CCNP SP MPLS FAQ: Cisco Express Forwarding Q1. Name the two components of CEF. Answer: The two components of CEF are the adjacency table and the FIB or CEF table. Q2. Name the three most common packet switching methods in Cisco IOS. Answer: Process switching, fast switching, and CEF switching are the three most commonpacket switching methods in Cisco IOS. Q3. Why does MPLS … [Read more...]
CCNP SP MPLS FAQ: MPLS and ATM Architecture
CCNP SP MPLS FAQ:MPLS and ATM Architecture Q1. In what ways is an ATM LSR different from a frame-based LSR? Answer: The label value is encoded in the VPI/VCI fields. ATM LSRs forward cells. ATM LSRs are not capable of decrementing the TTL. LDP runs in Downstream-on-Demand label advertisement mode on ATM LSRs. Q2. What is the default control VC for … [Read more...]
CCNP SP MPLS FAQ: Label Distribution Protocol
CCNP SP MPLS FAQ: Label Distribution Protocol Q1. What is the fundamental purpose of LDP? Answer: The fundamental purpose of LDP is to distribute label bindings. Q2. Name the four main functions that LDP takes care of. Answer: The four main functions that LDP takes care of include the following: The discovery of LSRs that are running LDP Session establishment and … [Read more...]
CCNP SP MPLS FAQ: Forwarding Labeled Packets
CCNP SP MPLS FAQ: Forwarding Labeled Packets Q1. What does the push operation do on a labeled packet? Answer: The push operation replaces the top label with another and then pushes one or more labels onto the label stack. Q2. Which Cisco IOS command do you use to see what the swapped label is and which labels are pushed onto a received packet for a certain prefix? Answer: … [Read more...]
CCNP SP MPLS FAQ: MPLS Architecture
CCNP SP MPLS FAQ: MPLS Architecture Q1. Name the four fields that are part of a label. Answer: The four fields that are part of a label are a 20-bit label value, 3 experimental bits, 1 Bottom of Stack bit, and an 8-bit TTL field. Q2. How many labels can reside in a label stack? Answer: Any number of labels can reside in a label stack. Q3. In which layer does MPLS fit in … [Read more...]
CCNP SP MPLS FAQ: The Evolution of MPLS
CCNP SP MPLS FAQ: The Evolution of MPLS Q1. What are the MPLS applications mentioned in this chapter? Answer: Traffic engineering, MPLS VPN, AToM, and VPLS are the MPLS applications mentioned in this chapter. Q2. Name three advantages of running MPLS in a service provider network. Answer: The advantages of running MPLS in a service provider network include the … [Read more...]