.. _example_protocols_bgp_network_networkbackdoor:

################
Network Backdoor
################

Scenario to verify BGP **network backdoor** command functionality.
Tests backdoor route functionality for both iBGP and eBGP sessions.
Backdoor routes modify the administrative distance to prefer IGP routes over BGP.

.. image:: networkbackdoor.svg
  :width: 800

******************************
Test BGP Network Backdoor iBGP
******************************

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

Test BGP **network backdoor** with iBGP using 3 routers. **DUT0** announces
``192.168.10.0/24`` via OSPF and BGP. **DUT1** has OSPF and BGP with backdoor, so it
prefers OSPF route (AD 110) over iBGP route (AD 20 with backdoor instead of 200).
**DUT2** learns the route via iBGP from DUT1.

Scenario
========

.. include:: networkbackdoor/testbgpnetworkbackdooribgp

.. raw:: html

  <hr>

******************************
Test BGP Network Backdoor eBGP
******************************

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

Test BGP **network backdoor** with eBGP using 3 routers. **DUT0** (AS 10) announces
``192.168.10.0/24`` via OSPF and BGP. **DUT1** (AS 10) has OSPF and BGP with backdoor.
**DUT2** (AS 20) learns the route via eBGP from DUT1.

Scenario
========

.. include:: networkbackdoor/testbgpnetworkbackdoorebgp

.. raw:: html

  <hr>