Implementation WAN with PPP & CHAP

PPP is open protocol so that cisco's router and non cisco can make a communication each other with technology PAP.

What is PPP? Maybe all of you asked what is that? and for what that technology if we want to implement in cisco.

Okay, now i try to share what i know, because i still learning to configurate and analyse that technology.

according to web page who i read a few days ago about PPP & CHAP. Before that, we have to know for what if we used PPP. PPP is one of protocol in WAN. There are 3 protocol in WAN, the names are HDLC, PPP and FRAME-RELAY.  you can open this if you wan to know more.

Follow this step to implement a PPP&CHAP in PacketTracer :

1. Make an interface like in picture below. This network have three network with Network ID 10::/64, 12::/126 , 23::/126, and then 30::/64

If you already make this interface, do verification to configuration which finished that default configuration cisco use HDLC Protocol with serial communication. Attention this picture below :

you will verifying all of interface router depend topology that you made.

2. Finish? if already finish now lets go to R1 to configuration that router and choose CLI tab on R1 to start the configuration. Before we configure PPP, we have to config IP Address, i use IPV6 in this implementation.

R1 :

   

    

In IPV6 Address, you can use Network ID but if you use IPV4 you cannot use Network ID as a Network PC or Router. So, i use 12::/126 as a IP R1 in port se0/0/0. Unicast-Routing is one of network transmission Point-to-Point (one to one) or one network to another network which sent only one client and network LAN which used no charged to this network transmission.

R2 :

     

R3 :

    

After we make a configuration with router, we have to setting IP Adrees in Laptop. 

L1-2-3 :

Click L1 & L2 & L3 and server-manda and then choose Desktop --> IP Configuration 

Do that setting in L2 and L3. Its very simple if we use Auto Config, you just click Auto Config, the blank will be fill automatic. NOTE !!! Auto config only use in prefix /64 in IPV6. I already tried with another prefix but i can't. The blank dialog box IPV6 Configuration its not show the Local Adrees and DNS :)

now all of port in interface has been change in power ON. The colour change become green from red. Its mean your interface has been Up. So, next we will configure PPP configuration in every Router.

enter every router, first we try in R1 :

that picture means we want to make a configuration with PPP. So, your packet will be encapsulate when the packet sent on network. PPP have a two command, namely CHAP and PAP. what is the different? and when we use both of them? we can use bothe of them directly CHAP PAP in one command. If we use PAP, system will access with user. will sent authantication identity (username), system will check validity identify and password by accept or deny connection. CHAP is authentication protocol  three-way-handshaking which give high security from PAP. This method your password will safety, why? because, your password never sent by online. R1 is connected with R2, so put username R2 in R1. Dont forget that you have to put same password into R2 configuration.

so, move to R2 :

same with R1, you have to put username R1 and R3 because R2 are connected with R1 and R3 too. You have to make encapsulation before you use CHAP or PAP or CHAP PAP.

R3:

with do command in text below, verify this result configuration in every router.

        

after that, try to ping the network neighboard