.. _example_protocols_bgp_peer-group_attribute-unchanged:

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Attribute-Unchanged
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Scenario to verify BGP **peer-group attribute-unchanged** inheritance.
This command prevents the router from modifying specific BGP attributes when
advertising routes to neighbors that are members of the peer-group. By default,
when advertising to an eBGP peer, the router changes the next-hop to its own address,
prepends its AS number to the AS-path, and may modify the MED value. The
``attribute-unchanged`` command allows preserving these attributes in their original
form. The **as-path** option prevents the router from prepending its local AS to the
path. The **med** option preserves the Multi-Exit Discriminator value without
modification. The **next-hop** option keeps the original next-hop address instead of
replacing it with the advertising router's address.

.. image:: attribute-unchanged.svg
  :width: 400

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Test eBGP - Peer-group attribute-unchanged
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Description
===========

Test ``attribute-unchanged`` options (as-path, next-hop, med) on a peer-group.
Baseline shows default re-advertisement behavior; each option preserves the
corresponding attribute.

Scenario
========

.. include:: attribute-unchanged/testebgp-peer-groupattribute-unchanged

.. raw:: html

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