vMX

Hi,

Quick question....

Utilsing 4 x MX240 for provider hardware. As this is the provider equipment, with Customers one side and Transit the other, it basically means that all 4 will be provider edge (PE) routers (I may be wrong but don't think so)....

Naturally I want an MPLS backbone. Is it possible to run MPLS correctly across only PE equipment or are P routers also required? 

Obviously it makes every PE router Ingress and Egress from an MPLS perspective. With this in mind I also cannot use PHP (Penultimate Hop Popping) of the labels as there is NO penultimate hop.

I have no issue with the IS-IS and BGP configuration but would like to know about the MPLS. I can, of course, just configure MPLS anyway and see what the results are but would prefer a definative answer.

One more add on, 2 of the MX240 routers will be acting as LNS (L2TP Network Server) devices.

Thanks in advance

I understand that you want to run topology like this :

+-----------+                      +--------------+
|           |        MPLS          |              |
|    PE1    +----------------------+    PE2       |
|           |                      |              |
+-----------+                      +--------------+

There is no problem with this topology, you can run MPLS without P router as well.

[KUDOS PLEASE! If you think I earned it!

If this solution worked for you please flag my post as an "Accepted Solution" so others can benefit..]

Hi Adwivedi,

Yes, that's basically the topology.... the exact topology is as follows:

CE --> PE (LNS) ------> PE (Core)  -----> Transit

                                           |

                                           |   

CE --> PE (LNS) -----> PE (Core 1) -----> Transit

That's great that it still works.