How to connect 2 open vswitch switches?

Question

ubuntu

I configured this manu ivirt-it.ru/open-vswitch-gre-tuneling That
is,
Node 1.
# ovs-vsctl add-br ovs-sw0
# ovs-vsctl add-port ovs-sw0 eth0
# ovs-vsctl add- port ovs-sw0 tun0
# ovs-vsctl set interface tun0 type=internal
# ifconfig tun0 192.168.1.151 netmask 255.255.255.0
Node 2.
# ifconfig tun0 192.168.1.152 netmask 255.255.255.0
Node 1.
# ovs-vsctl add-br is- br0
# ovs-vsctl add-port is-br0 tun1
# ovs-vsctl set interface tun1 type=internal
# ifconfig tun1 10.200.10.1 netmask 255.255.255.0
Node 2.
# ifconfig tun1 10.200.10.2 netmask 255.255.255.0
Node 1.
# ovs-vsctl add-port is-br0 gre0 -- set interface gre0 type=gre options:remote_ip=192.168.1.152
Host 2.
# ovs-vsctl add-port is-br0 gre0 -- set interface gre0 type=gre options: remote_ip=192.168.1.151
raised open vswitch on 2 virtual machines, set up a gre-tunnel, everything stopped pinging, both the world and each other virtual machines do not ping ....
How to be?