Proxmox 7 Openvswitch Bridged setup for /29 Subnet (Hetzner)


Well-Known Member
Mar 3, 2013
my test location
  1. How do i setup a /29 Subnet (Hetzner) with Proxmox to be useable via guests (1 IP per Guest)?
  2. Can i use only 6 or all 8 IP's ? Do i need to use Point-to-Point setup for all 8 as the Hetzner Guide suggests ?

  1. Open vSwitch based bridges
  2. only experienced with Hetzner's single IP's that requier a Mac to be assigned by Hetzners Robot.
  3. Network device is: enp7s0
  4. Main IP is : AA.BB.CC.180/26
  5. Main IP's gateway is AA.BB.CC.129/29
  6. Subnet is : KK.LL.MM.40/29
  7. Subnets Gateway is: AA.BB.CC.180/26

In my attempts the closest i have come is to get the IP's to ping is by adding a separate bridge to the Server for each subnet. I seem to have trouble assigning the IP's to the guest.

current network config:
root@entry-3:/# cat /etc/network/interfaces
# network interface settings; autogenerated
# Please do NOT modify this file directly, unless you know what
# you're doing.
# If you want to manage parts of the network configuration manually,
# please utilize the 'source' or 'source-directory' directives to do
# so.
# PVE will preserve these directives, but will NOT read its network
# configuration from sourced files, so do not attempt to move any of
# the PVE managed interfaces into external files!

auto lo
iface lo inet loopback

auto enp7s0
iface enp7s0 inet manual
        ovs_type OVSPort
        ovs_bridge vmbr0
# Server Network Card

auto vmbr0
iface vmbr0 inet static
        address AA.BB.CC.180/26
        gateway AA.BB.CC.129
        ovs_type OVSBridge
        ovs_ports enp7s0
# Server Network Bridge

auto vmbr41
iface vmbr41 inet static
        address KK.LL.MM.41/29
        ovs_type OVSBridge
#Separate Subnet Bridge

auto vmbr42
iface vmbr42 inet static
        address KK.LL.MM.42/29
        ovs_type OVSBridge
#Separate Subnet Bridge

auto vmbr43
iface vmbr43 inet static
        address KK.LL.MM.43/29
        ovs_type OVSBridge
#Separate Subnet Bridge

auto vmbr44
iface vmbr44 inet static
        address KK.LL.MM.44/29
        ovs_type OVSBridge
#Separate Subnet Bridge

auto vmbr45
iface vmbr45 inet static
        address KK.LL.MM.45/29
        ovs_type OVSBridge
#Separate Subnet Bridge

auto vmbr46
iface vmbr46 inet static
        address KK.LL.MM.46/29
        ovs_type OVSBridge
#Separate Subnet Bridge

my attempts sofar all resulted from hetzners guides here:
With IPv4, the network and broadcast addresses are normally reserved. Based on the above example, that would be the IPs <> and <>. You may use these addresses as a secondary IP or as part of a point-to-point setup. As a result, in a /29 subnet, all 8 IPs are usable, rather than just 6.
I guess i so far have used 6 out of 8 IP's as a "secondary IP" for the host.
Last edited:


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