InTroDucTion and ConFiuGuraTion of PPP Protocol

1. Authentication Protocols in PPP

Router 1 Interfaces configuration}

Ø  R1(config)#interface serial 1/0

Ø  R1(config-if)#description CONNECTED TO ROUTER2

Ø  R1(config-if)#ip address 10.250.250.1 255.255.255.252

Ø  R1(config-if)#clock rate 64000

Ø  R1(config-if)#no shut

Ø  R1(config-if)#exit

Ø  R1(config)#interface serial 1/1

Ø  R1(config-if)#description CONNECTED TO ROUTER2

Ø  R1(config-if)#ip address 192.168.2.1 255.255.255.252

Ø  R1(config-if)#clock rate 64000

Ø  R1(config-if)#no shut

Ø  R1(config-if)#exit

{Router 2 Interfaces configuration}

Ø  R2(config)#interface serial 1/0

Ø  R2(config-if)#description CONNECTED TO ROUTER1

Ø  R2(config-if)#ip address 10.250.250.2 255.255.255.252

Ø  R2(config-if)#no shut

Ø  R2(config-if)#exit

Ø  R2(config)#interface serial 1/1

Ø  R2(config-if)#description CONNECTED TO ROUTER1

Ø  R2(config-if)#ip address 192.168.2.2 255.255.255.252

Ø  R2(config-if)#no shut

Ø  R2(config-if)#exit

{Router1 PPP Configuration}

Ø  R1(config-if)#interface serial 1/0

Ø  R1(config-if)#encapsulation ppp         {Dedicated port for PPP}

Ø  R1(config-if)#ppp authentication chap       {Authentication CHAP}

Ø  R1(config-if)#exit

Ø  R1(config)#interface serial 1/1

Ø  R1(config-if)#encapsulation ppp            {Dedicated port for PPP}

Ø  R1(config-if)#ppp authentication chap         {Authentication CHAP}

Ø  R1(config-if)#exit

Ø  R1(config)#username R2 password cisco        {Train the Router1 To Authenticate Router2 using Router2 Username and Password}

{Router2 PPP Configuration}

Ø  R2(config-if)#interface serial 1/0

Ø  R2(config-if)#encapsulation ppp

Ø  R2(config-if)#ppp authentication chap

Ø  R2(config-if)#exit

Ø  R2(config)#interface serial 1/1

Ø  R2(config-if)#encapsulation ppp

Ø  R2(config-if)#ppp authentication chap

Ø  R2(config-if)#exit

Ø  R2(config)#username R1 password cisco          {Username:- Router1 and Password cisco {password same in all Routers} 

            {PPP Configuration is done}

Show & Troubleshooting Commands

Ø  Router# show interface serial 1/0

Ø  Router# debug ppp {option}

{Now Ping Router1 and Router2}

1. Multilink Configurations:- it Bundles multiple links in a single link and also Load Balancing between Links

{Router 1 Interface configuration}

Ø  R1(config)#interface serial 1/0

Ø  R1(config-if)#description CONNECTED TO ROUTER2

Ø  R1(config-if)#no ip address

Ø  R1(config-if)#ppp multilink group 1      {enable Multilink and 1 is group no :- any no. But same in all routers}

Ø  R1(config-if)#exit

Ø  R1(config)#interface serial 1/1

Ø  R1(config-if)#description CONNECTED TO ROUTER2

Ø  R1(config-if)#no ip address

Ø  R1(config-if)#ppp multilink group 1

Ø  R1(config-if)#exit

{Multilink interface Configuration}

Ø  R1(config)#interface multilink 1         {1 :- Group no.}

Ø  R1(config-if)#ip address 192.168.2.1 255.255.255.252

Ø  R1(config-if)#ppp multilink       {enable PPP}

Ø  R1(config-if)#exit

{Router2 interface configuration}

Ø  R2(config)#interface serial 1/0

Ø  R2(config-if)#no ip address

Ø  R2(config-if)#ppp multilink group 1      {enable Multilink and 1 is group no :- any no. But same in all routers}

Ø  R2(config-if)#exit

Ø  R2(config)#interface serial 1/1

Ø  R2(config-if)#no ip address

Ø  R2(config-if)#ppp multilink group 1

Ø  R2(config-if)#exit

{Multilink interface Configuration}

Ø  R2(config)#interface multilink 1         {1 :- Group no.}

Ø  R2(config-if)#ip address 192.168.2.2 255.255.255.252

Ø  R2(config-if)#ppp multilink

Ø  R2(config-if)#end

Show & Troubleshooting Commands

Ø  Router# show interface multilink  1       {interface number}

Ø  Router# debug ppp multilink {option}