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[neutron] "ext-net" appears in "Available networks" but is unusable

asked 2014-09-11 08:10:21 -0500


I have an (almost) working setup of icehouse using neutron with ml2 and openvswitch (vlan config). The working workflow to create an VM with network access is the following : use a tenant-net that has a router that is both switched to tenant-net and ext-net, and then assign it a floating IP (which comes from ext-net).

The workflow that doesn't work is : create a VM directly on ext-net, which is available in the "Launch instance" > "Networking" > "Available Networks". This VM then gets a floating IP which is pingable but no access is possible.

I've read that it is not recommended to launch VMs directly on ext-net, which seems ok, but why does this option appear in the dashboard (that my users will be using) ? Is this configurable ? Should I file a bug/feature request ?

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up on this question?

arthur.lutz gravatar imagearthur.lutz ( 2014-11-12 06:51:14 -0500 )edit

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answered 2014-09-12 07:45:07 -0500

gagarinq9 gravatar image

So you have two networks, one of them is tenant network, another is external (floating pool) network. So you can't be able use only external network for instance, although external network is available in network configuration of instance. Networking works in pair external network - tenant network and NAT between them. When you configure external network you set it up like 'gateway of router'.

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I agree, and this works, and if that is the case, I would just like to remove ext-net from the available networks to attach directly to a VM, but still be able to attach floating ips from it.

arthur.lutz gravatar imagearthur.lutz ( 2014-09-16 04:56:24 -0500 )edit

I also find this irritating! Would be nice to have a way to disable that!

rmart04 gravatar imagermart04 ( 2015-11-15 10:36:24 -0500 )edit

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Asked: 2014-09-11 08:10:21 -0500

Seen: 445 times

Last updated: Sep 11 '14