Comment 1 for bug 1845603

Thank you for your bug report!

Could you please describe exactly what you're doing that leads to packet loss? The configuration and the commands issued (where, what). The OpenStack version you use. While Neutron is far from bug-free, using vlans and tunneled networks together is such a basic use case it's hard to believe we could have broken it without the CI catching it. So I suspect some missing configuration or maybe a usage misunderstanding. But of course it can be a real bug - in that case please let us know how to reproduce it.

Also are you familiar with these configuration settings?

https://docs.openstack.org/neutron/stein/admin/config-mtu.html