LAN problems with portable WiFi

Recently, the office network of local area network is always a problem, the sudden delay is very high, suddenly dropped packets is very serious. Through the packet capture data analysis, it is during this time that a large number of unicast packets in the LAN are caused by flooding.

Why is unicast packets flushed across the network in broadcast mode?

Grab Bag

Analysis

Test

Investigation

After a series of actions, finally through the traffic monitoring found that in this time, one end of the outgoing packet, and then by the switch FFFF to all interfaces.

Decisively down this interface.

continue to observe.

Problem solving.

Troubleshoot the cause of the problem. Find a Xiaomi WiFi on this port notebook. Uninstall, clean up the registry.

Up interface, continue to observe.

So far, the abnormal imagination has not appeared again!

LAN problems with portable WiFi