
    /**
     * Returns true if the port is up, i.e., it's neither administratively
     * down nor link down. It currently does NOT take STP state into
     * consideration
     * @return whether the port is up
     */
    public boolean isEnabled() {
        return (!state.contains(OFPortState.LINK_DOWN) && !config.contains(OFPortConfig.PORT_DOWN));
    }