[ale] kvm port forwarding confusion, kindly help

[Michael B. Trausch]

On Wed, 2015-06-03 at 08:47 -0400, DJ-Pfulio wrote:
> I've never had consistent connectivity using the automatic-bridges
> created by
> KVM. In theory, they should be just as good as a manually created
> bridge, but in
> practice, that has NOT been my experience.  When it comes to
> networking and KVM,
> I do it all outside the VM, virt-manager, KVM, or/and qemu settings.
> 
> Manually creating a bridge makes the networking stable and all the
> VMs are on
> equal footing with the rest of the network devices. Treat them just
> like real
> physical hosts.
> 
> IMHO. IME, TNSTAAFL
My typical VMH setup includes libvirt and manually-configured bridge
for the virtual machines, for the same reason.  It's easier to create
them manually and simply register them with libvirt. Then, just attach
the correct VM to the correct bridge to get the intended result.
The "host only with VM network" setup is just "subnetwork without a
published inbound route", and I tend to prefer routing to the use of
bridges to tie VM segment into physical segment.
        — Mike
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