[root@net1 ~]# ip netns exec qrouter-93c11d9d-8ba6-44a9-be50-6bc7ede4ac73 ifconfig
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        loop  txqueuelen 0  (Local Loopback)
        RX packets 72  bytes 7952 (7.7 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 72  bytes 7952 (7.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

qg-5582b1c1-c7: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.16.111.222  netmask 255.255.255.252  broadcast 172.16.111.223
        ether fa:16:3e:a6:10:e2  txqueuelen 0  (Ethernet)
        RX packets 45240  bytes 4371969 (4.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 43521  bytes 5351801 (5.1 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

qr-ab5c67a2-38: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.16.111.77  netmask 255.255.255.252  broadcast 172.16.111.79
        ether fa:16:3e:4d:65:3d  txqueuelen 0  (Ethernet)
        RX packets 66  bytes 6188 (6.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 41213  bytes 1736242 (1.6 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@net1 ~]# ip netns exec qrouter-93c11d9d-8ba6-44a9-be50-6bc7ede4ac73 arp -a
? (172.16.111.78) at <incomplete> on qr-ab5c67a2-38
? (172.16.111.221) at a8:0c:0d:2d:aa:24 [ether] on qg-5582b1c1-c7
[root@net1 ~]# ip netns exec qrouter-93c11d9d-8ba6-44a9-be50-6bc7ede4ac73 ping 172.16.111.78
PING 172.16.111.78 (172.16.111.78) 56(84) bytes of data.
From 172.16.111.77 icmp_seq=1 Destination Host Unreachable
^C
--- 172.16.111.78 ping statistics ---
4 packets transmitted, 0 received, +1 errors, 100% packet loss, time 2999ms