CCIE SP MPLS FAQ: Advanced MPLS Topics Q1. Is it possible to restrict which prefixes have labels assigned to them so that label switching occurs to only certain destination prefixes? Answer: No. Labels are assigned to all internal prefixes, although it is possible to filter the distribution of these prefixes, which provides the desired result. Q2. What is the maximum frame … [Read more...]
CCIE SP MPLS FAQ: Frame-mode MPLS Operation
CCIE SP MPLS FAQ: Frame-mode MPLS Operation Figure: SuperNet Service Provider Network Q1. MPLS can function using two different modes. What are they? Answer: Frame-mode—Labeled packets are exchanged as frames at Layer 2 Q2. When using frame-mode MPLS, where is the label header carried within the frame? Answer: The label header is inserted between the Layer-2 and … [Read more...]
CCIE SP MPLS FAQ: Multiprotocol Label Switching (MPLS) Architecture Overview
CCIE SP MPLS FAQ: Multiprotocol Label Switching (MPLS) Architecture Overview Q1. Describe some of the drawbacks that you might encounter when using traditional IP routing. Answer: Hop-by-hop forwarding decisions are based on IP destination lookup. IP lookup is based purely on the destination unicast address. All packets bound for the same destination follow the same path. All … [Read more...]