# Revision history [back]

### Explain Quantum Network Configuration, like I'm 5

From the OpenStack Networking Guide

The suggested configuration for /etc/quantum/plugins/linuxbridge/linuxbridge_config.ini to implement a single public network with multiple VLAN tenant networks is:

[vlans]
tenant_network_type = vlan
network_vlan_ranges = physnet2:100:110

[linux_bridge]
physical_interface_mappings: physnet2:eth1


However it is not clear from this how the external network is defined. If amend the bridge section:

[linux_bridge]
physical_interface_mappings: physnet2:eth1,physnet3:eth1


This raises an execption in /var/log/quantum/server.log on startup. If I amend the vlan section:

[vlans]
tenant_network_type = vlan
network_vlan_ranges = physnet2:100:110,physnet1


This works, but it's not clear if I can set that physical network as having no VLAN range (I can still create a network with a --provider:network_type vlan...

Furthermore, I cannot add multiple physical_interface_mapping entries. E.g.

[linux_bridge]
physical_interface_mappings: physnet2:eth1,physnet3:eth2


Just makes everything unhappy.

 2 No.2 Revision smaffulli 6981 ●38 ●68 ●102 http://maffulli.net/

### Explain Quantum How to specify physical and external Network Configuration, like I'm 5Configuration in Neutron?

From the OpenStack Networking Guide

The suggested configuration for /etc/quantum/plugins/linuxbridge/linuxbridge_config.ini to implement a single public network with multiple VLAN tenant networks is:

[vlans]
tenant_network_type = vlan
network_vlan_ranges = physnet2:100:110

[linux_bridge]
physical_interface_mappings: physnet2:eth1


However it is not clear from this how the external network is defined. If amend the bridge section:

[linux_bridge]
physical_interface_mappings: physnet2:eth1,physnet3:eth1


This raises an execption in /var/log/quantum/server.log on startup. If I amend the vlan section:

[vlans]
tenant_network_type = vlan
network_vlan_ranges = physnet2:100:110,physnet1


This works, but it's not clear if I can set that physical network as having no VLAN range (I can still create a network with a --provider:network_type vlan...

Furthermore, I cannot add multiple physical_interface_mapping entries. E.g.

[linux_bridge]
physical_interface_mappings: physnet2:eth1,physnet3:eth2


Just makes everything unhappy.

 3 No.3 Revision darragh-oreilly 2220 ●6 ●23 ●41

### How to specify physical and external Network Configuration in Neutron?multiple interface mappings for LinuxBridge plugin?

From the OpenStack Networking Guide

The suggested configuration for /etc/quantum/plugins/linuxbridge/linuxbridge_config.ini to implement a single public network with multiple VLAN tenant networks is:

[vlans]
tenant_network_type = vlan
network_vlan_ranges = physnet2:100:110

[linux_bridge]
physical_interface_mappings: physnet2:eth1


However it is not clear from this how the external network is defined. If amend the bridge section:

[linux_bridge]
physical_interface_mappings: physnet2:eth1,physnet3:eth1


This raises an execption in /var/log/quantum/server.log on startup. If I amend the vlan section:

[vlans]
tenant_network_type = vlan
network_vlan_ranges = physnet2:100:110,physnet1


This works, but it's not clear if I can set that physical network as having no VLAN range (I can still create a network with a --provider:network_type vlan...

Furthermore, I cannot add multiple physical_interface_mapping entries. E.g.

[linux_bridge]
physical_interface_mappings: physnet2:eth1,physnet3:eth2


Just makes everything unhappy.