I'm experiencing this strange issue on one of my boxes.
My network is configured as follows:
I have VMs in the 192.168.0.130/25 attached to vmbr0.
When the VMs start, they would cause the host management network to lose connection.
The VMs themselves would also become unreachable.
If I split the host management from the VM bridge like so, this work as expected.
PowerEdge R6525
NIC NetXtreme BCM5720 2-port Gigabit Ethernet PCIe
Kernel 5.15.108-1-pve
Proxmox 7.4-16
My network is configured as follows:
auto eno1
iface eno1 inet manual
auto eno2
iface eno2 inet manual
auto bond0
iface bond0 inet manual
bond-slaves eno1 eno2
bond-miimon 100
bond-mode 802.3ad
bond-xmit-hash-policy layer2+3
auto vmbr0
iface vmbr0 inet static
address 192.168.0.131/25
gateway 192.168.0.129
bridge-ports bond0
bridge-stp off
bridge-fd 0
I have VMs in the 192.168.0.130/25 attached to vmbr0.
When the VMs start, they would cause the host management network to lose connection.
The VMs themselves would also become unreachable.
If I split the host management from the VM bridge like so, this work as expected.
auto eno1
iface eno1 inet manual
address 192.168.0.130/25
gateway 192.168.0.129
auto eno2
iface eno2 inet manual
auto vmbr0
iface vmbr0 inet static
bridge-ports eno2
bridge-stp off
bridge-fd 0
PowerEdge R6525
NIC NetXtreme BCM5720 2-port Gigabit Ethernet PCIe
Kernel 5.15.108-1-pve
Proxmox 7.4-16