Frame Relay vs. PPP Tail

Unanswered Question
Sep 19th, 2007

We have a provider-based MPLS network and the majority of our access tails are provisioned using Frame-Relay. I believe this is just a means to provide access as we aren't getting any FECNs,BECNs, etc.

I believe we may have the option to request an access tail using ppp encapsulation instead of frame relay.

Can anyone tell me the advantages/disadvantages of ppp vs. frame relay when used strictly as an access medium?

I have this problem too.
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Edison Ortiz Wed, 09/19/2007 - 16:10

In a hub-spoke design, I prefer going with frame-relay. With frame-relay, you are able to create subinterfaces thus providing a more hierarchal design.

If you are going with a point-to-point design, then you can use either access medium but go with the easiest with is ppp :)

mlitka Wed, 09/26/2007 - 15:57

Why do the providers seem to always default to Frame-relay? I don't ever get asked which one I want to use. Strange.

Edison Ortiz Wed, 09/26/2007 - 17:15

MPLS is often a many-to-many topology and frame-relay fits the bill based on the feature I explained before.

mlitka Wed, 10/31/2007 - 12:37

To be clear, I am talking about a Service Provider MPLS network here. When would you need more than 1 DLCI or subinterface on the CE in this situation?

Edison Ortiz Wed, 10/31/2007 - 12:46

With MPLS, you can configure a location to talk directly to many locations, not directly to the hub. On this case, you need more than 1 DLCI.


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