Hi,

I have a duel nic HP Microserver with Debian Stretch installed and i'm trying to configure it to use 5 vlans as follows:

NIC 1 - trunk (no IP)
- vlan10 (static ip)
- vlan20 (static ip)
- vlan30 (static ip)
- vlan40 (static ip)
- vlan50 (static ip)

Nic 2 - Management net (DHCP)


When I try to remove the IP from NIC 1, every vlan sub interface goes DOWN.

My interfaces file:

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
#allow-hotplug eno1
#iface eno1 inet dhcp

auto eno2
iface eno2 inet dhcp

auto vlan10
iface vlan10 inet static
vlan-raw-device eno1
address 192.168.10.3
netmask 255.255.255.0

auto vlan20
iface vlan20 inet static
vlan-raw-device eno1
address 192.168.20.3
netmask 255.255.255.0

...

I see you are using a rarely used method of adding VLANs.

Today when adding multiple IP Addresses to a single NIC people are using sub-interfaces

eno1 - main IP
eno1:10 - VLAN 10 IP
eno1:20 - VLAN 20 IP
and so on.