.. index:: pair: group; Reset NIC when data flows
.. _doxid-group__ethtool-reset__under__traffic:

Reset NIC when data flows
=========================

.. toctree::
	:hidden:

Check that NIC can be reset when data is transmitted over it and that data transmission resumes after NIC is reset.

Scenarios: X3-ET021.



#. If IPv6 is checked, enable **keep_addr_on_down** setting on the IUT interface to avoid network address disappearance when interface is reset.

#. Create a pair of connected UDP sockets on IUT and Tester.

#. Fork new RPC servers on IUT and Tester for sending and receiving data.

#. Start sending UDP packets from IUT with help of **rpc_pattern_sender()** and receiving them on Tester with help of **rpc_drain_fd()**.

#. Start sending UDP packets from Tester with help of **rpc_pattern_sender()** and receiving them on IUT with help of **rpc_drain_fd()**.

#. Wait for a while.

#. Call **ioctl** (``SIOCETHTOOL`` / ``ETHTOOL_RESET``) with reset flags set according to **flags** on the IUT interface.

#. Wait until **rpc_pattern_sender()** on IUT and **rpc_drain_fd()** on Tester terminate successfully.

#. Wait until **rpc_pattern_sender()** on Tester and **rpc_drain_fd()** on IUT terminate successfully.

#. Check that data can be sent and received in both directions over the pair of UDP sockets.

Dmitry Izbitsky `Dmitry.Izbitsky@oktetlabs.ru <mailto:Dmitry.Izbitsky@oktetlabs.ru>`__



.. rubric:: Parameters:

.. list-table::
	:widths: 20 80

	*
		- env

		- 
		  Testing environment:
		  
		  * :ref:`env.peer2peer <doxid-group__env-peer2peer>`
		  
		  * :ref:`env.peer2peer_ipv6 <doxid-group__env-peer2peer__ipv6>`

	*
		- flags

		- Ethtool reset flags to check.