CCIE SP MPLS FAQ: Frame-mode MPLS Operation
Figure: SuperNet Service Provider Network
Q1. MPLS can function using two different modes. What are they?
Q2. When using frame-mode MPLS, where is the label header carried within the frame?
Q3. Describe the format of an MPLS label header.
Q4. In a LAN environment, how does the receiving router identify an MPLS packet?
Q5. List three different actions an MPLS LSR can perform on a labeled packet when running in frame-mode.
Q6. Name two label-distribution protocols used in conjunction with unicast destination-based routing.
Q7. Which label distribution method does a frame-mode implementation use?
Q8. Which label allocation method does a frame-mode implementation use?
Q9. Which label retention method does a frame-mode implementation use?
Q10. How is penultimate hop popping requested through the use of TDP or LDP?