During the opening phase of the project engineering,the cross board ofHuaweiOSN3500Optical Transceiverequipmentat each bureau pointisN1SXCSA, but by querying the logic board of each equipment through the network management, some bureau points show that the cross board isN1EXCSA. Sincethe low-order cross capacity ofN1EXCSAis lower than thatof N1SXCSA, it will lead to failure of issuing low-order cross services for part of this equipment. The possible causes are as follows:

(1) It is caused by not querying the physical veneer at the beginning of the opening, but adding the veneer manually.

(2) Mismatched host versions.

(3) HuaweiOSN3500deviceSXCXAveneer failure.

The specific operation steps for the above reasons are as follows:

(1) Query the network management operation records, the beginning of the opening is completed by querying the physical board position and checking the opening, not added manually.

(2) query cross-board single board software for:7.11, host software for5.21.18.12, version matching.

(3) the network management of the main and backup cross boardEXCSAfor reversal test, reversal normal.

(4) Deletethe 10-slot standby cross-boardonHuaweiOSN3500and manually add it asSXCSA, and the main control board alarm shows:WRG_BD_TYPE, andthe10-slot alarm shows: the installed veneer is inconsistent with the actual veneer.

(5) Soft resetthe 10-slotSXCSAveneer, the veneer works normally.

(6) Reverse the master and standby, and refer to steps4and5to completethe addition operation of theSXCSAveneerin the master slot.

HuaweiOSN3500DeviceN1SXCSASingle Board Compatible Replacement FunctionThe logical board type can be configured asN1SXCSA,N1EXCSA, orN1UXCSAinthe host versions ofV100R006,V100R007, and later, andasN1EXCSAorN1UXCSAin the host versions beforeV100R006.