basic neutron configuration questions

asked 2015-10-15 13:46:53 -0500

darren-wang gravatar image

updated 2015-10-15 13:48:38 -0500


VM's on our kilo platform won't ping through their gateways yet vm's in the same subnet can ping through each other.

Physically, I have 3 interfaces on my network node, used for external network(, management network( and tunnel network( I'm using OVS as plugin and our external IP is allocated and we only have several real external IP's.

Now I wonder what's the CIDR I should set for the external_network in neutron, should it be the real external network that our network node is on or it can be some self-defined network? And what's the CIDR of tenant networks, should them be in the form like 10.0.. due to my tunnel network configuration?

What I want is that 1. vm's in one subnet can connect to each other, 2. vm in different subnet connected with router can ping through each other, 3. vm's can get access to external network, 4. vm's can be accessed from external network.

Yet now only the first goal is achieved, and vm's in the subnet can not even ping through their gateway! The content in the installation guide seems useless for my environment, can someone help me to see my environment run? Thanks a lot!

edit retag flag offensive close merge delete


When creating the subnet, you can define any CIDR you want. To connect different VM networks together, you need to define a neutron router between them. Perhaps you can post the network topology from horizon?

Bernd Bausch gravatar imageBernd Bausch ( 2015-10-16 06:18:24 -0500 )edit