.. _example_protocols_ripng_timers_timeout:

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Timeout
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Test to verify RIPng **timeout timer** functionality for detecting unreachable IPv6 routes.
When a router stops receiving updates from a neighbor, the ``timeout timer`` automatically
marks routes as **invalid** (``metric 16`` = unreachable) after the configured timeout period.
This test simulates neighbor loss by removing RIPng configuration from the advertising router.

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Test RIPng Timeout Timer
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Description
===========

Verify ``RIPng`` **timeout timer** marks IPv6 routes as **invalid** when updates stop arriving.
Initially, **DUT0** advertises the route ``2001:db8:10::/64`` to **DUT1**. Then ``RIPng`` is
deleted from **DUT0** to simulate a neighbor loss scenario. After ``5`` seconds
without receiving updates, **DUT1** marks the route with ``metric 16`` which indicates the
route is **unreachable**. The route remains visible in the routing table but is not used for
forwarding traffic.

Scenario
========

.. include:: timeout/testripngtimeouttimer

.. raw:: html

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