def install_config(F5, body):
    """
        If the node exists, attempt to issue PATCH, otherwise, issue POST. User has either specified
        a POST or defaulted to POST.
    """
    if F5.node_exists(body):
        body = F5.modify_url_and_body(body)
        return F5.genericPATCH(body)
    else:
        return F5.genericPOST(body)