.. code-block:: bash
- router_interface=$(ip a s | grep -w "global qr-*" | awk '{print $7}')
+ export router_interface=$(ip a s | grep -w "global qr-*" | awk '{print $7}')
ip -6 addr add 2001:db8:0:1::1 dev $router_interface
-**SETUP-SVM-26**: Update the file ``/opt/stack/opnfv_os_ipv6_poc/scenario2/radvd.conf`` with ``$router_interface``,
-i.e. replace ``$router_interface`` with the ``qr-xxx`` interface.
+**SETUP-SVM-26**: Update the sample file ``/opt/stack/opnfv_os_ipv6_poc/scenario2/radvd.conf``
+with ``$router_interface``.
+
+.. code-block:: bash
+
+ cp /opt/stack/opnfv_os_ipv6_poc/scenario2/radvd.conf /tmp/radvd.$router_interface.conf
+ sed -i 's/$router_interface/'$router_interface'/g' /tmp/radvd.$router_interface.conf
**SETUP-SVM-27**: Spawn a ``radvd`` daemon to simulate an external router. This ``radvd`` daemon advertises an IPv6
subnet prefix of ``2001:db8:0:1::/64`` using RA (Router Advertisement) on its $router_interface so that ``eth0``
.. code-block:: bash
- $radvd -C /opt/stack/opnfv_os_ipv6_poc/scenario2/radvd.conf -p /tmp/br-ex.pid.radvd -m syslog
+ $radvd -C /tmp/radvd.$router_interface.conf -p /tmp/br-ex.pid.radvd -m syslog
**SETUP-SVM-28**: Add an IPv6 downstream route pointing to the ``eth0`` interface of vRouter.