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Thanks a lot Jorge for the reply.

I sent an email but it may has some problem, so why I attached the 
output of the commands mentioned in a file.
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Thanks a lot Jorge for your response, these are the outputs:

ip netns exec qrouter-570a7359-1658-4ff4-8f0c-947e487ffc76 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 1  (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

qg-1fd409f8-91: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet XXXXXX.8  netmask 255.255.255.0  broadcast XXXXXX
        inet6 fe80::f816:3eff:fef7:a0db  prefixlen 64  scopeid 0x20<link>
        ether fa:16:3e:f7:a0:db  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 37  bytes 2082 (2.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

qr-5ac8cae0-61: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet 10.10.0.1  netmask 255.255.255.0  broadcast 10.10.0.255
        inet6 fe80::f816:3eff:fe3b:b19b  prefixlen 64  scopeid 0x20<link>
        ether fa:16:3e:3b:b1:9b  txqueuelen 1000  (Ethernet)
        RX packets 338  bytes 31394 (30.6 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 360  bytes 38637 (37.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

The main strange part is here: qg-1fd409f8-91: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet XXXXXX.8  netmask 255.255.255.0  broadcast XXXXXX

xxxx.8 strange IP it is not my network node IP.


And here are more outputs:

ip netns exec qrouter-570a7359-1658-4ff4-8f0c-947e487ffc76 iptables -L -n -v
Chain INPUT (policy ACCEPT 116 packets, 15374 bytes)
 pkts bytes target     prot opt in     out     source               destination        
  308 29294 neutron-l3-agent-INPUT  all  --  *      *       0.0.0.0/0            0.0.0.0/0          

Chain FORWARD (policy ACCEPT 6 packets, 504 bytes)
 pkts bytes target     prot opt in     out     source               destination        
    6   504 neutron-filter-top  all  --  *      *       0.0.0.0/0            0.0.0.0/0          
    6   504 neutron-l3-agent-FORWARD  all  --  *      *       0.0.0.0/0            0.0.0.0/0          

Chain OUTPUT (policy ACCEPT 342 packets, 32649 bytes)
 pkts bytes target     prot opt in     out     source               destination        
  342 32649 neutron-filter-top  all  --  *      *       0.0.0.0/0            0.0.0.0/0          
  342 32649 neutron-l3-agent-OUTPUT  all  --  *      *       0.0.0.0/0            0.0.0.0/0          

Chain neutron-filter-top (2 references)
 pkts bytes target     prot opt in     out     source               destination        
  348 33153 neutron-l3-agent-local  all  --  *      *       0.0.0.0/0            0.0.0.0/0          

Chain neutron-l3-agent-FORWARD (1 references)
 pkts bytes target     prot opt in     out     source               destination        
    6   504 neutron-l3-agent-scope  all  --  *      *       0.0.0.0/0            0.0.0.0/0          

Chain neutron-l3-agent-INPUT (1 references)
 pkts bytes target     prot opt in     out     source               destination        
  192 13920 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0            mark match 0x1/0xffff
    0     0 DROP       tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            tcp dpt:9697

Chain neutron-l3-agent-OUTPUT (1 references)
 pkts bytes target     prot opt in     out     source               destination        

Chain neutron-l3-agent-local (1 references)
 pkts bytes target     prot opt in     out     source               destination        

Chain neutron-l3-agent-scope (1 references)
 pkts bytes target     prot opt in     out     source               destination        
    0     0 DROP       all  --  *      qr-5ac8cae0-61  0.0.0.0/0            0.0.0.0/0            mark match ! 0x4000000/0xffff0000