Ralph, thanks for the reply! Somehow the L2 Ip address got changed to 0.0.0.0. I didn't notice it, as it had been Ok earlier. As soon as it was put back in, both the ethernet connectivity and the POE returned (after a reboot).
As for the CXi that has no POE, but has ethernet connectivity on the ports 1-16, we discovered a loose / broken off part (small round cylinder thing) that must have been damaged when shipping between sites. Despite being in a protective hard case, and padded, the shipping was so rough that the power supply was completely loose from the back case (screw had come vibrated out I guess). It may have knocked off this other part when bouncing around loose. I have another CXi and will have to take them apart to see where the part came from. May be possible to solder it back on.
Thanks again!