Hi, I am a newbie with frr/ospf. My aim is to run two ospfd instances in a Linux network namesspace each and let them talk to each other via a virtual link (interface called uplink). My test setup is attached. But I do not see any traffic. This is probably some basic configuration error. I did have a look at the documentation, but it did not seem to cover such simple setups. A few pointer in the right direction would be helpful. thanks, mwarning $ ip netns add ns-0 $ ip netns add ns-1 # Node 0: $ sudo ip netns exec ns-0 ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 4: uplink@if3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether ce:e6:b3:5d:d3:70 brd ff:ff:ff:ff:ff:ff link-netns switch inet 192.168.1.0/24 scope global uplink valid_lft forever preferred_lft forever inet6 fe80::cce6:b3ff:fe5d:d370/64 scope link valid_lft forever preferred_lft forever $ cat ospf0.conf router ospf ospf router-id 192.168.1.0 network 192.168.1.0/24 area 1 $ sudo ip netns exec ns-0 ospfd --terminal -f ./ospf0.conf -i /run/frr/ospfd0.pid # Node 1: $ sudo ip netns exec ns-1 ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 7: uplink@if6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether 12:45:ca:46:19:52 brd ff:ff:ff:ff:ff:ff link-netns switch inet 192.168.1.1/24 scope global uplink valid_lft forever preferred_lft forever inet6 fe80::1045:caff:fe46:1952/64 scope link valid_lft forever preferred_lft forever $ cat ospf1.conf router ospf ospf router-id 192.168.1.1 network 192.168.1.0/24 area $ sudo ip netns exec ns-1 ospfd --terminal -f ./ospf1.conf -i /run/frr/ospfd1.pid