Good evening everyone,

I'm sitting here for several hours scratching my head was my issue is. On my 
Homelab I deciced to setup VLANs to seperate my network. My "homeserver" is one 
of this cheap Aliexpress Routers with 6 NICs (enp2s0 - enp7s0). I created one 
bridge vmbr0. Following settings are applied:


----- SNIP -----
auto lo
iface lo inet loopback

auto enp3s0
iface enp3s0 inet manual

iface enp5s0 inet manual

iface enp6s0 inet manual

iface enp7s0 inet manual

auto enp4s0
iface enp4s0 inet manual
        ovs_type OVSPort
        ovs_bridge vmbr0
        ovs_options vlan_mode=native-untagged tag=100 

auto enp2s0
iface enp2s0 inet manual
        ovs_type OVSPort
        ovs_bridge vmbr0
        ovs_options trunks=7,100,120

auto vlan100
iface vlan100 inet manual
        ovs_type OVSIntPort
        ovs_bridge vmbr0
        ovs_options tag=100

        ovs_mtu=1500
        address 10.10.100.55
        netmask 255.255.254.0

auto vlan120
iface vlan120 inet manual
        address 10.10.120.2/23
        gateway 10.10.120.1
        ovs_type OVSIntPort
        ovs_bridge vmbr0
        ovs_mtu 1500
        ovs_options tag=120

auto vmbr0
iface vmbr0 inet manual
        ovs_type OVSBridge
        ovs_ports enp4s0 enp7s0 vlan100 vlan120
        ovs_mtu 1500

----- SNAP -----

On the proxmox Host is one pfSense VM where the WAN interface is vtnet0.7 (VLAN 
ID 7 on vmbr0), this is needed to use my PPPoE dialin on VDSL. As you can see I 
have two VLANs, 100 and 120. So I was setting up the necessary Interfaces in 
pfSense. My internal VLAN should be 100, management 120. Every VLAN gets his 
own IPv6 /64 prefix from my provider. My working client is directly connected 
to enp4s0, thats why I set it that way up. Whats suprising me now is, that my 
working client not only get the v6 prefix from VLAN 100, it's getting from VLAN 
120 aswell the IPv6 adress. 

Is there any multicast setting or anything else that I'm missing? My VMs for 
example on VLAN Tag 120 gets only one IPv6 address. It's driving me crazy 😕

Thanks anyone for any help!

Cheers,
Stephan
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