Hi, This is "normal". You can have many subnets (both IPv4 and IPv6 in the one network). By default Neutron will associate to the port IP address only from one subnet of one type (IPv4/IPv6) but You can change it and tell Neutron to allocate for the port IP adresses from more than one subnet. If You have both IPv4 and IPv6 subnets in the network, Neutron will by default allocate one IPv4 and one IPv6 to each port. But again, You can manually tell Neutron to use e.g. only IPv6 address for specific port. Please check [1] and [2] for more details. [1] https://docs.openstack.org/neutron/latest/admin/intro-os-networking.html [2] https://docs.openstack.org/api-ref/network/v2/ W dniu 01.08.2020 o 23:36, Anil Jangam pisze:
Hi,
I have observed that one can create two subnets under the same network scope. See below an example of the use case.
[image: Screen Shot 2020-08-01 at 2.22.15 PM.png] Upon checking the data structures, I saw that the segment type (vlan) and segment id (55) is associated with the "network" object and not with the "subnet" (I was under impression that the segment type (vlan) and segment id (55) would be allocated to the "subnet").
When I create the VM instances, they always pick the IP address from the SUBNET1-2 IP range. If the segment (vlan 55) is associated with "network" then what is the reason two "subnets" are allowed under it?
Does it mean that VM instances from both these subnets would be configured under the same VLAN?
/anil.
-- Slawek Kaplonski Principal software engineer Red Hat