We just ran into this exact issue after upgrading our openstack environment to victoria.
As our installation is running on version 17.4.1 I dont think that this is a duplicate of https://bugs.launchpad.net/neutron/+bug/1930414, same as stigtelfer said the fix for this bug is already applied in this version.
As we require ipv6 to be enabled we are at the moment evaluating a workaround to set the following sysctl values on our nodes that are hosting the dhcp namespaces:
net.core.devconf_inherit_init_net=1
net.ipv6.conf.default.accept_dad=0
As kamil-madac already mentioned this bug has very high impact as we are losing dhcp namespaces.
We just ran into this exact issue after upgrading our openstack environment to victoria.
As our installation is running on version 17.4.1 I dont think that this is a duplicate of https:/ /bugs.launchpad .net/neutron/ +bug/1930414, same as stigtelfer said the fix for this bug is already applied in this version.
As we require ipv6 to be enabled we are at the moment evaluating a workaround to set the following sysctl values on our nodes that are hosting the dhcp namespaces: devconf_ inherit_ init_net= 1 conf.default. accept_ dad=0
net.core.
net.ipv6.
As kamil-madac already mentioned this bug has very high impact as we are losing dhcp namespaces.