Hi, I'm running openstack control node and compute node on separate VMs. These two are running successfully but gre tunnel is not being established between these two VMs. The following results come when i checked

**sudo ovs-vsctl show
17074e89-2ac5-4bba-997a-1a5a3527cf56
    Manager "tcp:192.168.56.102:6640"
        is_connected: true
    Bridge br-ex
        Controller "tcp:192.168.56.102:6633"
            is_connected: true
        Port "tapa6c0ad02-5d"
            Interface "tapa6c0ad02-5d"
        Port br-ex
            Interface br-ex
                type: internal
    Bridge br-int
        Controller "tcp:192.168.56.102:6633"
            is_connected: true
        fail_mode: secure
        Port "tap44875ccc-d2"
            Interface "tap44875ccc-d2"
        Port br-int
            Interface br-int
                type: internal
    ovs_version: "2.3.0-git39ebb203"**

gre is missing here... And when i entered "sudo ovs-ofctl show br-tun" the it comes ovs-ofctl: br-tun is not a bridge or a socket I don't know much about these things please help me Thank you