Datasheet

Lab – Configuring Basic PPP with Authentication

.Jun 20 05:25:26.229: Se0/0/0 PPP: Session handle[6000009C] Session id[145]

.Jun 20 05:25:26.229: Se0/0/0 LCP: Event[OPEN] State[Initial to Starting]

.Jun 20 05:25:26.229: Se0/0/0 LCP: O CONFREQ [Starting] id 1 len 15

.Jun 20 05:25:26.229: Se0/0/0 LCP: AuthProto CHAP (0x0305C22305)

.Jun 20 05:25:26.229: Se0/0/0 LCP: MagicNumber 0x74385C31 (0x050674385C31)

.Jun 20 05:25:26.229: Se0/0/0 LCP: Event[UP] State[Starting to REQsent]

.Jun 20 05:25:26.229: Se0/0/0 LCP: I CONFREQ [REQsent] id 1 len 10

.Jun 20 05:25:26.229: Se0/0/0 LCP: MagicNumber 0x8D920101 (0x05068D920101)

.Jun 20 05:25:26.229: Se0/0/0 LCP: O CONFACK [REQsent] id 1 len 10

.Jun 20 05:25:26.229: Se0/0/0 LCP: MagicNumber 0x8D920101 (0x05068D920101)

.Jun 20 05:25:26.229: Se0/0/0 LCP: Event[Receive ConfReq+] State[REQsent to ACKsent]

.Jun 20 05:25:26.233: Se0/0/0 LCP: I CONFACK [ACKsent] id 1 len 15

.Jun 20 05:25:26.233: Se0/0/0 LCP: AuthProto CHAP (0x0305C22305)

.Jun 20 05:25:26.233: Se0/0/0 LCP: MagicNumber 0x74385C31 (0x050674385C31)

.Jun 20 05:25:26.233: Se0/0/0 LCP: Event[Receive ConfAck] State[ACKsent to Open]

.Jun 20 05:25:26.261: Se0/0/0 PPP: Phase is AUTHENTICATING, by this end

.Jun 20 05:25:26.261: Se0/0/0 CHAP: O CHALLENGE id 1 len 28 from "Central"

.Jun 20 05:25:26.261: Se0/0/0 LCP: State is Open

.Jun 20 05:25:26.265: Se0/0/0 LCP: I TERMREQ [Open] id 2 len 4

.Jun 20 05:25:26.265: Se0/0/0 PPP DISC: Received LCP TERMREQ from peer

.Jun 20 05:25:26.265: PPP: NET STOP send to AAA.

.Jun 20 05:25:26.265: Se0/0/0 PPP: Phase is TERMINATING

.Jun 20 05:25:26.265: Se0/0/0 LCP: O TERMACK [Open] id 2 len 4

.Jun 20 05:25:26.265: Se0/0/0 LCP: Event[Receive TermReq] State[Open to Stopping]

.Jun 20 05:25:26.265: Se0/0/0 PPP: Sending cstate DOWN notification

.Jun 20 05:25:26.265: Se0/0/0 PPP: Processing CstateDown message

.Jun 20 05:25:26.265: Se0/0/0 LCP: Event[CLOSE] State[Stopping to Closing]

.Jun 20 05:25:26.265: Se0/0/0 LCP: Event[DOWN] State[Closing to Initial]

.Jun 20 05:25:26.265: Se0/0/0 PPP: Phase is DOWN

Explain what is causing the link to terminate. Correct the issue and document the command issued to

correct the issue in the space provided below.

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The link terminated because the CHAP handshake cannot be completed without the correct user

credential on Branch1.

Branch1(config)# username Central password cisco

d. Issue the undebug all command on all routers to turn off debugging.

e. Verify end-to-end connectivity.

Reflection

1. What are the indicators that you may have a serial encapsulation mismatch on a serial link?

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Some of the indicators are: the network is no longer converged because some of the routes are removed and

the line protocol for the link is down.