Hetzner Proxmox Host with bridge problem

[ecarry]

hello

I have a strange problem with my proxmox host since the last update. (pve 6.2-11)

my proxmox server is hosted by hetzner with a number of vm.
I use additional ip and one additional subnet.
Since the last update, one of the vm in the subnet loses the network through the bridge when there is too much network traffic towards this vm (like loading a web page)
Before, I see with ping or traceroute the ip address of the vm, after, I see the public ip of the proxmox host.
This only happens with this vm

In which direction to look? in which log file?

I post some data below

/etc/network/interfaces from proxmox host

[....]

auto enp2s0
iface enp2s0 inet static
  address xx.xx.xx.xx
  netmask 255.255.255.255
  pointopoint yy.yy.yy.yy
  gateway yy.yy.yy.yy
 
[... ipv6 ...]

[... vmbr1 for additional IPs ...]

auto vmbr0
iface vmbr0 inet static
  address zz.zz.zz.zz
  netmask 255.255.255.248
  bridge_ports none
  bridge_stp off
  bridge_fd 0

/etc/network/interfaces from vm

[...]

auto eth0
allow-hotplug eth0
iface eth0 inet static
        address tt.tt.tt.tt
        netmask 255.255.255.248
        gateway zz.zz.zz.zz

root@chuck ~ # bridge fdb|grep 102
xx:xx:xx:xx:xx:xx dev tap102i0 master vmbr0
yy:yy:yy:yy:yy:yy dev tap102i0 vlan 1 master vmbr0 permanent
yy:yy:yy:yy:yy:yy dev tap102i0 master vmbr0 permanent
zz:zz:zz:zz:zz:zz dev tap102i0 self permanent

xx:xx:xx:xx:xx:xx is the mac addess of the vm
yy:yy:yy:yy:yy:yy is the mac address of tap102i0
zz:zz:zz:zz:zz:zz is one of the mac address of vmbr0

The first line disappears after the lost of network
Restarting the vm restores the network for this vm

 

[wolfgang]

Hi,

does the network come back if you produce outgoing traffic in the CT?
E.g. ping 8.8.8.8