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+.. _srv6_mobile_runner_doc:
+
+SRv6 Mobile Runner
+==================
+
+What’s ``runner.py`` doing?
+
+Common configurations
+---------------------
+
+VPP1
+~~~~
+
+::
+
+   create host-interface name eth1
+   set int ip addr host-eth1 A1::1/120
+   set int state host-eth1 up
+   ip route add ::/0 via host-eth1 A1::2
+
+VPP2
+~~~~
+
+::
+
+   create host-interface name eth1
+   set int ip addr host-eth1 A1::2/120
+   create host-interface name eth2
+   set int ip addr host-eth2 A2::1/120
+   set int state host-eth1 up
+   set int state host-eth2 up
+   ip route add ::/0 via host-eth2 A2::2
+
+VPP3
+~~~~
+
+::
+
+   create host-interface name eth1
+   set int ip addr host-eth1 A2::2/120
+   create host-interface name eth2
+   set int ip addr host-eth2 A3::1/120
+   set int state host-eth1 up
+   set int state host-eth2 up
+   ip route add ::/0 via host-eth1 A2::1
+
+VPP4
+~~~~
+
+::
+
+   create host-interface name eth1
+   set int ip addr host-eth1 A3::2/120
+   set int state host-eth1 up
+   ip route add ::/0 via host-eth1 A3::1
+
+Drop-in for GTP-U over IPv4
+---------------------------
+
+Drop-in mode is handy to test both GTP-U-to-SRv6 and SRv6-to-GTP-U
+functions at same time. Let’s see what’s happened when you run
+``test gtp4``:
+
+::
+
+   $ ./runner.py test gtp4
+
+Setting up a virtual interface of packet generator:
+
+.. _vpp1-1:
+
+VPP1
+~~~~
+
+::
+
+   create packet-generator interface pg0
+   set int mac address pg0 aa:bb:cc:dd:ee:01
+   set int ip addr pg0 172.16.0.1/30
+   set ip arp pg0 172.16.0.2/30 aa:bb:cc:dd:ee:02
+
+.. _vpp4-1:
+
+VPP4
+~~~~
+
+::
+
+   create packet-generator interface pg0
+   set int mac address pg0 aa:bb:cc:dd:ee:11
+   set int ip addr pg0 1.0.0.2/30
+   set ip arp pg0 1.0.0.1 aa:bb:cc:dd:ee:22
+
+SRv6 and IP routing settings:
+
+.. _vpp1-2:
+
+VPP1
+~~~~
+
+::
+
+   sr policy add bsid D4:: next D2:: next D3::
+   sr policy add bsid D5:: behavior t.m.gtp4.d D4::/32 v6src_prefix C1::/64 nhtype ipv4
+   sr steer l3 172.20.0.1/32 via bsid D5::
+
+.. _vpp2-1:
+
+VPP2
+~~~~
+
+::
+
+   sr localsid address D2:: behavior end
+   ip route add D3::/128 via host-eth2 A2::2
+
+.. _vpp3-1:
+
+VPP3
+~~~~
+
+::
+
+   sr localsid address D3:: behavior end
+   ip route add D4::/32 via host-eth2 A3::2
+
+.. _vpp4-2:
+
+VPP4
+~~~~
+
+::
+
+   sr localsid prefix D4::/32 behavior end.m.gtp4.e v4src_position 64
+   ip route add 172.20.0.1/32 via pg0 1.0.0.1