# PTM

The `nv unset` commands remove the configuration you set with the equivalent `nv set` commands. This guide only describes an `nv unset` command if it differs from the `nv set` command.

## nv set router ptm state

Enables and disables PTM. When enabled, PTM performs additional checks to ensure that routing adjacencies form only on links that have connectivity and that conform to the specification that the `ptmd` service defines. The default setting is `disabled`.

In Cumulus Linux 5.14 and earlier, you specify `enable on` or `enable off` instead of `state enabled` or `state disabled`.

### Version History

Introduced in Cumulus Linux 5.3.0

### Example

    cumulus@switch:~$ nv set router ptm state enabled