ProxMox 3.2 does not correctly configure OVS, why and how to do it manually?

Question

Proxmox

Hello!
An old server and therefore old proxies! the new one is not even installed, God bless him, I need minimal functionality, in this version it is enough, but I ran into a situation through the panel, I can’t configure OVS, since I need Vlan, and as I understand it, only through it they can be set in the panel . normal linux bridege from the panel works well.
in general, there are two network cards in the server, one on Linux Bridge, the second OVS
At the moment, the config looks like this

spoiler

# network interface settings
allow-vmbr1 vlan_777
iface vlan_777 inet static
address 192.168.33.111
netmask 255.255.255.0
ovs_type OVSIntPort
ovs_bridge vmbr1
ovs_options tag=777
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet manual
allow-vmbr1 eth1
iface eth1 inet manual
ovs_type OVSPort
ovs_bridge vmbr1
auto vmbr0
iface vmbr0 inet static
address 192.168.33.200
netmask 255.255.255.0
gateway 192.168.33.1
bridge_ports eth0
bridge_stp off
bridge_fd 0
auto vmbr1
iface vmbr1 inet static
address 192.168.33.100
netmask 255.255.255.0
ovs_type OVSBridge
ovs_ports eth1 vlan_777

We reboot, and accordingly the network does not work, no pings, nothing, if you restart the network interface in ProxMox
, this is the error

[email protected]:~# ifdown vmbr1 && ifup vmbr1
ifdown: interface vmbr1 not configured
Cannot find device "vmbr1"
Failed to bring up vmbr1.

what he did, he tried.
I added these interfaces to the switch with my hands.
ovs-vsctl add-br vmbr1
ovs-vsctl add-port vmbr1 eth1
No errors after restart, but the network doesn't work either.
How to configure OVS. How to configure correctly on proxymox help