Problem description

The customer uses OSN3500 to turn on the one-way ASON service of Radio and Television, version 5.21.17.31, silver level tunnel service + SNCP service.

After the AOSN service is opened, the ATM service of large customers of Agricultural Bank of China is cut into the network, and the data service is tested, and it is found that the delay is too large. When using the original network, the delay is about 6MS, and after using the existing ASON network, the test found that the delay is about 20MS.

Alarm messages

In the customer's test using Cisco router, the latency is found to be 20MS, and the original network latency is about 6MS.

Processing

1. Tested with Huawei routers, the results are the same, excluding the Cisco router itself;

2, because many offices use IDQ1 single board, and the same networking mode, just different routes, so to rule out single board failure causes;

3, due to the different routes caused by the way of networking, so change the route, found that the delay will be a little change, but is still about 17MS, the delay is still a big difference compared with the original;

4、According to the existing network configuration, analyze the data, change the existing configuration, remove the IMA function, test, the delay is reduced by 6MS or 8MS. the cause of the problem is due to the opening of the IMA function.

Root cause

1. AOSN equipment networking problems;

2. IDQ1 board problem;

3. Cisco router problem;

4, data configuration problems.

Recommendations and Summary

The cause of the problem is caused by the addition of the IMA feature to the Data Configuration feature.

Recommendations:

1. After the network changes and failures or problems occur, the first thing to do is to find out the differences between the original network and the current network in terms of data configuration.

2. The negative impact of each function of the product should be considered in the program.

3, it is recommended that the company in the IDQ1 opening guidance to add this function will increase the delay after the opening of the instructions.