Learning OpenStack Networking - Third Edition

Flow rules for VLAN networks

In the following example, VLANs 40 and 42 represent two networks in the data center. Both VLANs have been trunked down to the controller and compute nodes, and Neutron networks have been configured that utilize those VLAN IDs.

On the physical switch, the necessary configuration to facilitate the networking described here will resemble the following:

vlan 40    name VLAN_40vlan 42    name VLAN_42interface Ethernet1/4    description Provider_Interface_eth2    switchport    switchport mode trunk    switchport trunk allowed vlan add 40,42    no shutdown 

When configured as a trunk port, the provider interface can support multiple VLAN networks. Traffic that enters physical interface eth2 is processed by the flow rules on the br-eth2