Hello everyone, In my test environment, I noticed that the default gateway for IPv6 is changed from 1 to 0, is this correct? Reproduce steps are: * openstack cli: openstack network create test-ipv6-net openstack subnet create --subnet-range 2001:db8::200:0/64 --ip-version 6 --ipv6-ra-mode dhcpv6-stateful --ipv6-address-mode dhcpv6-stateful --network test-ipv6-net test-ipv6-subnet # the gateway_ip in the output is 2001:db8::200: but 2001:db8::200:1 is the expected IP * neutron cli: neutron net-create test-v6 neutron subnet-create --name test-v6-subnet --ip-version 6 test-v6 2002:db8::200:0/64 # the gateway_ip in the output is 2001:db8::200: but 2001:db8::200:1 is the expected IP there are 3 versions of OpenStack I've tested, the results are: OpenStack Rocky: 2001:db8::200:1 OpenStack Train: 2001:db8::200:1 OpenStack Wallaby: 2001:db8::200: the virtual router will use the gateway ip for port, and some hardware networking sdn controller for neutron may not work.