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external bridge neutron

asked 2016-11-08 06:17:01 -0600

anonymous user



I'm configuring neutron and I wonder if it can see (and manage) addresses directly from eth0 interface, or do I need to create something like br.ext bridge, so neutron would manage multiple IPs by connecting another clients (tap0, tap1...) to that interface.

If both configurations are possible to create, I would like to ask you which one is better and why?

Thank you in advance for your reply :)

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answered 2016-11-08 18:17:28 -0600

updated 2016-11-08 18:18:51 -0600

If I am not totally wrong, the only solutions that allow you to connect a VM directly to an interface are PCI Passthrough and SRIOV, but they require special hardware.

Other than that, and assuming you use Libvirt to control your VMs (which most people do), a VM's network interface is represented by a TAP interface on the compute host that you must plug in somewhere. That "somewhere" is most often a bridge, either Openvswitch or Linuxbridge.

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answered 2016-11-08 23:11:42 -0600

the bridges give you a single manageable platform to reference when using multiple interfaces on multiple servers that may not all have the same amount (or name "em1") of the interfaces...

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Asked: 2016-11-08 06:17:01 -0600

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Last updated: Nov 08 '16