Wednesday, April 11, 2012

Feeding the FIB & LFIB


  • LIB: Label Information Base
    • Each LSR store all labels & their related information in Label Information Base.
  • Each LSR must choose the best label & outgoing interface & then populate that information into the FIB & LFIB
  • As a result, the FIB & LFIB having the best currently used LSP.
  • Best route in IP routing table become the best LSP in LIB.
  • LSR makes the following decision:
    • for each route in the routing table
    • find the corresponding label information in LIB
    • based on the outgoing interface & next hop router.
    • Add the corresponding label information to the FIB & LFIB.

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