# Unpairing Sensor from Brain

## Introduction

Unpairing is the process of removing the sensor and brain association. The sensor unpairing may be required in case of :

1. Brain migration to new IP.
2. The sensor is being returned to Vectra.

Related Links:

* [Pairing Physical Sensors](broken://pages/blRNiOQebqQnfaYQyFIl)
* [How do I clear data from a Vectra Cognito brain or sensor before returning the appliance?](broken://pages/mEdLAqVZ1KmYhzbpAuD1)

## Preparation:

1. You can see the list of paired sensors and the list of sensors available for pairing from the "brain\_web\_UI -> Data Sources -> network -> Sensors":\
   Note: On Cognito Detect Version 7.3 and below: Manage → Sensors:\
   ![](/files/laZt6d4qbaUrP9YRtcWN)\
   The status column indicates whether the sensor has been paired (i.e. Forwarding / Not-forwarding) or is available for pairing (i.e. Provisioned / Pairing). Sensors that have been paired with other brain devices are not listed on this screen.

## Steps:

#### From the UI

1. Go to "Brain\_Web\_UI -> Data Sources -> Network -> Sensors".
2. Hover the cursor over the sensor you want to unpair; to see the unpair icon (Marked with a red border in the below picture). Click on it.\
   ![](/files/vpi5TGLmwshoqdMALDAa)
3. The pop-up show like the below screen. Click on the "Unpair Sensor" button ![](/files/jnTiY7opG2k0AW2V1y44)\
   The status of sensor will chnage to unpairing.\
   ![](/files/sCa2Tf1Ju7PquLULA3ZV)
4. Wait for approx 5 minutes; the sensor status should chage to "Provisioned" .\
   ![](/files/npEMqCDBOThVnQDTAPfm)
5. There may be situations when the brain is not able to reach the sensor; in that case:
   1. Click on unpair button again.\
      ![](/files/d0c2aUrzICr8jNmawOzN)
   2. The pop-up will appear . Click on "Force Unpair Sensor".\
      ![](/files/cIQzA6WTzyeRAMTS22VL)\
      If the sensor is a Virtual Sensor, just delete the sensor image; and if it's a physical sensor then login to sensor VCLI as a 'vectra' user, and run the command

      ```ckeditor_codeblock
      show brain
      del brain
      show brain
      ```

      The sensor unpairing is complete now.

#### From CLI

1. To list the sensor:

   ```language-c
   show sensors
   ```
2. Now, to unpair (*replace \[SERIAL] by the sensor serial number*):

   ```language-c
   sensor unpair [SERIAL]
   ```
3. In special cases, for example, if a virtual sensor was deleted from the host before unpairing it, you will can force the removal:

   ```language-c
   sensor unpair --force [SERIAL]
   ```

####

#### **Unpairing Cloud Sensor:**

1. Login to the QUX/RUX portal > Data sources > Select cloud sensor (AWS CloudTrail, Azure AD & M365) and expand it.
2. Click on the “Delete” icon\
   ![](/files/ZimpkXcMDh1m8QNUO3uT)
3. It will ask for the confirmation page, select “Remove Connection”\
   ![](/files/R8KEeqS3BYUSiEhznDnH)
4. Wait for 2 minutes, and the cloud sensor will disappear.

## Verification:

1. The Sensor state should be at the 'Available' state at "Brain\_Web\_UI -> Data Sources -> Network -> Sensors".\
   ![Sensor Available for pairing](/files/quu9ptdBbm3ti3NfmeeM)
2. In the case of the Physical Sensor, the following VCLI command should give \<blank> result.

   ```ckeditor_codeblock
   show brain
   ```

## Troubleshooting:

If prerequisites are passing then sensor pairing can go as easily as it can be; however in case of any issue please contact Vectra support. If possible, please add the following information to the ticket:

1. Output of VCLI commands on Sensor:

```ckeditor_codeblock
show serial-number
show version
show brain
show interface
```

2. Output of VCLI commands on the brain:

```ckeditor_codeblock
show serial-number
show version
show interface
```

```
 
```

3\. Screenshot of sensor detail at: "brain\_web\_UI -> Data Sources -> Network -> Sensors"; then scroll to the sensor in the subject and click on the tree.


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