Authentication error: Client is not authenticated while trying to add search peers to the search head

[snorri]

I'm trying to set up a simple Splunk environment, but when running:

$SPLUNK_HOME/bin/splunk add search-server http://192.168.4.210:8089 -auth admin:password -remoteUsername admin -remotePassword password

I get this message:

An authentication error occurred: Client is not authenticated

I'm kind of new to this and have been googling for a couple of Hours now with no luck.
Why am I getting this error, and how can I make this work?

[gcusello]

Hi snorri,
let me understand: what's your environment and what do you want to reach?
What do you mean with "simple environment" ?

Anyway, the "splunk add search-server" permits to you to add a Search Peer to a Search Head, have you a distributed environment?
You could do the same thing, in easily way, by web interface.

Bye.
Giuseppe