#Address field in ppp frame software
This document is not restricted to specific software and hardware versions. For example, if you want to run PPP over ISDN, then all ISDN layers must be up otherwise PPP does not start. Note: PPP negotiation between two peers cannot start unless the lower layer (ISDN, physical interface, dial-up line, and so on) under PPP functions perfectly. Issue this command to enable Millisecond timestamps on the router: Router(config)# service timestamp debug datetime msecįor more information on debug commands, see Important Information on Debug Commands. Issue the encapsulation ppp command to accomplish this. PPP must be enabled on the interfaces on both routers. Readers of this document must ensure that these conditions are met: This document provides a comprehensive method to read debug ppp negotiation command output. However, it is imperative that you understand the debug ppp negotiation command output.
The debug ppp negotiation command enables you to view the PPP negotiation transactions, identify the problem or stage when the error occurs, and develop a resolution. A failure in the PPP negotiation between two routers causes the connection to fail. PPP allows two machines on a point-to-point communication link to negotiate various parameters for authentication, compression, and the Layer 3 (元) protocols, such as IP. In dial-related applications, PPP is the most commonly used encapsulation type.
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