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MPLS Fundamentals by Luc De Ghein - CCIE No. 1897

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Chapter 14

1. What does MPLS LSP ping provide that IP ping does not?
A1: Answer: IP ping verifies only IP connectivity, whereas LSP ping also verifies whether the LSP is broken.
2. Name three MPLS-specific MIBs.
A2: Answer: MPLS-specific MIBs can include any three of the following:

- MPLS-LDP-MIB

- MPLS-LSR-MIB

- MPLS-TE MIB

- MPLS-VPN-MIB

- CISCO-IETF-PW-MIB

- CISCO-IETF-PW-MPLS-MIB

- CISCO-IETF-PW-TC-MIB

3. What does a ping mpls or traceroute mpls with reply mode router-alert do?
A3: Answer: The return packet has the IP Router Alert option. The Router Alert label is present if the return packet is labeled.
4. What is the name for the Cisco IOS subsystem that is responsible for processing MPLS echo request and echo reply packets?
A4: Answer: ...

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