You tried to use eth1, eth2, or eth3 for the Internet Settings (Dirty-line) but the link does not come up.
eth2 and eth3 should not be used. Refer to KB000025269.
1. To use eth1, ensure that the network cable is connected to the MAA's eth1 port.
2. Configure the Internet Settings (Dirty-line) under System Settings > Network and click "Save Internet Settings". This will activate the eth1 port.
Important : Ensure that the network cable is already connected to the MAA before you configure the Internet Settings (Dirty-line). Failing to do so might prevent the link from being established.