Activity e-Lab Activity: username
name password password In this activity,
the student will demonstrate how to use the username
name password password command. Web
Links Configuring and Troubleshooting PPP Password
Authentication Protocol (PAP) http://www.cisco.com/en/US/tech/tk713/
tk507/technologies_tech_ note09186a0080093c6f.shtml
Content 3.3 Configuring PPP
3.3.4 Verifying the serial PPP encapsulation
configuration Use the show interfaces serial command
to verify proper configuration of HDLC or PPP encapsulation.
The command output in Figure illustrates a PPP configuration.
When high-level data link control (HDLC) is configured,
"Encapsulation HDLC" should be reflected in the
output of the show interfaces serial command. When PPP
is configured, its Link Control Protocol (LCP) and Network
Control Protocol (NCP) states can be checked using the show
interfaces serial command.Figure lists commands used when
enabling, configuring and verifying PPP. Lab Activity
Lab Exercise: Verifying PPP Configuration In this lab, the
student will configure a serial interface on the Brasilia and
Warsaw routers with the PPP protocol. Lab Activity
e-Lab Activity: Verify PPP Protocol In this lab, the student
will configure a serial interface on the Brasilia and Warsaw
routers with the PPP protocol. Web Links Configuring and
Troubleshooting PPP Password Authentication Protocol (PAP)
http://www.cisco.com/en/US/tech/ tk713/tk507/
technologies_tech_ note09186a0080093c6f.shtml
Content
3.3 Configuring PPP 3.3.5
Troubleshooting the serial encapsulation configuration
The debug ppp authentication command displays the
authentication exchange sequence. Figure illustrates the Left
router output during CHAP authentication with the router on the
right when debug ppp authentication is enabled. With
two-way authentication configured, each router authenticates
the other. Messages appear for both the authenticating process
and the process of being authenticated. Use the debug ppp
authentication command to display the exchange sequence as
it occurs. Figure highlights router output for a two-way PAP
authentication. The debug ppp command is used to display
information about the operation of PPP. The no form of
this command disables debugging output. Router#debug ppp
{authentication | packet | negotiation | error | chap}
Router#no debug ppp {authentication | packet | negotiation |
error | chap} Lab Activity Lab Exercise:
Troubleshooting PPP Configuration In this lab, the student
will configure a serial interface on the London and Paris
routers and troubleshoot the connection. Lab Activity
e-Lab Activity: Troubleshooting a Serial Interface In this lab,
the student will configure a serial interface on the London and
Paris routers then use show commands to troubleshoot and
connectivity issues.
Content Summary An
understanding of the following key points should have been
achieved: - Time division multiplexing
- The
demarcation point in a WAN
- The definition and
functions of the DTE and DCE
- The development of HDLC
encapsulation
- Using the encapsulation HDLC
command to configure HDLC
- Troubleshooting a serial
interface using the show interface and show
controllers commands
- The advantages of using PPP
protocol
- The functions of the Link Control Protocol
(LCP) and the Network Control Protocol (NCP) components of
PPP
- The parts of a PPP frame
- The three
phases of a PPP session
- The difference between PAP
and CHAP
- The steps in the PPP authentication
process
- The various options for PPP
configuration
- How to configure PPP encapsulation
- How to configure CHAP and PAP authentication
- Using show interface to verify the serial
encapsulation
- Troubleshooting problems with the PPP
configuration using the debug PPP command.