Review Questions
Use this chapter and your practical troubleshooting knowledge and skills to answer the following questions. The answers are located in Appendix A, “Answers to Review Questions.”
| 1: | Can a single Frame Relay PVC be assigned different DLCIs on each end of a virtual circuit? |
| 2: | What are the three possible states for a Frame Relay PVC? Explain. |
| 3: | What is the result if one end of the PVC is set to the default Cisco LMI type and the other end is set to ANSI or Q933A? |
| 4: | Can you ping yourself in Frame Relay? Why or why not? |
| 5: | Headquarters is connected to several branch office routers through a Frame Relay cloud. You know for a fact that the hub router is version 12.1, but you are not sure about all the remotes. Keepalive activity is occurring at most of the remote offices but not all of them. What should you check? |
| 6: | Headquarters is connected to several branch office routers through a Frame Relay cloud. The engineer at one of the branch offices is having problems communicating with another branch office. How can you help him out? |
| 7: | Explain the output of show frame-relay map in the following example:
r1#show frame-relay map
Serial1 (up): ip 192.168.5.6 dlci 104(0x68,0x1880), dynamic,
broadcast,, status defined, active
|
| 8: | You have decided to contact your service provider about getting a higher CIR to allocate more bandwidth because you have been experiencing consistent problems with dropped packets due to congestion on the PVC. What command did you use to determine this? |
| 9: | In an all-Cisco-shop Frame Relay, Cisco encapsulation is fine. What Frame Relay encapsulation type is available for other vendors? |
| 10: | Point-to-point subinterfaces are often used in configuring Frame Relay to avoid the routing issues with main interfaces and multipoint configurations. Do you need an IP address on the main interface if using point-to-point subinterfaces? |
| 11: | How does a router get a DLCI? |
| 12: | You are attempting to fix a bad IP address on a Frame Relay interface, but the mapping is still showing the old address. What should you do? |
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