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Assuming you have created Neutron Router between 10.0.5.0/24 ( tenant's) and 172.25.1.0/24 (external)
On Network Node issue commands

neutron router-list
ip netns | grep router_id
ip netns exec qrouter-<router_id> iptables -S -t nat

Your configuration will result neutron traffic like this, which seems a bit strange

Controller/Compute => Network=> Controller/Compute

In case VXLAN or GRE tunneling

ovs-ofctl dump-flows br-tun

on each one of nodes
In case VLAN been used for (vm/data) network

ovs-vsctl dump-flows br-ethX

which one was configured for (vm/data) network between nodes.

Assuming you have created Neutron Router between 10.0.5.0/24 ( tenant's) and 172.25.1.0/24 (external)
On Network Node issue commands

neutron router-list
ip netns | grep router_id
ip netns exec qrouter-<router_id> iptables -S -t nat

Your configuration will result neutron traffic like this, which seems a bit strange

Controller/Compute => Network=> Controller/Compute

In case VXLAN or GRE tunneling

ovs-ofctl dump-flows br-tun

on each one of nodes
In case VLAN been used for (vm/data) network

ovs-vsctl dump-flows br-ethX

br-ethX

which one was configured for (vm/data) network between nodes.

Assuming you have created Neutron Router between 10.0.5.0/24 ( tenant's) and 172.25.1.0/24 (external)
On Network Node issue commands

neutron router-list
ip netns | grep router_id
ip netns exec qrouter-<router_id> iptables -S -t nat

Your configuration will result neutron traffic like this, which seems a bit strange

Controller/Compute => Network=> Controller/Compute

In case VXLAN or GRE tunneling

ovs-ofctl dump-flows br-tun

on each one of nodes
In case VLAN been used for (vm/data) network

ovs-vsctl ovs-ofctl dump-flows br-ethX

which one was configured for (vm/data) network between nodes.