(Fault phenomenon: serious network congestion, serious packet loss when clients Ping each other, and the speed of campus network users accessing the Internet is very slow, or even unable to access. Detailed fault description: the whole campus network suddenly experienced network communication interruption, and internal users could not normally access the Internet. During the Ping packet test in the computer room, it was found that the response time of the central computer room client to the Ping packet of the central switch management address was long and there was random packet loss. The communication packet loss of the host computer room client to the secondary switch communication was more serious.
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