On Fri, 2016-03-04 at 10:19 +0000, Tim Coote wrote:
> Hullo
> 
> I’m starting to migrate my fedora stock to NetworkManager. In one
> particular test scenario, I tried to create a direct copy of the
> final machine configuration using NM and the old "systemctl start
> network” approach. The VMs are temporally separated (ie I spin up the
> old one save interrogation results about configuration; kill it and
> repeat with the new one).  The only differences between the two
> machines should be the hostnames (so that the puppet configuration
> knows them as different machines) and the mac addresses.
> 
> One inconsistency that I’ve found is that the NetworkManager cannot
> seem to spin up a tunnel unless the ipv4 addresses differ between the
> VMs. For the NM controlled VM, pulling apart the actual command run,
> I see:
> [code]
> nmcli con up uuid 4a341ad1-3e31-7ee8-82ee-2019bf995ad8
> <response>
> Error: Connection activation failed: No suitable device found for
> this connection.
> [/code]
> 
> where the uuid represents the sit1 device. However, on the same VM
> (either directly invoked or by turning off NM and running ifup sit1):
> [code]
> /etc/sysconfig/network-scripts/ifup-sit sit1
> [/code]
> 
> spins up the tunnel.
> 
> If I put the ‘copy’ VM on different IP address(es). NM seems happy to
> spin up the tunnel. Note that in both cases there are no conflicting
> computers/ip addresses on the network at the same time.
> 
> Am I (probabably) seeing the intended behaviour for NM - in which
> case I need to modify my testing approach - or do I need to dig
> further to confirm a bug?
> 
> tia

Hi,


which version of NetworkManager?

what gives
  nmcli connection show 4a341ad1-3e31-7ee8-82ee-2019bf995ad8
and how does the corresponding ifcfg-file look?
  cat /etc/sysconfig/network-scripts/ifcfg-*


Thanks,
Thomas

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