Dell Force10 S25-01-GE-24T FTOS 8.4.2.7 Command Line Reference Guide for E-Ser - Page 1390

www.dell.com | support.dell.com Syntax loopback {internal | line} To delete a loopback setting, use the no loopback {internal | line} command. Parameters internal line Enter the keyword internal to test the physical interface by sending incoming traffic back through the interface. Enter the keyword line to test connectivity to the network by sending incoming traffic back to the network. Defaults Not configured. Command Modes INTERFACE Usage Use the show config command in the INTERFACE mode to determine if the loopback command was Information configured. Related Commands show config Display the interface configuration. ppp authentication e Enable Challenge-Handshake Authentication Protocol (CHAP) and/or Password Authentication Protocol (PAP) authentication on the interface. Syntax ppp authentication {chap | chap pap | pap | pap chap} To remove all PPP authentication, enter no ppp authenticate. Parameters chap chap pap pap pap chap Enter the keyword chap to enable CHAP authentication only. Enter the keywords chap pap to enable CHAP on one side and PAP on the other. Enter the keyword pap to enable PAP authentication only. Enter the keywords pap chap to enable PAP on one side and CHAP on the other side. Defaults Not configured. Command Modes INTERFACE Usage Once you configure this command, the remote device must prove its identity before the FTOS sends Information traffic. The two authentication types differ slightly: • With CHAP authentication, the E-Series sends a challenge to the remote device, which must encrypt the response with a shared value and return it to the E-Series with a username. The E-Series checks the local database for a match on the shared value and username. • With PAP authentication, the remote device must send a username/password set which the FTOS checks against the local database. PAP passwords are sent as "clear text" and could be intercepted and used. 1390 | SONET