OSN 1500 SCC version: 22.214.171.124 report alarm“xxxx-OTHER” on several boards at same time.
T2000 version:V2R6C01 SPC001
We check communication between boards in subrack by Navigator command
:dmm-ping:0,0xff000000,bid,0,0,20,500,2000,500,2 , bid= PDH & SDH board ID of all the slots. The communication between boards was abnormal, ping can not pass.
Then we decide reset AUX board, but problem still exist. After that we replace AUX board and this alarms disappear.
1.Fault of subrack backplane.
2. AUX is abnormal.
3.Fault in mailbox.
4.Fault of the SCC.
From product manual we can know that intra-board communication for OSN product consists of the following two modes:
1. Two iIntra-board HDLC channels comply with the HDLC protocol.
2. One LAN switch channel.
Usually if some problems happen with intra-board communication, the root of this problems come from AUX board.