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Frame Relay Questions

August 2nd, 2017 in ROUTE 300-101 Go to comments

Question 1

Explanation

Normal (Ethernet) ARP Request knows the Layer 3 address (IP) and requests for Layer 2 address (MAC). On the other hand, Frame Relay Inverse ARP knows the Layer 2 address (DLCI) and requests for Layer 3 address (IP) so we called it “Inverse”. For detail explanation about Inverse ARP Request please read our Frame Relay tutorial – Part 2.

Question 2

Explanation

When saying “Frame Relay point-to-point” network, it means “Frame Relay subinterfaces” run “point-to-point”. Notice that Frame Relay subinterfaces can run in two modes:
+ Point-to-Point: When a Frame Relay point-to-point subinterface is configured, the subinterface emulates a point-to-point network and OSPF treats it as a point-to-point network type
+ Multipoint: When a Frame Relay multipoint subinterface is configured, OSPF treats this subinterface as an NBMA network type.

And there are 4 network types which can be configured with OSPF. The hello & dead intervals of these types are listed below:

Network Type Hello Interval (secs) Dead Interval (secs)
Point-to-Point 10 40
Point-to-Multipoint 30 120
Broadcast 10 40
Non-Broadcast 30 120

Therefore the default OSPF hello interval on a Frame Relay point-to-point network is 10 seconds.

Reference: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13693-22.html

Question 3

Explanation

Traffic shaping should be used when:
+ Hub site (headquarter) has much faster speed link than the spokes (remote sites). In this case we need to rate-limit the hub site so that it does not exceed the remote side access rate
+ Hub site has the same speed link as the spokes. For example both the headquarter and the spokes use T1 links. In this case, we need to rate-limit the remote sites so as to not overrun the hub.

An example of configuring traffic shaping is shown below:

interface Serial0/1
encapsulation frame-relay
frame-relay traffic-shaping
!
interface Serial0/1.10 point-to-point
ip address 10.10.10.10 255.255.255.0
frame-relay interface-dlci 10 class my_traffic_shaping
!
map-class frame-relay my_traffic_shaping
frame-relay adaptive-shaping becn //Configure the router to respond to frame relay frames that have the BECN bit set
frame-relay cir 128000 //Specify the committed information rate (CIR) for a Frame Relay virtual circuit
frame-relay bc 8000 //Specify the committed burst size (Bc) for a Frame Relay virtual circuit.
frame-relay be 8000 // Specify the excess burst size (Be) for a Frame Relay virtual circuit.
frame-relay mincir 64000 // Specify minimum acceptable CIR for a Frame Relay virtual circuit.

Reference: http://www.cisco.com/c/en/us/support/docs/wan/frame-relay/6151-traffic-shaping-6151.html

Question 4

Question 5

Question 6

Question 7

Explanation

Each subinterface is treated like a physical interface so split horizon issues are overcome.

Question 8

Explanation

Frame-relay uses data-link connection identifiers (DLCIs) to build up logical circuits. The identifiers have local meaning only, that means that their values are unique per router, but not necessarily in the other routers. For example, there is only one DLCI of 23 representing for the connection from HeadQuarter to Branch 1 and only one DLCI of 51 from HeadQuarter to Branch 2. Branch 1 can use the same DLCI of 23 to represent the connection from it to HeadQuarter. Of course it can use other DLCIs as well because DLCIs are just local significant.

Frame_Relay_DLCI.jpg

By including a DLCI number in the Frame Relay header, HeadQuarter can communicate with both Branch 1 and Branch 2 over the same physical circuit.

Question 9

Explanation

An example of configuring Frame Relay point-to-multipoint connections is described at: http://www.9tut.com/frame-relay-gns3-lab. Frame Relay point-to-multipoint requires inverse ARP (which is enabled by default). It requires the frame-relay mapping command to be configured also. For example: R1(config-if)#frame-relay route 102 interface Serial0/1 201.

Comments
  1. Elv
    August 3rd, 2017

    I’ve been revising the questions from this site an realised that there are some additional numbers. How can I get the updated PDF questions?@Admin

  2. Cert
    August 4th, 2017

    Got a new Question.

    Which two statements about Frame Relay Point-to-Point connections are true? (Choose Two)

    A. Changing a point-to-point sub interface to a different type requires the device to be reloaded.
    B. They use two DLCIs to communicate with multiple endpoints over the Frame Relay cloud.
    C. The device can establish a point-to-point connection to the cloud without a DLCI.
    D. They can operate normally without a DLCI map.
    E. Each physical interface that extends to the Frame Relay cloud can support a single SVC.

    Answer:

  3. anu
    August 18th, 2017

    @E.T whats the correct answer ADE?

  4. Anonymous
    August 25th, 2017

    Failed today with 760pts….although I cleared all my labs , loads of new questions ,don’t trust any dumps…study hard chaps….and loads of simlet ( IPV6 , ACL, NAT, NAT-PT ETC ETC )

    ACL very important ( IPV6 and IPV4 both)

    I was using my old 642-902 books :(, please get the new cert guide for CCNP route 300-101)

  5. rix
    August 26th, 2017

    Help me

    Got a new Question.

    Which two statements about Frame Relay Point-to-Point connections are true? (Choose Two)

    A. Changing a point-to-point sub interface to a different type requires the device to be reloaded.
    B. They use two DLCIs to communicate with multiple endpoints over the Frame Relay cloud.
    C. The device can establish a point-to-point connection to the cloud without a DLCI.
    D. They can operate normally without a DLCI map.
    E. Each physical interface that extends to the Frame Relay cloud can support a single SVC.

    Answer:

  6. Steffy
    August 28th, 2017

    Hello everyone, for latest valid dump with continuous update, please contact me at steffyshirls @ gmail .com

  7. Packet Boss :-)
    September 6th, 2017

    Watch out everyone there is new drag and drop on this topic. Its kinda like a sim but it isn’t. Its a full frame-relay network pic with DLCI/PVC, etc. The config of the network is a fill in the blank (your drag and drop) of frame-relay…of where and what commands go where

    I passed today with a 950 for my recert, I believe I got this one right cuz I had been building and trouble-shooting frame-relays for this exam and CCIE on GNS3 for a while…

  8. Jg
    September 22nd, 2017

    Passed today,
    this website is awesome, study the labs from here and the dumps from h*t*t*p*s*:*/*/*ww**w.*i*t*li**b*r*a*r*i*e*s*.*c*o*m*/(remove *)and it’s super easy

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