About RESTCONF

RESTCONF is defined in the RFC 8040

The GET method is sent by the client to retrieve data for a resource.
The HEAD method is sent by the client to retrieve just the header fields (which contain the metadata for a resource) that would be returned for the comparable GET method, without the response message-body. It is supported for all resources that support the GET method.
The POST method is sent by the client to create a data resource.
The PUT method is sent by the client to create or replace the target data resource.
The DELETE method is used to delete the target resource.

EOS configuration

Please refer to this link

The default RESTCONF port on Arista devices is TCP 6020.

We need to change the default control-plane ACL on EOS in order to allow TCP 6020 (or the configured RESTCONF TCP port).

Please refer to this link