Hostname blank on several devices.

Products

• Network Observability
• CA Performance Management

Issue/Introduction

Hostname blank on several devices.

 

Environment

Performance Management, all supported versions

Cause

If we are not able to resolve the hostname through DNS at its the first time of the device discovery, we will NOT perform the name lookup every 24 hours.   We only perform the 24-hours hostname lookup for the device items that already have a hostname resolved.

Resolution

Either:

1) Rediscover the device by running a discovery profile discovery.

2) Update the hostname via REST

  a) Get the Data Aggregator Item ID of the device.

Administration -> Monitored Items Management ->Monitored devices. Pull up the device and on the details page and the ID we need is the "Item ID:" 

  b) Add the hostname via rest call:

URL: http(s)://<DA_SYSTEM>:PORT/rest/devices/<Item ID:>
Method: PUT
Body:

<Device version="1.0.0">
<HostName>HOSTNAME</HostName>
</Device>