CCNA - Frame-Relay and PPP (PPPoFR - PPP over Frame-relay) - Lab 1

Why PPPoFR ?

well , the answer is 'PPP support additional features than Frame-Relay'.

what are those features?

In basic , PPP features Authentication , Data compression , Multilinks etc..
with frame-relay , we couldn't Authenticate the peer , couldn't Compress data , also  couldn't bundle PVCs. Using the PPP with FR we can overcome all those disadvantages.

Configuring PPPoFR is not difficult.
First  configure the Serial port with the encapsulation of Frame-Relay
Then we need to configure Frame-relay to use PPP.
PPP configurations are done using a Virtual-template.


Here are the complete Configurations of the above Topology.

Site1 Configurations

 username SITE2 password 0 cisco  
 !  
 !   
 !  
 !  
 !  
 !  
 !  
 interface Loopback0  
  ip address 1.1.1.1 255.255.255.255  
 !  
 interface FastEthernet0/0  
  no ip address  
  shutdown  
  duplex half  
 !  
 interface Serial1/0  
  no ip address  
  encapsulation frame-relay  
  serial restart-delay 0  
  frame-relay interface-dlci 101 ppp Virtual-Template1  
 !  
 interface Serial1/1  
  no ip address  
  shutdown  
  serial restart-delay 0  
 !  
 interface Serial1/2  
  no ip address  
  shutdown  
  serial restart-delay 0  
 !  
 interface Serial1/3  
  no ip address  
  shutdown  
  serial restart-delay 0  
 !  
 interface Virtual-Template1   
  ip address 10.0.0.1 255.255.255.252  
  ppp authentication chap  
  ppp chap hostname SITE1  
  ppp chap password 0 cisco  
 !  
 router eigrp 1  
  network 1.1.1.1 0.0.0.0  
  network 10.0.0.0 0.0.0.3  
  no auto-summary  
 !  

Site2 Configurations

 username SITE1 password 0 cisco  
 !  
 !   
 !  
 !  
 !  
 !  
 !  
 interface Loopback0  
  ip address 2.2.2.2 255.255.255.255  
 !  
 interface FastEthernet0/0  
  no ip address  
  shutdown  
  duplex half  
 !  
 interface Serial1/0  
  no ip address  
  encapsulation frame-relay  
  serial restart-delay 0  
  frame-relay interface-dlci 201 ppp Virtual-Template1  
 !  
 interface Serial1/1  
  no ip address  
  shutdown  
  serial restart-delay 0  
 !  
 interface Serial1/2  
  no ip address  
  shutdown  
  serial restart-delay 0  
 !  
 interface Serial1/3  
  no ip address  
  shutdown  
  serial restart-delay 0  
 !  
 interface Virtual-Template1   
  ip address 10.0.0.2 255.255.255.252  
  ppp authentication chap  
  ppp chap hostname SITE2  
  ppp chap password 0 cisco  
 !  
 router eigrp 1  
  network 2.2.2.2 0.0.0.0  
  network 10.0.0.0 0.0.0.3  
  no auto-summary  
 !  

first , PPP LCP authenticate the Peer.
Then Handover the control to the PPP NCP (in this case its IPCP)

Sending Data is encapsulated by the IP protocol then there are two protocols at the Layer 2. PPP and FR. but PPP will encapsulate the Packet after IP layer because the Main Layer 2 protocol should be the FR. so FR will finally encapsulate the Frame and pass to the Physical layer.

If you have Questions regarding FR or PPP , Please Comment it. Thank you...