.. _example_protocols_ripng_timers_garbage-collection:

##################
Garbage-Collection
##################

Test to verify RIPng **garbage collection timer** for removing stale IPv6 routes.
This validates the **two-stage removal process:** After routes are marked **invalid** by the
``timeout timer`` (``metric 16``), the ``garbage collection timer`` **completely removes** them
from the routing table. This test simulates neighbor loss by removing RIPng configuration.

***********************************
Test RIPng Garbage Collection Timer
***********************************

Description
===========

Verify ``RIPng`` **garbage collection timer** completely removes invalid IPv6 routes.
**DUT0** advertises the route ``2001:db8:10::/64`` to **DUT1**. Then ``RIPng`` is deleted from
**DUT0** to simulate a neighbor loss. After 5 seconds, the route is marked
as **invalid** with ``metric 16``. After an additional 5 seconds, the route
is **completely removed** from the routing table. This demonstrates the **two-stage process**
that prevents stale routes from persisting indefinitely.

Scenario
========

.. include:: garbage-collection/testripnggarbagecollectiontimer

.. raw:: html

  <hr>