The surprising reason why it did not recover even after replacing the broken equipment that does not connect to the Internet

There are many times when network equipment breaks down and causes trouble. For example, if a LAN switch breaks down, it may cause abnormal packets to flow, or it may not be possible to relay packets correctly. In order to deal with such problems, it is important to properly isolate the location of the occurrence and investigate the cause.

However, if multiple network devices fail at the same time, it becomes difficult to isolate where the problem occurred. The probability of encountering this is low, but if you are a network administrator, it is an event that you want to keep in the back of your mind. Here is an example of such a problem. Let's see the way to the solution.

The person who ran into trouble was Mr. Toru Oshima, who is the facility manager at Yuyu Home, a special nursing home for the elderly run by the social welfare corporation Minano Fukushikai. Utilizing his experience as a system engineer, Mr. Oshima is also in charge of managing Yuu Yu Home's network, computers, and other equipment.

At Minano Fukushikai, Yuyu Home and Ohama Care Center, a complex nursing care facility, are connected via Internet VPN.

In addition, Yuyu Home is promoting the use of IT, and is using cloud services to record the health status of residents. Employees use computers and smartphones to access the cloud service via the facility's wireless LAN, etc., and enter the necessary information.

The trouble occurred around 2:00 pm on July 3, 2021. Mr. Oshima, who was out on holiday, received a report from a facility employee using a business chat tool. "I can't connect to the internet from the facility network."

As mentioned above, Yuyu Home uses a cloud service, so if you can't connect to the Internet, it will hinder your business. Although Mr. Oshima was on holiday, he decided to try to solve the problem.

This article is for paid members only. Please log in or apply on the next page.

Next page Instruction to reboot from outside