Hi Chenjie, we just moved to a recent ISO "20190604T144018Z",but with the same problem,  showing the following info:
compute-0:~$ sudo ip netns
Password:
qrouter-da72fdce-d5ec-4507-b0d3-9488f59974b2 (id: 7)
qrouter-543c6d12-ea46-4306-9824-057a63e8838e (id: 6)
qdhcp-9f2da2b3-5e87-4fe8-a99e-b05e173b4baf (id: 5)
qdhcp-31e9c0c9-55ee-43ae-919a-fa03f80f71ab (id: 4)
qdhcp-29050f23-f8ba-475e-b462-34b73db305ec (id: 3)

compute-1:~$ sudo ip netns
Password:
qdhcp-26a49682-1aac-4799-9370-40d3431b942e (id: 1)
qdhcp-13c1d984-1bd1-43bb-b868-103c368ad1cb (id: 0)

COMPUTE-0
 sudo ip netns exec qdhcp-9f2da2b3-5e87-4fe8-a99e-b05e173b4baf ifconfig
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tap35491304-72: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST>  mtu 1500
        inet 192.168.0.2  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::f816:3eff:fe35:dc62  prefixlen 64  scopeid 0x20<link>
        ether fa:16:3e:35:dc:62  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 5  bytes 446 (446.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


sudo ip netns exec qdhcp-31e9c0c9-55ee-43ae-919a-fa03f80f71ab ifconfig
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 1  bytes 576 (576.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1  bytes 576 (576.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tapeac7f54a-4b: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST>  mtu 1500
        inet 169.254.169.254  netmask 255.255.0.0  broadcast 169.254.255.255
        inet6 fe80::f816:3eff:fe4a:4268  prefixlen 64  scopeid 0x20<link>
        ether fa:16:3e:4a:42:68  txqueuelen 1000  (Ethernet)
        RX packets 121  bytes 12487 (12.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 79  bytes 10485 (10.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

 sudo ip netns exec qdhcp-29050f23-f8ba-475e-b462-34b73db305ec ifconfig
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 2  bytes 1152 (1.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2  bytes 1152 (1.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tapf1a60929-96: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST>  mtu 1500
        inet 192.168.101.2  netmask 255.255.255.0  broadcast 192.168.101.255
        inet6 fe80::f816:3eff:fe55:ce69  prefixlen 64  scopeid 0x20<link>
        ether fa:16:3e:55:ce:69  txqueuelen 1000  (Ethernet)
        RX packets 223  bytes 22838 (22.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 131  bytes 18290 (17.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0



Compute-0 IP's
enp134s0f0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::3efd:feff:fed1:c6ac  prefixlen 64  scopeid 0x20<link>
        ether 3c:fd:fe:d1:c6:ac  txqueuelen 1000  (Ethernet)
        RX packets 2958  bytes 177480 (173.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 7702  bytes 1454822 (1.3 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp134s0f1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.10.60.69  netmask 255.255.255.0  broadcast 10.10.60.255
        inet6 fe80::3efd:feff:fed1:c6ad  prefixlen 64  scopeid 0x20<link>
        ether 3c:fd:fe:d1:c6:ad  txqueuelen 1000  (Ethernet)
        RX packets 30656979  bytes 16954989898 (15.7 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 33815948  bytes 19911073526 (18.5 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp134s0f1:5: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.206.31  netmask 255.255.255.0  broadcast 192.168.206.255
        ether 3c:fd:fe:d1:c6:ad  txqueuelen 1000  (Ethernet)


Compute 1 namespaces ips:

sudo ip netns exec qdhcp-26a49682-1aac-4799-9370-40d3431b942e ifconfig
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tap071c59fa-41: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST>  mtu 1500
        inet 192.168.0.2  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::f816:3eff:fe02:fb19  prefixlen 64  scopeid 0x20<link>
        ether fa:16:3e:02:fb:19  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 5  bytes 446 (446.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
sudo ip netns exec qdhcp-13c1d984-1bd1-43bb-b868-103c368ad1cb ifconfig
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tap4723d966-a4: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST>  mtu 1500
        inet 192.168.201.2  netmask 255.255.255.0  broadcast 192.168.201.255
        inet6 fe80::f816:3eff:fe74:3c61  prefixlen 64  scopeid 0x20<link>
        ether fa:16:3e:74:3c:61  txqueuelen 1000  (Ethernet)
        RX packets 123  bytes 11662 (11.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 71  bytes 9331 (9.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0





Compute-1 IP's:

enp134s0f0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::3efd:feff:fed1:c53c  prefixlen 64  scopeid 0x20<link>
        ether 3c:fd:fe:d1:c5:3c  txqueuelen 1000  (Ethernet)
        RX packets 2951  bytes 177060 (172.9 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 7688  bytes 1452176 (1.3 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp134s0f1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.10.60.32  netmask 255.255.255.0  broadcast 10.10.60.255
        inet6 fe80::3efd:feff:fed1:c53d  prefixlen 64  scopeid 0x20<link>
        ether 3c:fd:fe:d1:c5:3d  txqueuelen 1000  (Ethernet)
        RX packets 13356451  bytes 9595449895 (8.9 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 9643625  bytes 1789060302 (1.6 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp134s0f1:5: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.206.171  netmask 255.255.255.0  broadcast 192.168.206.255
        ether 3c:fd:fe:d1:c5:3d  txqueuelen 1000  (Ethernet)


Ping from instance in Compute-1 to inside namespaces:

ping 192.168.0.2
PING 192.168.0.2 (192.168.0.2): 56 data bytes
ping: sendto: Network is unreachable
$ ping 192.168.201.2
PING 192.168.201.2 (192.168.201.2): 56 data bytes
ping: sendto: Network is unreachable

Forcing IP Has the same results

Pinging



So, there is no IP on Compute 1 as you can see on enp134s0f0 that correspond to the OAM 

Pinging using managment works good.

compute-0:~$ ping 10.10.60.32
PING 10.10.60.32 (10.10.60.32) 56(84) bytes of data.
64 bytes from 10.10.60.32: icmp_seq=1 ttl=64 time=0.133 ms
64 bytes from 10.10.60.32: icmp_seq=2 ttl=64 time=0.051 ms