When running discovery, IP Fabric needs to connect directly to the
device console. Because of that, to discover Quagga/FRR devices, a separate user with a
specific shell needs to be created on a device.
Quagga / FRR shell usually runs in /usr/bin/vtysh.
A new user with a direct access to Quagga / FRR shell needs to be created
as follows in the bash:
useradd-s/usr/bin/vtyshusername
Afterwards, you will be prompted to set up a password. Add this username and password to IP Fabric credentials used for
discovery.