hi
if we use the command set protocols isis advertise-passive-only to advertise only the subnet associate the passive interface , it doesn't allow to install any route on the RIB ( in IPv4/IPv6) , here is the basic setting to replicate it "
interfaces set interfaces dummy dum0 address '2001:db8:2:2::20/64' set interfaces dummy dum10 address '10.0.2.12/24' set interfaces ethernet eth1 address '2001:db8:3::2/64' set interfaces ethernet eth1 address '172.16.120.2/24' set interfaces ethernet eth1 mtu '1500' # isis - configuration set protocols isis dynamic-hostname set protocols isis advertise-passive-only set protocols isis interface dum0 passive set protocols isis interface dum10 passive set protocols isis interface eth1 circuit-type 'level-2-only' set protocols isis interface eth1 network point-to-point set protocols isis level 'level-2' set protocols isis net '49.0001.0bad.cafe.0002.00'