PlayerPositionSync.cs

using UnityEngine;
using System.Collections;
using UnityEngine.Networking;

public class PlayerPositionSync : NetworkBehaviour {

	[SyncVar]
	private Vector3 syncPosition;

	public Transform transform;
	public float lerpRate = 15;

	void FixedUpdate () {
		TransmitPosition ();
		LerpPosition ();
	}

	void LerpPosition() {
		if(!isLocalPlayer) {
			transform.position = Vector3.Lerp (transform.position, syncPosition, Time.deltaTime * lerpRate);
		}
	}

	[Command]
	void CmdProvidePositionToServer(Vector3 position) {
		syncPosition = position;
	}

	[ClientCallback]
	void TransmitPosition() {
		CmdProvidePositionToServer (transform.position);
	}
}