We're Sorry, Full Content Access is for Members Only...

If you like to keep on reading, Become a Member Now! Here is Why:

  • Learn any CCNA, CCNP and CCIE R&S Topic. Explained As Simple As Possible.
  • Try for Just $1. The Best Dollar You've Ever Spent on Your Cisco Career!
  • Full Access to our 631 Lessons. More Lessons Added Every Week!
  • Content created by Rene Molenaar (CCIE #41726)


406 New Members signed up the last 30 days!


100% Satisfaction Guaranteed!
You may cancel your monthly membership at any time.
No Questions Asked!


Forum Replies

  1. Hi Rene,

    Thanks for your reply.
    As you mentioned, information inside the RIB is use to build the LIB.
    So i would imagine to have a LABEL for all the available routes.

    e.g. I have 3 best routes to the same destination with rip, eigrp, ospf in the RIB.  via  - rip  via  - eigrp  via  - ospf

    q1) Can i check for FIB, does it contain the same amount of available routes as in the RIB ?

    q2) if the above is yes, i would believe FLIB and FIB would have the same amount of labels ?

    q3) it is

    ... Continue reading in our forum

  2. Hi Stuart,

    Did you see this tutorial?


    I think that one will be helpful to understand this better. Within the MPLS “core”, we only advertise the loopback interfaces of the PE routers in our IGP, OSPF in most of my examples. The P router will only have these networks in its routing table. The LIB is based on the information of the RIB (Routing Table), so you only find labels for those loopbacks there, these are the transport labels needed to get from one PE to another PE.

    Only the PE routers have to kno

    ... Continue reading in our forum

28 more replies! Ask a question or join the discussion by visiting our Community Forum