If the Network Interfaces icon in the Dashboard is not in green.
Go to Configuration->Interfaces->Data Wires
In Red (Critical)
If there is no wire configured, create one.
If there are wires configured but their interfaces are not in UP state, this most likely indicates that the interfaces are not Intel compatible: remove the wire and create a new one with both interfaces in pcap mode. This should place the interfaces in UP state, but with much lower throughput capacity (less than 1Gbps).
If there are wires configured, with interfaces in UP state but with the LINK down, there is a problem in the connection with the other equipment. Connect both interface ports to one another in a loop using a suitable cable/fiber.
If both interfaces are in up, then the problem is on the other equipment.
If the link is still down and optic ports are used, verify that the transceivers:
are Intel-compatible
are supported (see SupportedNetwork Cards for a list).
of the type required by the installation (e.g.,SFP+-LR in an installation with monomode fiber and SFP+-LR on the other side).
In Yellow (Notice)
If the wires that appear as down are supposed tobe with traffic, follow the steps of the previous section (Critical)
If the wires that appear as down are not in use and you want to remove the notice signal, you can delete the unused wires. Consider that changes in the wire configuration will stop the traffic for some seconds.
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