display communication-channel from NE40, you can find some IPC channel status is abnormal
Slot# Curr-Chan/Status Slave-Chan/Status Switch number
1 IPC_B/Normal IPC_A/Abnormal 4
%Jun 15 12:12:22 2006 rdg2-rpr4-pe1 SRM/1/DEMFail:Slot 2 DEM channel 2 failed!
1. "display communication-channel" to check current status.
2. "switch communication-channel ipc" to change current abnormal channel to Slave status.
3. enter diag mode.
4. "set sru memory 6 fe00a000 1 ef" "set sru memory 6 fe00a000 1 ff" to reset DEM channel. "6" equal to Main MPU slot number, "1" equal to LPU slot number.
5. then "display communication-channel", you can find that IPC channel status is normal.
Communication between MPU and LPU is basd on normal DEM channel. It is important to maintain both current and slave DEM channel working well.
Just give a solution to resolve to DEM channel abmornal problem.