Whether such configuration KVM VM is possible: 8 virtual network cards and 8th real IP addresses through vmbr0, and 9 virtual network cards connected with addresses in a private network of the host-server.
The variant from 7 virtual network cards connected with addresses in a private network of the host-server works if to specify two more cards they are not visible in a configuration of the virtual machine. In the virtual machine are visible 7+7=14 network cards. Probably, there is a restriction on their quantity?
VM Configuration: vlan0 => vmbr0, vlan101..109 => vmbr101..109
# Internet IP
vlan0: \
virtio=00:50:56:00:01:F6, \
virtio=00:50:56:00:01:F8, \
virtio=00:50:56:00:02:98, \
virtio=00:50:56:00:01:F9, \
virtio=00:50:56:00:01:FA, \
virtio=00:50:56:00:01:F7, \
virtio=00:50:56:00:02:99, \
virtio=00:50:56:00:01:FB
# Private network IP
vlan101: virtio=6A:8A:12:C1:ED:50
vlan102: virtio=86:A1:E0:43:5F:23
vlan103: virtio=3A:1F:B5:35:CF:7D
vlan104: virtio=dA:78:E4:07:F9:16
vlan105: virtio=82:4B:3E:43:24:9F
vlan106: virtio=2E:F2:7A
1:A3:39
vlan107: virtio=9A:63:18:79:33:25
vlan108: virtio=2A:ED:FC:16:43:40
vlan109: virtio=8E:65:2F:6D:F7:8D
Proxmox server configuration:
auto vmbr0
iface vmbr0 inet static
address 188.40.xxx.xxx
netmask 255.255.255.192
gateway 188.40.xxx.xxx
broadcast 188.40.xxx.xxx
bridge_ports eth0
bridge_stp off
bridge_fd 0
#VLAN 101
auto eth1.101
iface eth1.101 inet manual
auto eth2.101
iface eth2.101 inet manual
auto bond101
iface bond101 inet manual
slaves eth1.101 eth2.101
bond_miimon 100
bond_mode active-rr
pre-up ifup eth1.101 eth2.101
post-down ifdown eth1.101 eth2.101
auto vmbr101
iface vmbr101 inet static
address 10.101.0.2
netmask 255.255.0.0
bridge_ports bond101
bridge_stp off
bridge_fd 0
...
#VLAN 109
auto vmbr109
iface vmbr109 inet static
address 10.109.0.2
netmask 255.255.0.0
bridge_ports bond109
bridge_stp off
bridge_fd 0
The variant from 7 virtual network cards connected with addresses in a private network of the host-server works if to specify two more cards they are not visible in a configuration of the virtual machine. In the virtual machine are visible 7+7=14 network cards. Probably, there is a restriction on their quantity?
VM Configuration: vlan0 => vmbr0, vlan101..109 => vmbr101..109
# Internet IP
vlan0: \
virtio=00:50:56:00:01:F6, \
virtio=00:50:56:00:01:F8, \
virtio=00:50:56:00:02:98, \
virtio=00:50:56:00:01:F9, \
virtio=00:50:56:00:01:FA, \
virtio=00:50:56:00:01:F7, \
virtio=00:50:56:00:02:99, \
virtio=00:50:56:00:01:FB
# Private network IP
vlan101: virtio=6A:8A:12:C1:ED:50
vlan102: virtio=86:A1:E0:43:5F:23
vlan103: virtio=3A:1F:B5:35:CF:7D
vlan104: virtio=dA:78:E4:07:F9:16
vlan105: virtio=82:4B:3E:43:24:9F
vlan106: virtio=2E:F2:7A
1:A3:39vlan107: virtio=9A:63:18:79:33:25
vlan108: virtio=2A:ED:FC:16:43:40
vlan109: virtio=8E:65:2F:6D:F7:8D
Proxmox server configuration:
auto vmbr0
iface vmbr0 inet static
address 188.40.xxx.xxx
netmask 255.255.255.192
gateway 188.40.xxx.xxx
broadcast 188.40.xxx.xxx
bridge_ports eth0
bridge_stp off
bridge_fd 0
#VLAN 101
auto eth1.101
iface eth1.101 inet manual
auto eth2.101
iface eth2.101 inet manual
auto bond101
iface bond101 inet manual
slaves eth1.101 eth2.101
bond_miimon 100
bond_mode active-rr
pre-up ifup eth1.101 eth2.101
post-down ifdown eth1.101 eth2.101
auto vmbr101
iface vmbr101 inet static
address 10.101.0.2
netmask 255.255.0.0
bridge_ports bond101
bridge_stp off
bridge_fd 0
...
#VLAN 109
auto vmbr109
iface vmbr109 inet static
address 10.109.0.2
netmask 255.255.0.0
bridge_ports bond109
bridge_stp off
bridge_fd 0
