Hi there, Thank you very much Quentin for your help, it worked. ubuntu@ubuntu-vm:~/frr$ sudo /etc/init.d/frr start Loading capability module if not yet done. Starting Frr daemons (prio:10):.1024 zebra2018/07/24 22:56:08 warnings: ZEBRA: Disabling MPLS support (no kernel support).1024 bgpd.1024 ripd.1024 ripngd.1024 ospfd.1024 ospf6d.1024 isisd. Starting Frr monitor daemon:1024 watchfrr. Exiting from the script ubuntu@ubuntu-vm:~/frr$ sudo vtysh Hello, this is FRRouting (version 5.1-dev-MyOwnFRRVersion-g4dbd617). Copyright 1996-2005 Kunihiro Ishiguro, et al. This is a git build of frr-5.1-dev-347-g4dbd617 Associated branch(es): local:master github/frrouting/frr.git/master I would like to change any label for test, for example the label that follows below and to compile and see the new label being presented. How should I proceed. Copyright 1996-2005 Kunihiro Ishiguro, et al Regards, Fabio