unable to create overlay network using OVS

[faridz88]

I am using OVS and gre tunnel (or maybe VXLAN) to create an overlay network so that VMs on different hosts and separate networks can have access to each other on a private network. (10.x.x.x)
With my configuration, two VMs on two nodes are unable to ping each other.
my /etc/network/interfaces configuration is like the following:

auto vmbr0
allow-ovs vmbr0
iface vmbr0 inet manual
    ovs_type OVSBridge
    ovs_ports eth0

auto eth0
allow-ovs eth0
iface eth0 inet static
   ovs_bridge vmbr0
   ovs_type OVSPort
    address 192.168.1.10
    network 255.255.255.0
    gateway 192.168.1.1

auto vmbr1
allow-ovs vmbr1
iface vmbr1 inet static
    ovs_ports gre1
    address 10.1.1.10
    netmask 255.255.255.0

auto gre1
allow-vmbr1 gre1
iface gre1 inet manual
    ovs_type OVSTunnel
    ovs-bridge vmbr1
    ovs_tunnel_type gre
    ovs_tunnel_options options:remote_ip=192.168.195.20 options:key=1

I am using the same configuration on the other node with different IP addresses.
I would be appreciated if anyone can help me.

 

[stefws]

Why make an overlay instead just vlan tag VM NICs and connect VMs to vmbr0 and let them use whatever IP range they need?