Remove IP addresses from NIC's. Then create and set ethernet bridge to automatically get an IP address via DHCP (or a similar configuration) in order to enable bridging and making the bridge act as a single NIC.
In case you need to renew your ip: (also useful when it comes to ordinary NIC's like eth0 / eth1).
sudo dhclient mybridge -r
sudo dhclient mybridge
And as always - Remember - Man is your best friend!
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