[root@nmtg-net001 ~]# ip netns exec qrouter-4cb05b11-f895-420e-950c-e72ba6b83cb0 ping 10.81.78.1
PING 10.81.78.1 (10.81.78.1) 56(84) bytes of data.
From 10.81.78.101 icmp_seq=2 Destination Host Unreachable
From 10.81.78.101 icmp_seq=3 Destination Host Unreachable
From 10.81.78.101 icmp_seq=4 Destination Host Unreachable
^C
--- 10.81.78.1 ping statistics ---
7 packets transmitted, 0 received, +3 errors, 100% packet loss, time 6929ms
pipe 3
[root@nmtg-net001 ~]# ping -I br-ex 10.81.78.101
PING 10.81.78.101 (10.81.78.101) from 10.81.76.200 br-ex: 56(84) bytes of data.
^C
--- 10.81.78.101 ping statistics ---
24 packets transmitted, 0 received, 100% packet loss, time 23916ms

[root@nmtg-net001 ~]# ip netns exec qrouter-4cb05b11-f895-420e-950c-e72ba6b83cb0 ping 10.81.78.101
PING 10.81.78.101 (10.81.78.101) 56(84) bytes of data.
64 bytes from 10.81.78.101: icmp_seq=1 ttl=64 time=0.027 ms
64 bytes from 10.81.78.101: icmp_seq=2 ttl=64 time=0.023 ms
64 bytes from 10.81.78.101: icmp_seq=3 ttl=64 time=0.023 ms
64 bytes from 10.81.78.101: icmp_seq=4 ttl=64 time=0.023 ms
64 bytes from 10.81.78.101: icmp_seq=5 ttl=64 time=0.023 ms
^C
--- 10.81.78.101 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4943ms
rtt min/avg/max/mdev = 0.023/0.023/0.027/0.006 ms
[root@nmtg-net001 ~]# ip netns exec qrouter-4cb05b11-f895-420e-950c-e72ba6b83cb0 ip addr show
11: qg-9234ca1b-d4: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:1d:0b:3a brd ff:ff:ff:ff:ff:ff
    inet 10.81.78.101/25 brd 10.81.78.127 scope global qg-9234ca1b-d4
    inet 10.81.78.105/32 brd 10.81.78.105 scope global qg-9234ca1b-d4
    inet6 fe80::f816:3eff:fe1d:b3a/64 scope link
       valid_lft forever preferred_lft forever
16: qr-5a7bb7c2-7c: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:56:f9:4a brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.1/24 brd 192.168.1.255 scope global qr-5a7bb7c2-7c
    inet6 fe80::f816:3eff:fe56:f94a/64 scope link
       valid_lft forever preferred_lft forever
20: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
[root@nmtg-net001 ~]#