[SOLVED] Multiple Bridges on Single NIC

cowmoo32 · 05-30-2014, 09:48 AM

I have a machine that will host multiple virtual machines and I'm hoping to have a unique IP for each VM from a single NIC on the host. I successfully created a bridge with

Code:

# ifdown em1
# virsh iface-bridge eth0 br0
# ifup br0

and have a single guest connected to br0 with a unique IP but I'm not sure how to go about adding more virtual NICs for the other guests to use.

yenn · 05-30-2014, 01:20 PM

I'm not sure how exactly virsh iface-bridge command works, as I have never used that, but why don't you try another approach?

Let configure and activate bridge itself on OS startup and then configure you virtual machine(s) NIC to automatically join bridge. That way when you start virtual machine, it adds it's own NIC to bridge automatically (also set it's IP address and all that jazz...). I can't tell whether it is possible in your setup, because you didn't mention hypervizor you are going to use, but I guess it's worth a try.

I use this setup with KVM and it works like a charm.

cowmoo32 · 06-02-2014, 09:09 AM

^ That's exactly what I ended up doing. I thought I needed a virtual NIC on the host for each guest but the VM creates its own mac/NIC from the bridge automatically.