Problem description

In the opening of a bureau, an engineer finds that the interface board SSN1D12S of the SSR2PD1 single board of an OSN1500B device is in and out of position on the network management. The interface board cannot be queried by using :cfg-get-phybd to query the physical board, but it can be queried by using :cfg-get-board.

The board configuration is as follows: a R1PD1 board is configured in slot 7, and the interface board D12S is inserted in slot 15; a SSN1EFT8 board is also configured in slot 12, and the interface board SSN1ETF8 is configured.

Host version: 5.36.18.44P01

Alarm message

The interface board shows no presence, no alarms and no abnormal events.

Processing

1. Firstly, I pulled a good interface board from other network elements, and the problem still exists after replacing it.

2、Confirmed that there is no problem with this board configuration, and the engineer also feedback that another OSN 1500B device did not change the problem, the version is: 5.36.17.44P01.

3, confirmed that the software problem, the interface board up and down the line is the host software regularly to the processing board to query the status of its interface board, but the software processing problems. Data board EFT8 in the receipt of the host query interface board status, the number of reported more than one, more of this is an empty board type, so the host processing will be 15 slots offline, and the host query the interface board status of the 7th board, and will be 15 slots on the line, so that the cycle of processing led to the 15 slots can not be on line.

Root Cause

The problem can be reproduced after configuring according to the current network version. The lab reproduces the interruption point and finds out that it is because the data veneer board returns an extra null type to the master for the board type.

Recommendations and Summary

1, this problem will not affect the business, and there is no alarm and abnormal events reported, but only when you open the slot installation diagram, you will see the interface board is bright and gray.

2. R&D plans to release the latest version of R8 in November to solve this problem.

3, if the problem occurs in the current network, you can use the method of adjusting the slot configuration of the current network to circumvent the problem. Or the network element downgrade to 5.36.17.44P01 version or R3 version to use.