pfSense

	/* NOTE: Cleanup static routes for the interface route if any */

	if (!empty($a_gateways[$id]) && is_ipaddr($a_gateways[$id]['gateway']) && 

		$gateway['gateway'] != $a_gateways[$id]['gateway'] &&

		isset($a_gateways[$id]["nonlocalgateway"])) {

		$realif = get_real_interface($a_gateways[$id]['interface']);

		$inet = (!is_ipaddrv4($a_gateways[$id]['gateway']) ? "-inet6" : "-inet");

		$cmd = "/sbin/route delete $inet " . escapeshellarg($a_gateways[$id]['gateway']) . " -iface " . escapeshellarg($realif);

		mwexec($cmd);

	}

		/* NOTE: If gateway ip is changed need to cleanup the old static interface route */

		if ($_POST['monitor'] != "dynamic" && !empty($a_gateway_item[$realid]) && is_ipaddr($a_gateway_item[$realid]['gateway']) &&

			$gateway['gateway'] != $a_gateway_item[$realid]['gateway'] &&

			isset($a_gateway_item[$realid]["nonlocalgateway"])) {

			$realif = get_real_interface($a_gateway_item[$realid]['interface']);

			$inet = (!is_ipaddrv4($a_gateway_item[$realid]['gateway']) ? "-inet6" : "-inet");

			$cmd = "/sbin/route delete $inet " . escapeshellarg($a_gateway_item[$realid]['gateway']) . " -iface " . escapeshellarg($realif);

			mwexec($cmd);

		}