AWS Snowball Edge is no longer available to new customers. New customers should explore [AWS DataSync](https://aws.amazon.com/datasync/) for online transfers, [AWS Data Transfer Terminal](https://aws.amazon.com/data-transfer-terminal/) for secure physical transfers, or AWS Partner solutions. For edge computing, explore [AWS Outposts](https://aws.amazon.com/outposts/). 

# Setting the NTP time servers for the device with AWS OpsHub
<a name="setting-ntp"></a>

 Follow these steps to view and update which time servers your device must synchronize time with.

**To check time sources**

1. On the AWS OpsHub dashboard, find your device under **Devices**. Choose the device to open the device details page.

1. You will see a list of time sources that your device is synchronizing time with in the **Time sources** table.

   The **Time sources** table has four columns: 
   + **Address**: The DNS name / IP address of the time source
   + **State**: The current connection status between the device and that time source, there are 5 possible states:
     + **CURRENT**: Time source is currently being used to synchronize time
     + **COMBINED**: Time source is combined with the current source
     + **EXCLUDED**: Time source is excluded by the combining algorithm
     + **LOST**: Connection with the time source has been lost
     + **UNAVAILABILITY**: An invalid time source where the combining algorithm has deemed to be either a falseticker or has too much variability
   + **Type**: Network Time Protocol (NTP) sources can be a server or peer. A server can be set by the user using the **update-time-server** command, whereas a peer can only be set up using other Snowball Edge devices in the cluster and are automatically set up when the cluster is associated.
   + **Stratum**: The stratum of the source. **Stratum 1** indicates a source with a locally attached reference clock. A source that is synchronized to a Stratum 1 source is set at **Stratum 2**. A source that is synchronized to a stratum 2 source is set at **Stratum 3**, and so on.

**To update the time servers**

1. On the AWS OpsHub dashboard, find your device under **Devices**. Choose the device to open the device details page.

1. You will see a list of time sources that your device is synchronizing time with in the **Time sources** table.

1. Choose **Update time servers** on the **Time sources** table.

1. Provide the DNS name or the IP address of the time servers you would like your device to synchronize time with, and choose **Update**.  
![\[Update time servers showing NTP time server IP address field and Update button.\]](http://docs.aws.amazon.com/snowball/latest/developer-guide/images/opshub-update-time-console.png)

**Supported NTP device types and software versions**  
NTP isn't available on any version 2 storage and compute device types. Snowball Edge version 3 storage and compute device types with software version 77 or later support NTP, however. To check if NTP is enabled, use the Snowball Edge CLI command `describe-time-sources`.