CCNP SP MPLS FAQ: MPLS Operation and Maintenance
Q1. What does MPLS LSP ping provide that IP ping does not?
Q2. Name three MPLS-specific MIBs.
Answer: MPLS-specific MIBs can include any three of the following:
- MPLS-TE MIB
Q3. What does a ping mpls or traceroute mpls with reply mode router-alert do?
Q4. What is the name for the Cisco IOS subsystem that is responsible for processing MPLS echo request and echo reply packets?
Q5. What MPLS-related information can you see with MPLS-aware Netflow?
Answer: With MPLS-aware Netflow, you can see the following MPLS-related information:
- Value of the labels
- Experimental bits value
- MPLS application that is associated with the top label
- Prefix that is associated with the top label
- Label position
- End-of-Stack bit
Q6. What prevents an MPLS echo request packet from being forwarded as an IP packet after it becomes unlabeled?
Q7. What is IP SLA?
Q8. If Type 1 VCCV is used, how is the packet identified as being an AToM VCCV packet?
Q9. Why would you want to change the default destination IP address of 127.0.0.1 in the IP header of LSP ping packets if the packets are label-switched anyway?
Q10. What is context-based access for SNMP?