The Journey of a Network Engineer

Jul 27 2012   5:04AM GMT

PPP over Frame Relay

Sulaiman Syed Profile: Sulaiman Syed

In the process of studying, i came upon a dreaded topic. Well, it was dreaded cause i never got my hands at it. PPP over Frame Relay, or PPPoFR. For some reason, I can’t figure it out. So, the best is. Do little studying about it, write it. and Hopefully it sticks in my head.

To configure PPP over Frame-relay. Then using “virtual-template” is a must.

1- PPP with virtual template

This is the rather straight forward configurations. associate the virtual template interface with the frame-relay interface. All interface commands (ip address, authentication, etc) will be applied to the virtual template.

interface virtual-template 1
ip address 10.1.1.1 255.255.255.0
ppp authentication pap

Then, this virtual template will be associated with the frame-relay DLCI.

 interface s0/0
frame-relay interface-dlci 101 ppp virtual-template 1

2- PPP with Multilink

In this, we merge two different DLCI (FR circuits) to act like a single PPP link.  The Multilink will have IP address, as well as the ppp configurations.

interface Multilink 10
ip add 10.1.1.1 255.255.255.0
ppp multilink
ppp multilink group 10

Then, virtual template will be used to mind the ppp multilink interface to it.

interface virtual-template 1
ppp multilink
ppp multilink group 10

lastly, the frame-relay interface-dlci will be associated with this virtual template

 interface s0/0
frame-relay interface-dlci 101 ppp virtual-template 1

As a conclusion, i can say it is straight forward. The fact that it was not practiced enough made it more difficult. Hopefully, in my next time, while practice lab, i would be able to configure PPPoFR without any issues. :)

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