Hi, 1. I'm testing this in FRR master. 2. /etc/frr/frr.conf is deleted so per daemon configuration file can be used 3. enabled ospfd_instances=2,3,4,5 in /etc/frr/daemons ospfd=yes ospfd_instances=2,3,4,5 Now, do "no router instance-id" for all instances and then "router ospf" and add below statements: ospf router-id 1.1.1.1 network 20.20.20.0/24 area 0 Please notice that configuration is "replicated" and if I save the configuration then above conf is written to all conf files. Please advise === amol@amol-Virtual-Machine:~/frr$ sudo vtysh % Can't open configuration file /etc/frr/vtysh.conf due to 'No such file or directory'. Hello, this is FRRouting (version 7.6-dev-MyOwnFRRVersion-g82b844d8d). Copyright 1996-2005 Kunihiro Ishiguro, et al. This is a git build of frr-7.4-dev-1400-g82b844d8d Associated branch(es): local:master github/FRRouting/frr.git/master amol-Virtual-Machine# sh run Building configuration... Current configuration: ! frr version 7.6-dev-MyOwnFRRVersion frr defaults traditional hostname amol-Virtual-Machine no ip forwarding no ipv6 forwarding ! router ospf 2 ! router ospf 3 ! router ospf 4 ! router ospf 5 ! line vty ! end amol-Virtual-Machine# conf term amol-Virtual-Machine(config)# no router ospf 2 amol-Virtual-Machine(config)# no router ospf 3 amol-Virtual-Machine(config)# no router ospf 4 amol-Virtual-Machine(config)# no router ospf 5 amol-Virtual-Machine(config)# router ospf amol-Virtual-Machine(config-router)# ospf router-id 1.1.1.1 amol-Virtual-Machine(config-router)# network 20.20.20.0/24 area 0 amol-Virtual-Machine(config-router)# do sh run Building configuration... Current configuration: ! frr version 7.6-dev-MyOwnFRRVersion frr defaults traditional hostname amol-Virtual-Machine no ip forwarding no ipv6 forwarding ! router ospf ospf router-id 1.1.1.1 network 20.20.20.0/24 area 0 ospf router-id 1.1.1.1 network 20.20.20.0/24 area 0 ospf router-id 1.1.1.1 network 20.20.20.0/24 area 0 ospf router-id 1.1.1.1 network 20.20.20.0/24 area 0 ! line vty ! end ====