Windows VMs randomly lose network connectivity on Proxmox VE 8.2.2

[hnq]

Hello guys, I’m encountering an issue with my Windows VMs (Windows 10 and Windows Server 2012 R2) on Proxmox VE 8.2.2 The VMs randomly lose network connectivity after running for few days, requiring a restart to restore connectivity.

My current Proxmox configuration:

boot: order=ide0;ide2;net0
cores: 2
cpu: x86-64-v2-AES
ide0: local-lvm:vm-101-disk-0,size=40G
ide2: local:iso/Windows_Server_2012_R2x64.ISO,media=cdrom,size=5302784K
machine: pc-i440fx-8.1
memory: 8192
meta: creation-qemu=8.1.5,ctime=1741056903
name: ----
net0: virtio=BC:24:11:71:0B:BC,bridge=vmbr1,firewall=1
numa: 0
onboot: 1
ostype: win8
scsihw: virtio-scsi-single
smbios1: uuid=

Network configuration:
auto vmbr0
iface vmbr0 inet static
address ---/29
gateway ---
bridge-ports eno1
bridge-stp off
bridge-fd 0

auto vmbr1
iface vmbr1 inet static
address 192.168.100.1
netmask 255.255.255.0
bridge_ports none
bridge_stp off
bridge_fd 0
post-up echo 1 > /proc/sys/net/ipv4/ip_forward
post-up iptables -t nat -A POSTROUTING -s '192.168.100.0/24' -o vmbr0 -j MASQUERADE
post-down iptables -t nat -D POSTROUTING -s '192.168.100.0/24' -o vmbr0 -j MASQUERADE

VMs use static IPs:

• IP: 192.168.100.x
• Gateway: 192.168.100.1

Issue details:

• After running for a while (some time 4-5 day), VMs randomly disconnect from the network.
• Both Windows 10 and Windows Server 2012 experience the same issue.
• Restarting the VM temporarily resolves the issue.
• CPU/Memory resources are sufficient and not maxed out.
  

Has anyone encountered this issue or have suggestions on troubleshooting?

Thank you very much for your support!

 

[hnq]

can anyone help me?

 

[hnq]

upppp

 

[cwt]

What‘s in your syslog and did you check your Windows logs? Do you use any kind of „nasty“ NIC, Realtek for example?

Btw: „upping“ posts is not so polite as this is a volunteer forum.

 

[Foobars]

Can you try to switch from virtio-net to intel e1000? or reduce the mtu down to 1400