PlayerSyncPos.cs

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

public class PlayerSyncPos : NetworkBehaviour
{
    [SyncVar]
    private Vector3 syncPosition;
    public float lerpSpeed = 60;

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

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

    [Client]
    void TransmitPosition()
    {
        if (isLocalPlayer)
        {
            CmdSendPosition(transform.position);
        }
    }

    [Command]
    void CmdSendPosition(Vector3 pos)
    {
        syncPosition = pos;
    }

}