. So we deleted it and re-installed the controller software, setup a new network, I held in the reset button to scan for the AP and we found it.
When we try to adopt the AP the adoption fails. Could this be the AP is on and our IP scheme is x?
Do I need to manually adjust the IP address, as I thought if the AP is set to automatic DHCP then it would automatically pick up our IP scheme?
Best Answer

Mace
OP
flashing green means the AP is disconnected and can't access the gateway on the network.
What are the different LED state
UAP/UAP LR/UAP Outdoor:
Blinking Amber/Orange - initializing
Steady Amber/Orange - factory defaults
Steady Green - adopted
Steady green with occasional flashing (once every 3 or 4 seconds) - isolated (This means that AP cannot reach to the gateway. Starting from vx, uplink monitor can be disabled under "Settings" > "System" > uncheck "Uplink Connectivity Monitor").
is the address it defaults to if it can't get an address via DHCP. are you sure the AP is connected to your network correctly?
If you connect a laptop to the line the AP is using (with POE removed) does the line work?
View this "Best Answer" in the replies below »
13 Replies

Ghost Chili
OP
Hmmmm, interesting issue. I can tell you the green light flashing is not right. Generally it is solid green.
I know we had one of our AP's get weird, and did the reset thing successfully and our network is not x.x.
What version of the controller are you using?
Also, I moved this over to the wireless forum.
0

Cayenne
OP
Has the PoE been moved/knocked?
0

Chipotle
OP
Derek_A wrote:
Hmmmm, interesting issue. I can tell you the green light flashing is not right. Generally it is solid green.
I know we had one of our AP's get weird, and did the reset thing successfully and our network is not x.x.
What version of the controller are you using?
Also, I moved this over to the wireless forum.
Thanks for moving to the correct forum, am using on UniFi Controller on Windows, it used to be on our Mac server but thought I would try a different controller.
0

Jalapeno
OP
So the AP is set to DHCP and it is picking up a address?
That seems odd considering your DHCP is x.
Is the server an address in the x network?
0

Chipotle
OP
SamSmithWolves wrote:
Has the PoE been moved/knocked?
It used to have a POE adapter to work with our POE switches, I have now moved it back to it's usual POE plug it comes with.
0

Chipotle
OP
Matthew wrote:
So the AP is set to DHCP and it is picking up a address?
That seems odd considering your DHCP is x.
Is the server an address in the x network?
I might be wrong on this, in the controller under the access point it has Network Settings and 'Using DHCP' is selected as opposed to 'Static IP' which I assume is correct.
The server is on
0

Mace
OP
Best Answer
flashing green means the AP is disconnected and can't access the gateway on the network.
What are the different LED state
UAP/UAP LR/UAP Outdoor:
Blinking Amber/Orange - initializing
Steady Amber/Orange - factory defaults
Steady Green - adopted
Steady green with occasional flashing (once every 3 or 4 seconds) - isolated (This means that AP cannot reach to the gateway. Starting from vx, uplink monitor can be disabled under "Settings" > "System" > uncheck "Uplink Connectivity Monitor").
is the address it defaults to if it can't get an address via DHCP. are you sure the AP is connected to your network correctly?
If you connect a laptop to the line the AP is using (with POE removed) does the line work?
0

Mace
OP
check out the Unifi Wiki it is full of good info
http://wiki.ubnt.com/UniFi_FAQ
0

Chipotle
OP
molan wrote:
flashing green means the AP is disconnected and can't access the gateway on the network.
What are the different LED state
UAP/UAP LR/UAP Outdoor:
Blinking Amber/Orange - initializing
Steady Amber/Orange - factory defaults
Steady Green - adopted
Steady green with occasional flashing (once every 3 or 4 seconds) - isolated (This means that AP cannot reach to the gateway. Starting from vx, uplink monitor can be disabled under "Settings" > "System" > uncheck "Uplink Connectivity Monitor").is the address it defaults to if it can't get an address via DHCP. are you sure the AP is connected to your network correctly?
If you connect a laptop to the line the AP is using (with POE removed) does the line work?
Bingo, the MAC address is being blocked from our DHCP server. Have just removed the block and it's now it's on solid green.
That's wasted 2 hours of my day, will need to have a word with my colleague.
Thanks for all the help guys.
0

Mace
OP

Ghost Chili
OP
alex howard wrote:
SamSmithWolves wrote:
Has the PoE been moved/knocked?
It used to have a POE adapter to work with our POE switches, I have now moved it back to it's usual POE plug it comes with.
Be aware that the Unifi's are 24 volt, not the usual 48 volts that most POE switches put out. You pretty much have to use their POE injector.
0

Jalapeno
OP
Sorry to resurrect an old thread but I am having this problem too - I understand that it probably is something on the network blocking the MAC address of the AP but how do I go about checking if its blocked / unblocking it?
0

Mace
OP
JoeDouglas wrote:
Sorry to resurrect an old thread but I am having this problem too - I understand that it probably is something on the network blocking the MAC address of the AP but how do I go about checking if its blocked / unblocking it?
If the above thread doesnt' help you then please open a new thread so we can assist you further. feel free to reference this one when you open the new one
1
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UniFi Status LED patterns
Table of Contents
Blue and White status LEDs apply to all our UniFi access points, routers, switches and the UDM (base model) with the exception of the legacy devices: UAP, UAP-LR, UAP-Outdoor5.
Legacy UAPs have Amber and Green LED on the front of the unit.
The animations are for illustrative purposes the speed of the flashing or strobing patterns below might differ slightly with that of the device.
While the LED patterns below are shown for Access Points, the rest of the UniFi device LED patterns have the same meaning.
Flashing White / Off every 1/2s
The device is initializing and booting up

Steady White
The device is awaiting Adoption

Slow flashing Blue (UDM only)
A client device is connected to the UDM via Bluetooth

Steady Blue
The device is adopted and is in normal operating mode
(Access Point is broadcasting SSIDs)

Strobing White / Off
If this happens, power cycle the Access Point.
If this doesnt help, please reach out to our support team.
Quickly flashing White / Blue
The device firmware is currently being upgraded do not interrupt the process!
(UDM will flash only white during an upgrade)

Blue and flashing Off every 5s
Access Point has lost network connectivity and is searching for wireless uplink

Rapid flashing Blue / Off
The device Locate feature was activated in the UniFi Network application

Flashing White-Blue-Off
The device is in TFTP mode.
To enable this mode:
- Hold the reset button before applying power
- Continue to hold the reset button until this LED sequence appears
If this wasnt intentional, please check if the devices reset button isnt jammed (it should click when pushed).

LED Off
The device is offline.
Verify the Power, POE, and Ethernet cables to troubleshoot.

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Access Points, Security Gateways, Switches and Cloud Keys
Back to Top
Starting with Gen2 UAPs, we moved on to the Blue and White LED. USGs, UniFi Switches and Cloud Keys also use the same Blue and White LED patterns showcased in the table below, and they will mean the same thing. Legacy UAPs will have an Amber and Green LED on the front of the unit as seen in the Legacy section. Some products don't feature status LED patterns, such as the PoE Adapters.
Back to Top
White and Blue LEDs apply to:
Access Points UAP-PRO, UAP-Outdoor+, UAP-AC, UAP-AC-OD, UAP-IW, UAP-AC-LITE, UAP-AC-LR, UAP-AC-PRO, UAP-AC-HD, UAP-AC-EDU
Routing & Switching Cloud Key: UC-CK
Security Gateways: USG, USG-PRO-4
Switches: US‑24‑W, US‑24‑W, US‑48‑W, US‑48‑W, US‑24, US‑48, US‑8, US‑8‑60W, US‑8‑W, US‑16‑W, US‑16‑XG
Device Activity
LED Pattern
Initializing
AP is Booting

Flashing White / Off Every 1/2s
Factory Defaults
AP is Awaiting Adoption

Steady White
Adopted
AP is Broadcasting SSIDs;
Normal Operating Mode

Steady Blue
Initialization Error A12
Power Cycle AP and Contact Support if Recurring
Strobing White / Off
Firmware Upgrade
AP is Busy with Upgrade
DO NOT INTERRUPT!

Quickly Flashing White / Blue
Isolated
AP Lost Network Connectivity,
Searching for Wireless Uplink

Blue and Flashing Off Every 5s
Locating
The AP Locate Feature was Activated in Controller or the UniFi AC EasySetup App

Rapid Flashing Blue / Off
Device Offline
Verify Power, POE and Ethernet Cable

LED Off
Legacy Amber and Green LED
Back to Top
Applies to: UAP, UAP-LR, UAP-Outdoor5.
Device Activity
LED Pattern
Initializing
AP is Booting

Flashing Amber / Off Every 1/2s
Factory Defaults
AP is Awaiting Adoption

Steady Amber
Adopted
AP is Broadcasting SSIDs;
Normal Operating Mode

Steady Green
Initialization Error A12
Power Cycle AP and Contact Support if Recurring
Strobing Amber / Off
Firmware Upgrade
AP is Busy with Upgrade
DO NOT INTERRUPT!

Quickly Flashing Amber / Green
Isolated
AP Lost Network Connectivity,
Searching for Wireless Uplink

Green and Flashing Off Every 5s
Locating
The AP Locate Feature was Activated in Controller or the UniFi AC EasySetup App

Rapid Flashing Green / Off
Device Offline
Verify Power, POE and Ethernet Cable

LED Off
Back to Top
The various UniFi Security Gateways and UniFi Switches will have a different type, number and location of ports, please be sure to reference your specific model's Quick Start Guide (pages ~, under the Hardware Overview section) for the exact location and description of its ports.
Console Port's right LED (in the applicable devices):
- LED Off: Power Off
- LED Green: Power On
- LED Off: No Link
- LED Amber: Link Established at 10/ Mbps
- LED Flashing Amber: Link Activity at 10/ Mbps
- LED Green: Link Established at Mbps
- LED Flashing Green: Link Activity at Mbps
- LED Off: No PoE
- LED Amber: IEEE af/at
- LED Green: 24V Passive
- LED Off: No Link
- LED Green: Link Established at 1 Gbps
- LED Flashing Green: Link activity at 1 Gbps
Back to Top
The LED of the PoE Adapters are simple to interpret:
LED is Off - PoE is Off
LED is On and steady - PoE is functioning as it should
LED is blinking - this is not a configured state, this just might mean the device is not connected properly, or that something is wrong with the cable.
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