PPP

 

Introduction

A serial interface (E1/V.35) can work in HDLC and PPP mode. Here ppp will be used over an E1 serial link.

 

Network Diagram

 

Configuration

 

Lets consider that the two routers are connected through E1 link. Lets assume that the routers are using all 31 timeslots ie 1-31 and not using any crc. The configuration on Router-A for ppp encapsulation would be: 
Okapi(config)# interface Serial 0
Okapi(config-if)# encapsulation  ppp
Okapi(config-if)# timeslot 1 31
Okapi(config-if)# ts16
Okapi(config-if)# no crc4
Okapi(config-if)# ip address  10.5.5.5 255.255.255.0
Okapi(config-if)# no shut

The configuration on Router-B for ppp encapsulation would be: 

Router(config)#controller e1 0
Router(config-controller)#no channel-group 0
Router(config-controller)#channel-group  0 timeslots 1-31
Router(config-controller)#framing no-crc4

Router(config)#interface  serial  0:0
Router(config-if)# ip address  10.5.5.6 255.255.255.0
Router(config-if)# no shut