# UDM Configurations (Interfaces)

## Overview

The User-Defined Metadata allows for additional information to be added to a record for a given network interface. It can also be used to override existing fields.

## Configurations

### EF\_PROCESSOR\_ENRICH\_NETIF\_METADATA\_ENABLE

Specifies whether the user-defined metadata enrichment is enabled.

* Valid Values
  * `true`, `false`
* Default
  * `true`

### EF\_PROCESSOR\_ENRICH\_NETIF\_METADATA\_USERDEF\_PATH

If the user-defined metadata enrichment is enabled (`EF_PROCESSOR_ENRICH_NETIF_METADATA_ENABLE` is `true`) this setting specifies the path to the metadata file. If this value is undefined or empty, metadata enrichment will be disabled.

For more details on the format of this file and the behavior of the User-Defined Metadata functionality, refer to: [User-Defined Metadata Enrichment](/flowcoll/configuration/enrichment-options/enrich_netif_options/enrich_netif.md#user-defined-metadata-enrichment)

* Default
  * `''`
* Recommended
  * `/etc/elastiflow/metadata/netifs.yml`

### EF\_PROCESSOR\_ENRICH\_NETIF\_METADATA\_REFRESH\_RATE

The file specified in `EF_PROCESSOR_ENRICH_NETIF_METADATA_USERDEF_PATH` can be loaded automatically to refresh values without restarting the collector. This value specifies the refresh interval, in minutes, that the file will be reloaded. The value of `0` disables refreshing of the values.

* Default
  * `15`


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