CCNA FAQ: Frame Relay Configuration
Q1. Imagine two Cisco routers, R1 and R2, using a Frame Relay service. R1 connects to a switch that uses LMI type ANSI T1.617, and R2 connects to a switch that uses ITU Q.933a. What keywords could be used in the R1 and R2 configuration so that the LMIs work correctly?
a. ansi and itu
b. T1617 and q933
c. ansi and q933
d. T1617 and itu
e. This won’t work with two different types.
Q2. BettyCo has five sites, with routers connected to the same Frame Relay network. VCs have been defined between each pair of routers. Betty, the company president, will fire anyone who configures anything that could just as easily be left as a default. Which of the following configuration commands, configured for the Frame Relay network, would get the engineer fired? (Choose three answers.)
a. ip address
d. frame-relay map
e. frame-relay inverse-arp
Q3. WilmaCo has some routers connected to a Frame Relay network. R1 is a router at a remote site, with a single VC back to WilmaCo’s headquarters. The R1 configuration currently looks like this:
interface serial 0/0
ip address 10.1.1.1 255.255.255.0
Wilma, the company president, has heard that point-to-point subinterfaces are cool, and she wants you to change the configuration to use a point-to-point subinterface. Which of the following commands do you need to use to migrate the configuration? (Choose two answers.)
a. no ip address
c. no encapsulation
d. encapsulation frame-relay
e. frame-relay interface-dlci
Q4. WilmaCo has another network, with a main site router that has ten VCs connecting to the ten remote sites. Wilma now thinks that multipoint subinterfaces are even cooler than point-to-point. The current main site router’s configuration looks like this:
interface serial 0/0
ip address 172.16.1.1 255.255.255.0
Wilma wants you to change the configuration to use a multipoint subinterface. Which of the following do you need to use to migrate the configuration? (Note: DLCIs 101 through 110 are used for the ten VCs.)
a. interface-dlci 101 110
b. interface dlci 101-110
c. Ten different interface-dlci commands
d. frame-relay interface-dlci 101 110
e. frame-relay interface dlci 101-110
f. Ten different frame-relay interface-dlci commands
Q5. Which of the following commands lists the information learned by Inverse ARP?
a. show ip arp
b. show arp
c. show inverse arp
d. show frame-relay inverse-arp
e. show map
f. show frame-relay map
Q6. Which of the following are Frame Relay PVC status codes for which a router sends frames for the associated PVC? (Choose two answers.)
Q7. Central site router RC has a VC connecting to ten remote routers (R1 through R10), with RC’s local DLCIs being 101 through 110, respectively. RC has grouped DLCIs 107, 108, and 109 into a single multipoint subinterface S0/0.789, whose current status is “up and up.” Which of the following must be true? (Choose two answers.)
a. Serial 0/0 could be in an up/down state.
b. The PVC with DLCI 108 could be in an inactive state.
c. The show frame-relay map command lists mapping information for all three VCs.
d. At least one of the three PVCs is in an active or static state.
Q8. Frame Relay router R1 uses interface S0/0 to connect to a Frame Relay access link. The physical interface is in an up/down state. Which of the following could cause this problem? (Choose two answers.)
a. The access link has a physical problem and cannot pass bits between the router and switch.
b. The switch and router are using different LMI types.
c. The router configuration is missing the encapsulation frame-relay command on interface S0/0.
d. The router received a valid LMI status message that listed some of the DLCIs as inactive.
Q9. There are three virtual circuit design strategies for a Frame Relay cloud. Explain what these are and the advantages and disadvantages associated with each.
Q10. Write a brief definition for the following terms:
- Local Management Interface
- Data Link Connection Identifier
- Local Access Rate
- Committed Information Rate
Q11. When you connect a router to a Frame Relay network, the service provider transmits DLCI information to your router via LMI. How does the router then find the Layer 3 address to associate with the circuit?
Q12. When connecting a router to a Frame Relay network with multiple destinations, split-horizon issues can occur. Explain why this is and the two methods you could use to fix these issues.
Q13. You are troubleshooting a Frame Relay network. It appears that your router is not receiving any DLCI information. What command(s) would you use to begin troubleshooting this problem and why?
Q14. Into what categories of network does Frame Relay fit? (Choose 2.)
C. Broadcast multi-access
Q15. Which of the following connections describe an on-demand circuit through the Frame Relay cloud that is created when needed and then destroyed after data has been transmitted?
Q16. Which of the following are valid LMI signaling types? (Choose 3.)
Q18. A router connected to a Frame Relay service provider can occasionally send faster than the subscribed _________, but never faster than the _________.
A. Local Access Rate, CIR
B. Virtual Circuit Speed, CIR
C. CIR, Virtual Circuit Speed
D. CIR, Local Access Rate
Q19. If your router is sending too much information into the Frame Relay cloud, the service provider tags any return traffic with a ______ to notify your router to reduce its transmission rate.
Q20. By default, Cisco routers receive LMI messages from the service provider that provide all usable DLCI numbers for the local circuit. How does your router find out the remote devices it is able to reach?
A. The router sends Hello messages down each virtual circuit.
B. The router uses CDP to discover its directly connected neighbors.
C. The router uses Inverse ARP messages.
D. The router does not need to do anything; LMI signaling from the service provider autoconfigures the router.
Q21. You have two routers connected over a Frame Relay network. The router in Arizona has the IP address 10.1.1.1/24 and uses a local DLCI of 512. The router in Michigan has the IP address 10.1.1.2/24 and uses a local DLCI of 598. Which syntax among the following choices correctly creates a static map that enables Arizona to reach Michigan and allows routing protocol functionality?
A. frame-relay map ip 10.1.1.2 512 broadcast
B. frame-relay map ip 10.1.1.1 512 broadcast
C. frame-relay map ip 10.1.1.2 598 broadcast
D. frame-relay map ip 10.1.1.1 598 broadcast
Q22. You are configuring your router’s Serial 0 interface to communicate across the Frame Relay cloud with a non-Cisco router. You would like to use the Inverse ARP feature of the router to avoid configuring static maps; what command would you use to enable this feature?
A. encapsulation frame-relay
B. inverse-arp frame-relay
C. ietf inverse-arp
D. encapsulation frame-relay ietf
Q23. You are troubleshooting your Frame Relay connections. After typing in the show frame-relay pvc command, one of your PVCs shows up as DELETED. What causes this?
A. Your router is incorrectly configured. You need to add the right DLCI information and the circuit should come up.
B. The remote router is incorrectly configured.
C. You are physically disconnected from the service provider.
D. You need to switch from a multipoint configuration to a point-to-point configuration and create a subinterface for each PVC you plan on using.
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