neutron

Instances alternative gateway / VLAN Tags

Asked by Christoph L

Hello All
I have two questions regarding Neutron:

1) In the documentation I always see diagrams where the network traffic from all the instances is routed through the network node. For example here: http://docs.openstack.org/icehouse/install-guide/install/yum/content/figures/3/figures/installguide_neutron-initial-networks.png

Is it possible to configure a different gateway for the instances that the gateway is the real physical router and skip the way through the network node?

2) If there are VLANs created in the physical switches is it possible to create this VLANs also in the OpenStack/Neutron environment to match the datacenter VLANs?

Thank you!

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Salvatore Orlando (salvatore-orlando) said : 		#1

Question #1:

Assuming that you're taking care of ensuring data plane connectivity between instance and the physical router, maybe you can just skip the neutron router at all.
Subnets will need to be configured with your phy router IPs address as gateway_ip.
Obviously you then won't be able to create floating IPs.

Question #2:
Yes, you can use the provider network extension to this aim - segmentation_id will have to match the datacenter vlan.

On a general note - Launchpad answers are now closed. It should not have been possible to submit a new question, but this is not the first time it happens... launchpad is weird at times.
For further questions, please use ask.openstack.org

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