We recently connected a new E3 Link of 8Mbps on to our 2800 series router. We added 4 port FE on this router. The link is through. When I try to assign IP address I am getting following error.
% IP addresses may not be configured on L2 links
How to fix up this issue ?
Thanks in advance.
The additional information that you provide is helpful. I am still puzzled how you connect an E3 on a FastEthernet interface. I assume that the FastEthernet is connected to some device that is translating between E3 and Ethernet transports. If so that helps explain what is going on. As long as the FastEthernet on your router is receiving link (from whatever it is connected to) it will maintain the interface as UP. It does not matter what is happening on the other end of the connection, if the interface has link it will be UP.
If you are concerned to know whether there is a failure at the other end of the connection then I believe that you should look into the Enhanced Object Tracking feature. This link should have information to help you get started with this: