Avaya Configuring PPP Services Manual do Utilizador Página 33

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PPP Concepts
117360-A Rev. A 2-7
Figure 2-2 demonstrates how a PPP interface initializes.
Figure 2-2. Initializing the PPP Interface
Router A Router B
PPP0002A
1. PPP interface comes alive on network; begin LCP negotiations:
2. LCP opened; begin authentication phase, PAP or CHAP:
3. Authentication complete; begin NCP negotiations:
4. NCP open; begin transmitting data:
Send Configure-Request
Send Authenticate-Request
Send Authenticate-ACK
Send Configure-Request
Send Configure-ACK
Send Configure-ACK
Send Configure-ACK
Send Configure-Request
Send Configure-Request
Send Configure-ACK
PAP* CHAP*
Challenge
Response
Response Match
*Shows Router A initating authentication. Router B can also initiate authentication.
Send Data
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