Maybe a follow up from T304316. Cable seems unplugged on the fpc7 side.
fpc5: -------------------------------------------------------------------------- Interface Type Trunk Status Speed Neighbor or ID (mbps) ID Interface PIC / Port [...] 1/1 Configured -1 Down 40000 fpc7: -------------------------------------------------------------------------- Interface Type Trunk Status Speed Neighbor or ID (mbps) ID Interface PIC / Port [...] 0/51 Configured Absent