[Openstack] Tricky questions - 1/3 Quantum Network Object

Marco Fornaro Marco.Fornaro at huawei.com
Thu Oct 10 14:10:55 UTC 2013

Hi All,

Some Tricky questions I ask help for (email 1 of 3):

Quantum Network object
In the "openstack networking guide"->"Using Openstack compute with Openstack"->" Advanced VM creation" (http://docs.openstack.org/grizzly/openstack-network/admin/content/advanceed_vm_creation.html) there are example boot a VM on one or more NETWORKs (meaning the quantum Network object):
nova boot --image <img> --flavor <flavor> \
--nic net-id=<net1-id> --nic net-id=<net2-id> <vm-name>

BUT if you look at the description of the network object in the API abstraction it looks like a collection of subnets (meaning the quantum object), so basically a collection of IP Addresses like

SO (first question): what happens in the network where I boot the VM has more than a subnet?...I suppose the VM should have a nic for EACH subnet of the network!

THEN (second question): why do I need a network object? Shouldn't it be more practical to have just the subnet object?..why do I need to create a Network if it's just a collection of subnets?

Thanks in advance for any help

Best Regards


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