Description of problem: This issue is impacting only Windows instances. 1. VM client requests lease renewal every 12 hours 2. DNSmasq (DHCP Server) sends a DHCPNAK saying the lease is not found 3. Server drops connectivity briefly 4. VM client sends REQUEST/DISCOVER and gets a reply back, and connects back with the IP address Version-Release number of selected component (if applicable): dnsmasq-2.76-5.el7.x86_64 dnsmasq-utils-2.76-5.el7.x86_64 Windows instance reports: Your computer was not able to renew its address from the network (from the DHCP Server) for the Network Card with network address 0x00163E09B91E. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server
Looks like it could be https://bugs.launchpad.net/neutron/+bug/1806770 which hasn't been backported to OSP 10. Nate is investigating.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2019:3115