I have set up a simple network in Proxmox as follows: physical interface > bond0 (LACP) > vlan401 > vmbr401 > VM net1 (vrtio; untagged).
If I tcpdump any interfaces on the Proxmox side, I see broadcast/multicast/unicast packets. If I tcpdump inside the VM on net1 interface, I only see broadcast/multicast packets. There is no firewall active at all within Proxmox or inside the guest OS. This behavior is the same on multiple Linux guests of different distros. However, I do see unicast traffic on different VLANs below 255.
What am I missing?
Code:
auto enp6s0
iface enp6s0 inet manual
mtu 9000
auto bond0
iface bond0 inet manual
bond-slaves enp6s0
bond-miimon 100
bond-mode 802.3ad
bond-xmit-hash-policy layer2
mtu 9000
auto vmbr401
iface vmbr401 inet manual
bridge-ports vlan401
bridge-stp off
bridge-fd 0
mtu 9000
auto vlan401
iface vlan401 inet manual
mtu 9000
vlan-raw-device bond0If I tcpdump any interfaces on the Proxmox side, I see broadcast/multicast/unicast packets. If I tcpdump inside the VM on net1 interface, I only see broadcast/multicast packets. There is no firewall active at all within Proxmox or inside the guest OS. This behavior is the same on multiple Linux guests of different distros. However, I do see unicast traffic on different VLANs below 255.
What am I missing?
Last edited: