Symptom: A company intranet is a 100Mbps network that connects to the Internet via ADSL broadband. The ADSL modem is connected to the 10/100 Mbps switch, and the switch is then connected to the server. When the connection is good, the PPPoE protocol is not available to computers in the company intranet.
Failure analysis and exclusion: according to the symptom analysis, the PPPoE protocol may not be able to find the ADSL signal under the Mbps network, because the PPPoE protocol generally supports a Mbps network, and the Mbps is not good for the web. The 10/100mbps switch is then set to 10Mbps working speed, troubleshooting.