Operation Manual – PortalH3C S7500E Series Ethernet Switches Chapter 1 Portal Configuration1-20[Switch] quit# Configure the IP address of the interface connected with the portal server.[Switch] interface vlan-interface 2[Switch–Vlan-interface2] ip address 192.168.0.100 255.255.255.01.9 Troubleshooting Portal1.9.1 Inconsistent Keys on the Access Device and the Portal ServerI. SymptomWhen a user is forced to access the portal server, the portal server displays neither theportal authentication page nor any error message. What the user sees is a blank webpage.II. AnalysisThe keys configured on the access device and the portal server are inconsistent,causing CHAP message exchange failure. As a result, the portal server does notdisplay the authentication page.III. Solutionz Use the display portal server command to display the key for the portal server onthe access device and view the key for the access device on the portal server.z Use the portal server command to modify the key on the access device or modifythe key for the access device on the portal server to ensure that the keys areconsistent.1.9.2 Incorrect Server Port Number on the Access DeviceI. SymptomAfter a user passes the portal authentication, you cannot force the user to log out byexecuting the portal delete-user command on the access device, but the user can logout by using the disconnect attribute on the authentication client.II. AnalysisWhen you execute the portal delete-user command on the access device to force theuser to log out, the access device actively sends a REQ_LOGOUT message to theportal server. The default listening port of the portal server is 50100. However, if thelistening port configured on the access device is not 50100, the destination port of theREQ_LOGOUT message is not the actual listening port on the server. Thus, the portalserver cannot receive the REQ_LOGOUT message. As a result, you cannot force theuser to log out the portal server.
