Learning OpenStack Networking - Third Edition

Sending traffic from an instance with a floating IP

Imagine a scenario where a floating IP, 10.30.0.107, has been assigned to the green VM represented in the following diagram:

When the green virtual machine instance at 172.24.100.6 sends traffic to an external resource, it first arrives at the local qrouter namespace:

Source MAC	Destination MAC	Source IP	Destination IP
Green VM	Green qr interface	Green VM Fixed IP (172.24.100.6)	8.8.8.8 (Google DNS)

When traffic arrives at the local qrouter namespace, the routing ...