MPLS ConceptsIP / MPLS Comparison

• IP and MPLS both use FEC classification

• In IP routing at each hop:

  • re-classify the packet into a FEC
  • determine the next-hop of that FEC

• In MPLS:

  • on ingress:
    • classify the packet into a FEC
    • assign a label based on FEC
  • in MPLS core:
    • no subsequent packet classification is done
    • switch purely based on label information

Previous slide

Next slide

Back to first slide

View graphic version