.. _example_interfaces_tunnel_traffic_policy_checklinkhook:

###############
Check Link Hook
###############

This example demonstrates how to process outgoing NHRP
traffic in a scenario using one Tunnel with GRE
encapsulation.

.. image:: topology.svg
  :width: 800

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Test Marks In NHRP Traffic
**************************

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

In this scenario, a traffic policy was configured
to log outgoing NHRP traffic, which is non-IP Layer
3 protocol. The special hook ``link-out`` can be
used to process these outgoing frames.

Scenario
========

.. include:: checklinkhook/testmarksinnhrptraffic

.. raw:: html

  <hr>