Actualtests.4A0-106 · Exam A QUESTION 1 Which method does the Alcatel-Lucent 7750 SR use for the...

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4A0-106

Alcatel-Lucent Virtual Private Routed Networks

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Exam A

QUESTION 1Which method does the Alcatel-Lucent 7750 SR use for the allocation of VPRN labels?

A. One label per routeB. One label per next-hopC. One label per VRFD. One label per prefixE. One label per tunnel

Correct Answer: CSection: (none)Explanation

Explanation/Reference:Explanation:

QUESTION 2In a provider core consisting of 6 PE and 4 P routers, what is the minimum number of BGP sessionsrequired in total for correct operation of VPRN services?

A. 0B. 5C. 10D. 15E. 45

Correct Answer: DSection: (none)Explanation

Explanation/Reference:appropriately answered

QUESTION 3It is required to prepare the provider core for LDP on an Alcatel-Lucent 7750 SR. Based on theconfiguration shown below, choose the answer that best describes the given configuration.

A. This configuration is correct and completeB. This configuration is correct except that the system interface must be addedC. This configuration is correct except that the interfaces facing the CE routers must be added.D. MPLS configuration is not required



QUESTION 4Given the following VPRN topology: The VPRN service 10 is correctly configured and operational withOSPF as the PE to CE routing protocol at both customer sites. The OSPF database on CE-A contains Type1 LSAs. These routes will appear as what LSA type on CE-B?

A. These routes will not appear on CE-BB. Type 1 LSAsC. Type 3 LSAsD. Type 5 LSAsE. Type 7 LSAs



QUESTION 5In the output from an Alcatel-Lucent 7750 SR shown below, what does the highlighted text represent?

A. The LDP identifierB. The Service identifierC. The Route TargetD. The Route DistinguisherE. The tunnel label



QUESTION 6Which of the following statements best describes the output from an Alcatel-Lucent 7750 SR shown below?


A. The As-Path is not present as it was removed with the s-override configuration commandB. The As-Path is not present as it was removed with the o-as-path configuration commandC. The As-Path is not present as a policy was configured to set it to the null value

D. The As-Path is not present as VPN-IPv4 routes do not propagate the IPv4 As-Path BGP attribute



QUESTION 7When configuring BGP as the PE-CE protocol on an Alcatel-Lucent 7750 SR, the configuration on the CE isdone under the ____________ context and the PE configuration is under the ____________ context.

A. Global, routerB. Router, routerC. Service, routerD. Router, serviceE. Service, serviceF. Router, global



QUESTION 8An advantage of using BGP as the PE-CE protocol is that route policies are no longer required to controlthe exchange of routes from BGP to MP-BGP.

A. TrueB. False

Correct Answer: BSection: (none)Explanation

Explanation/Reference:precisely.

QUESTION 9Which of the following commands on an Alcatel-Lucent 7750 SR will verify connectivity for a VPRN service<service-id> when issued from the PE?

A. oam vprn-ping <service-id> source <source-ip> destination <destination-ip>B. oam <service-id> vprn-ping source <source-ip> destination <destination-ip>C. vprn-ping router <service-id> <destination-ip>D. Ping <destination-ip> source <source-ip>

Correct Answer: ASection: (none)Explanation


QUESTION 10Which command should be used on an Alcatel-Lucent 7750 SR acting as the PE, to view the tablecontaining the BGP routes received from the remote sites?

A. Show router bgp routesB. Show router bgp routes address-family vpn-ipv4C. Show router bgp routes <service-id>D. Show router <service-id> bgp routes

Correct Answer: A

Section: (none)Explanation


QUESTION 11When would it be appropriate to use the as-override command?

A. When sites of different VPRN customers use the same BGP AS numberB. When sites of the same VPRN customer use the same BGP AS numberC. When sites of different VPRN customers use different BGP AS numbersD. When sites of the same VPRN customer use different BGP AS numbersE. When the customer site AS number is the same as the provider AS number




A. The BGP session from PE to P is not operationalB. The BGP session between PEs is operationalC. The BGP session between PE and CE is not operationalD. The BGP session from PE to CE is operationalE. The BGP session between PEs is not operational



QUESTION 13When a routing protocol is configured as the PE-CE protocol at one site of a customer VPRN, the samerouting protocol must be configured as the PE-CE protocol at all other sites of the same customer VPRN.

A. TrueB. False



QUESTION 14When an Alcatel-Lucent 7750 SR receives a BGP update containing an AS-Path loop, what is the defaultaction?

A. The update is accepted and the route installed in the route table.B. The update is accepted but the route will not be installed in the route table

C. The update is rejectedD. The peer session is dropped



QUESTION 15Which command is used to generate the output from an Alcatel-Lucent 7750 SR shown below?

A. Show service 3B. Show service id 3C. Show service 3 baseD. Show service id 3 baseE. Show service 3 detailF. Show service id 3 detail



QUESTION 16Choose the best answer to describe the result of the configuration of an Alcatel-Lucent 7750 SR shownbelow?

A. The PE will install a maximum of 40 prefixes into thecustomer vrf and generate a logmessage when 40routes are received

B. The PE will install a maximum of 40 prefixes into the customer vrf, and generate a log message bothwhen 30 and 41 routes are received

C. The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 10routes are received and disable learning of new routes at 41

D. The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 10routes are received and drop the connection at 41

E. The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 4routes are received and disable learning of new routes at 41

Correct Answer: ESection: (none)Explanation


QUESTION 17You are configuring spoke SDP termination of a VPLS service on a VPRN interface on an AlcatelLucent7750 SR. The spoke SDP is running over a NULL encapsulated network port. The best practice is to set theVPRN interface p-mtu equal to what value over a NULL encapsulated network port.

A. The SDP path-MTU minus 14B. The LMTU found in how router ldp bindings on the VPLS side of the spoke SDPC. The configured service-mtu of the VPLS serviceD. The LMTU found in how router ldp bindings on the VPLS side of the spoke SDP minus14E. The SDP path-MTU



QUESTION 18What is the minimum number of Route Distinguishers required to implement an overlapping VPRNinvolving 5 different customers?

A. 1B. 3C. 5D. 7E. 10



QUESTION 19Which of the following best describes the goal of an Extranet VPRN?

A. Allow routes to be exchanged between all or selected sites of one VPRN and all or selected sites of asecond VPRN

B. Allow the service provider to provide multiple VPRNs with Internet accessC. Reduce the number of VPRN tunnels requiredD. Simplify the administration of multiple VPRNsE. Force all traffic in multiple VPRNs to pass through a single device



QUESTION 20Which command may be used on an Alcatel-Lucent 7750 SR to verify the number of VRF routes allowed,based on the maximum routes value configured in the service instance?

A. Show service id <service-id> baseB. Show router bgp <service-id> routes

C. Show service id <service-id> maximum-routesD. Show router <service-id> status


Explanation/Reference:utterly.

QUESTION 21What are the two main benefits of a hub and spoke VPRN design? (Choose two)

A. Reduced number of VPN tunnels that need to be managedB. Centralized filtering policies with the introduction of a hub siteC. Optimal routing between all sitesD. Limited configuration required on the hub PE device

Correct Answer: ABSection: (none)Explanation

Explanation/Reference:correct.

QUESTION 22Why would a selective export policy be applied to a customer VPRN service? (Choose three)

A. To limit the number of routes advertised from a customer siteB. To limit the number of routes learned from other customer sites CTo limit the size of the VRF tableC. To limit connectivity to selected customer networksD. To perform packet filtering

Correct Answer: ACSection: (none)Explanation

Explanation/Reference:right.

QUESTION 23Which of the following commands may be used on an Alcatel-Lucent 7750 SR to display a networkexported locally to BGP on the originating router? (Choose two)

A. Show router bgp routesB. Show router bgp routes prefix <prefix>C. Show router bgp routes <prefix> self-originatedD. Show router bgp routes <prefix> huntE. Show router bgp neighbor <neighbor ip> advertised-routes

Correct Answer: DESection: (none)Explanation


QUESTION 24The policies shown below from the configuration of an Alcatel-Lucent 7750 SR have been created toimplement an Extranet VPRN between the main sites of two separate VPRNs. How should these policiesbe applied?

A. ample Policy should be applied as an export policy on the PE connected to the main site of Customer 1B. ample Policy 3 should be applied as an export policy on the PE connected to the main site of Customer

2C. ample Policy 3 should be applied as an export policy on both PEs connected to the main site of

Customer 1 and the main site of Customer 2D. ample Policy should be applied as an export policy on both PEs connected to the main site of Customer

1 and the main site of Customer 2E. ample Policy should be applied as an export policy on all PEs connected to sites of Customer 1



QUESTION 25What mechanism allows routes to be shared between customers in different VPRNs?

A. The routes to be shared are identified by common route targetsB. The routes to be shared are identified by common route distinguishersC. The routes to be shared are identified by common AS numbersD. The routes to be shared are identified by common VPN labels



QUESTION 26Which of the following about the maximum number of routes that can be accepted in a VRF for a VPRNservice on the Alcatel-Lucent 7750 SR is FALSE?

A. The Alcatel-Lucent 7750 SR allows the setting of the maximum number of routes that can be acceptedin a VRF for a VPRN service.

B. The "maximum-routes" command is used to specify the maximum number of remote routes that can beheld within a VRF for a VPRN service.

C. When the "maximum-routes" command is used with the "log-only" parameter, new routes are stilllearned.

D. Once the "threshold" value is reached, no new routes are added to the VRF.



QUESTION 27Which of the following about an Alcatel-Lucent 7750 SR MP-BGP update is FALSE? Assume defaultbehavior.

A. An MP-BGP update carries an MPLS label that is used as the service label for a VPRN.B. There can be multiple Route Targets per route in an MP-BGP update.C. There can only be one Route Distinguisher per route in an MP-BGP update.D. On a specific PE, the MP-BGP updates for prefixes from a single VPRN carry different labels.E. Traditional BGP attributes and MP-BGP attributes are present in an MP-BGP update.



QUESTION 28Click the exhibit.

An Alcatel-Lucent 7750 SR is to be configured as a core router that supports VPRNs using LDP as thetransport protocol. Which of the following best describes this configuration?

A. This configuration is correct and complete.B. This configuration is correct, but the interfaces must also be configured in the "configure router mpls"

context.C. There is no configuration required for LDP in the core network.D. This configuration is correct but Targeted-LDP is also required.



QUESTION 29Which of the following VPRN label allocation methods are supported by the Alcatel-Lucent 7750 SR?

A. One label per VRF per routeB. One label per VRF per next-hopC. One label per VRFD. All of the aboveE. A and CF. B and C

Correct Answer: FSection: (none)Explanation


QUESTION 30When does a router add a Route Target to a route?

A. When the P receives the route from the PE.B. When the PE populates the route received from the CE into the VRF.

C. When the PE propagates the route to the CE.D. When the PE exports the route from the VRF into the MP-BGP table.



QUESTION 31A customer has two sites connected to PE-1 and a third site dual-homed to PE-2 and PE-3. If BGP is usedas the PE-CE protocol, what is the total number of BGP and MP-BGP sessions required on PE-1 for afunctional VPRN service? Assume that route reflection is not used.

A. 0 BGP and 2 MP-BGP sessionsB. 2 BGP and 0 MP-BGP sessionsC. 2 BGP and 1 MP-BGP sessionsD. 2 BGP and 2 MP-BGP sessionsE. 1 BGP and 2 MP-BGP sessions



QUESTION 32Which of the following about BGP Site of Origin (SoO) is FALSE?

A. The SoO attribute can be used to uniquely identify the site from which a PE learns routes.B. Before a PE redistributes a VPN-IPv4 route, it can assign an SoO attribute to the route.C. The SoO attribute can be used to prevent loops from a single site with multiple CE-PE connections.D. The SoO attribute can be used as matching criteria when redistributing routes from the CE to the PE.




Which of the following best describes the output?

A. The AS-Path is not present because a policy is configured on PE2 to set it to null.B. The AS-Path is not present because a policy is configured on CE1 to set it to null.C. The AS-Path is not present because a policy is configured on PE1 to set it to null.D. The AS-Path is not present because VPN-IPv4 routes do not propagate the IPv4 AS-Path BGP

attribute.




According to the display, a BGP loop is detected for route 192.168.1.0/27. On which router is this commandexecuted?

A. CE1B. CE2C. PE1D. PE2



QUESTION 35Which of the following about BGP loops in a VPRN environment is FALSE?

A. Traditional BGP loop detection mechanisms may detect a loop in the VPRN scenario, which in fact isnot present.

B. The Alcatel-Lucent 7750 SR accepts routes containing AS_PATH loops by default.C. When the CLI command "config>router>bgp# loop-detect discard-route" is used, the Alcatel-Lucent

7750 SR sends a notification to the remote peer and drops the BGP session.D. In VPRN implementations where the CE-PE protocol is BGP, it is possible for separate sites of the

same customer to use the same BGP autonomous system number.

Correct Answer: CSection: (none)

Explanation



Community lists are configured for the PE hub and spoke VPRN. Which communities should be exportedby the VPRN service on PE1?

A. "Spoke.Sites"and"Hub_Site"B. "Spoke_Sites"C. "Hub_Site"D. No communities should be exported



QUESTION 37Which of the following is a benefit of a hub and spoke VPRN topology?

A. Reduced number of VPN tunnels that need to be managed.B. Optimal routing between all sites.C. Limited configuration required on the hub PE device.D. Site to site redundancy support.




For the PE hub and spoke VPRN, on which PE(s) should the VPRN service command target export target:65100:1 import target: 65100: 2 " be configured?

A. PE1B. PE2,PE3 and PE4C. PE1,PE2, PE3 and PE4D. This command is not required for the configuration of this PE hub and spoke VPRN.



QUESTION 39Which of the following is not an available option for Route Distinguisher assignment?

A. One Route Distinguisher per VRF routeB. One Route Distinguisher per VRFC. One Route Distinguisher per VRF per siteD. One Route Distinguisher per VPN




The policy shown is configured on an Alcatel-Lucent 7750 SR to implement an extranet VPRN between themain sites of two separate VPRNs. Route target "target:65100:2" is used for Customer 1 routes, and routetarget "target:65100:3" is used for Extranet routes. How should this policy be applied?

A. The policy should be applied as an import policy on the PE connected to the main site of Customer 1.B. The policy should be applied as an import policy on all the PEs connected to the sites of Customer 1.C. The policy should be applied as an export policy on the PE connected to the main site of Customer 1.D. The policy should be applied as an export policy on all the PEs connected to the sites of Customer 1.




PE3 learns Internet routes via its VRF interface to the Internet peering router and stores them in its InternetVRF. CE1 is connected to the Red VPN and requires Internet access via its Red VRF interface. Which ofthe following statements do not fulfill this requirement?

A. PE1 advertises the Red VPN routes and a default route to PE3.B. The Internet VRF on PE3 imports the Red VPN routes advertised by PE1.C. PE1 imports all Internet routes and advertises them to CE1 via the Red VRF.D. PE3 advertises a default route from its Internet VRF instead of advertising all Internet routes.


Explanation/Reference:applicable.

QUESTION 42You are configuring a VPLS spoke termination to a VPRN on an Alcatel-Lucent 7750 SR. If LDP is used forall transport tunnels, what type of sessions are established by the VPRN PE router that is configured withthe spoke termination?

A. T-LDP and LDP sessions with the other VPRN PE routers and the VPLS PE routerB. T-LDP sessions with the other VPRN PE routers and the VPLS PE routerC. LDP sessions with the other VPRN PE routers and the VPLS PE routerD. LDP sessions with the other VPRN PE routers, and both T-LDP and LDP sessions with the VPLS PE

routerE. T-LDP and LDP sessions with the other VPRN PE routers and LDP sessions with the VPLS PE router



QUESTION 43A CE hub and spoke VPRN has two spoke sites; which of the following would be the best option toimplement this topology at the hub site PE?

A. One VPRN,one route distinguisher, and two route targetsB. Two VPRNs, one route distinguisher,and three route targets

C. Two VPRNs,two route distinguishers,and three route targetsD. One VPRN,two route distinguishers, and three route targets



QUESTION 44Which statement about assigning one Route Distinguisher per VPN is TRUE?

A. This approach is recommended when multiple sites advertise the same prefix.B. This approach limits the opportunities for load balancing.C. This approach requires additional memory on the PEs to store more routes.D. This approach is recommended for extranet VPN.



QUESTION 45Which of the following about a full mesh VPRN is FALSE?

A. Dual CEs connected to redundant PEs can provide redundancy within a single site.B. Site redundancy can be achieved by dual homing a single CE to one or more PEs.C. Provider core LSPs can be LDP-based or RSVP-based.D. The provider core maintains a full mesh of LSP tunnels and MP-BGP sessions between all P devices.




Internet access using route leaking between the VRF and the global routing table is configured in thenetwork. Which of the following is the correct output of route 192.168.50.1 in the global routing table ofPE3?

A. AB. BC. CD. D




An extranet VPRN is configured on Alcatel-Lucent 7750 SRs. On which router(s) should the displayedconfiguration be applied?

A. Router R1B. Router R2C. Routers R1 and R2D. Router R3E. Router R4



QUESTION 48Which of the following describes the goal of an Extranet VPRN?

A. To reduce the number of VPRN tunnels required.B. To allow routes to be exchanged between all, or selected, sites of one VPRN, and all, or selected, sites

of a second VPRN.C. To simplify the administration of multiple VPRNs.D. To allow network access between the headquarter sites of each VPRN service and a shared VPRN

service offered by a third party.


Explanation/Reference:

Explanation:


Router R4 is an Alcatel-Lucent 7750 SR configured for the extranet VPRN network. Which CLI command isexecuted on router R4 to produce the displayed output?

A. "show router 10 route-table"B. "show router route-table"C. "show router 20 route-table"D. There is no CLI command that can produce this output on router R4




For the inter-AS model A VPRN, which of the following is FALSE when CE2 sends an IP packet to192.168.1.1?

A. CE2 forwards an unlabeled IP packet to PE2 via the VPRN interface.B. PE2 pushes two labels on the IP packet and label-switches the packet to ASBR2.C. ASBR2pops one label from the IP packet and label-switches it to ASBR1.D. ASBR1 pushes two labels on the IP packet and label-switches the packet to PEL.





Which of the following about the inter-AS model A VPRN configuration on ASBR1 is TRUE?

A. The route-distinguisher value must be 64496:10 for successful VPRN operation.B. An export policy is not required for successful VPRN operation.C. The"family vpn-ipv4"command is required under the BGP configuration for successful VPRN operation.D. The neighbor address should be 10.10.10.4 under the BGP configuration for successful VPRN

operation.E. The VPRN configuration on ASBR1 is correct.



QUESTION 52Which of the following about inter-AS model AVPRN is TRUE?

A. It is the most scalable of the Inter-AS models.B. VRF configuration is not required on the ASBRs.C. Most routers that support VPRN functionality do not support model A by default.D. It is not necessary to run MPLS at the boundary between autonomous systems.



Explanation:

QUESTION 53Which of the following is NOT a viable option when implementing inter-AS VPRN?

A. MP-eBGP exchange of VPN-IPv4 routes between ASBRs residing in different autonomous systems.B. MP-eBGP exchange of labeled IPv4 routes between route reflectors residing in different autonomous

systems.C. A VRF-to-VRF connection at the autonomous system border routers.D. MP-eBGP exchange of VPN-IPv4 routes between PEs residing in different autonomous systems.




For the inter-AS model A VPRN. BGP is used as the PE-CE routing protocol. Which of the followingstatements about the control plane operation is TRUE?

A. PE1 sends an IPv4 update for prefix 192.168.1.0/27 via MP-BGP to ASBR1.B. ASBR1 sends an IPv4 update for prefix 192.168.1.0/27 to ASBR2.C. ASBR1 transforms an IPv4 update for prefix 192.168.1.0/27 to a VPN-IPv4 route; allocates VPN label

V1 and sends the update to ASBR2.D. ASBR2 accepts a VPN-IPv4 update from ASBR1, then sends the update to PE2 via MP-BGP.




Which of the following commands produces the output for the inter-AS model B VPRN?

A. ASBR1# show router 10 bgp routes vpn-ipv4B. ASBR1# show router bgp routesC. ASBR1# show router bgp routes vpn-ipv4D. ASBR1# show router route-table



QUESTION 56Which of the following about inter-AS model B VPRN is FALSE?

A. Model B does not require the configuration of VPRN instances on the ASBRs.B. The ASBRs exchange data packets that are encapsulated with a transport label and a service label.C. The route target advertised in one AS is maintained and used in the remote AS.D. The CLI command "configure router bgp enable-inter-as-vpn" is required on the ASBRs.



Explanation:


For the inter-AS model B VPRN, which of the following protocols is used to advertise routes between PE1and ASBRI?

A. iBGPB. eBGPC. MP-iBGPD. MP-eBGP




For the inter-AS model B VPRN, which of the following is FALSE when CE2 sends an IP packet to192.168.1.1?

A. PE2 pushes one label on the IP packet and forwards it to ASBR2.B. ASBR2 forwards the IP packet with one label to ASBR1.C. ASBR1 forwards the IP packet with two labels to PELD. PE1 forwards an unlabeled IP packet to CE1.



QUESTION 59Which of the following about inter-AS model B VPRN is TRUE?

A. The ASBRs use MP-eBGP to peer with each other and exchange IPv4 routes between autonomoussystems.

B. The ASBRs use MP-iBGP to peer with PE routers in their autonomous system and exchange VPN- IPv4routes.

C. The ASBRs maintain a mapping of labels for IPv4 routes exchanged between autonomous systems.D. The ASBRs require per-VPRN configuration.




For the inter-AS model C VPRN, which router is configured as shown?

A. PE1B. RR1C. ASBR1

D. ASBR2



QUESTION 61Which of the following is a characteristic of inter-AS model C VPRN?

A. A data packet destined to a remote AS is encapsulated with three labels within the originating AS.B. The ASBR redistributes VPN-IPv4 updates to its ASBR eBGP peers.C. PE routers in different ASes exchange IPv4 routes directly between each other using eBGP.D. The advertising ASBR assigns a new label to the route before sending it via an MP-eBGP update to its

ASBR peer.




For the inter-AS model C VPRN, which of the following is FALSE when an IP packet is sent from 192.1.1.1to 192.2.1.1?

A. PE1 pushes three labels on the IP packet: a VPN label, a BGP label, and an LDP transport label.B. ASBR1 pops the LDP and BGP labels and swaps the VPN label.C. ASBR2 pops the BGP label and pushes an LDP transport label.D. PE2 pops two labels and forwards the unlabeled packet to its destination.



Explanation:


For the inter-AS model C VPRN, which of the following statements about a data packet sent from CE1toCE2isTRUE?

A. PE1 sends the data packet with three labels: the bottom label is a service label, the middle label is aBGP label, and the top label is an LDP label.

B. ASBR1 sends the data packet with one label: the BGP label.C. ASBR1 sends the data packet with one label: the service label.D. ASBR2 sends the data packet with three labels: the bottom label is a service label, the middle label is a

BGP label, and the top label is an LDP label.



QUESTION 64Which of the following about inter-AS model C VPRNs is FALSE?

A. Within each AS, the ASBR advertises the system addresses of remote PE routers as labeled IPv4routes.

B. PE routers in different ASs exchange VPRN routing information directly over MP-eBGP.C. Within each AS,MP-iBGP sessions are established to exchange VPN-IPv4 prefixes between the PE

routers.D. ASBRs exchange the system addresses of PE routers as VPN-IPv4 routes over MP-eBGP.




A Carrier Supporting Carrier (CSC) VPRN is configured on an Alcatel-Lucent 7750 SR for a customercarrier offering VPRN services. Which of the following about this configuration is FALSE?

A. In the CSC VPRN,configure an eBGP session between CSC-PE and CSC-CE and use the "advertise-label vpn-ipv4"CLI command to enable the advertisement of VPN-IPv4 routes.

B. When the customer carrier uses the same autonomous system number in various sites, use the"loop-detect off" CLI command to disable the loop detection functionality on CSC-CE and PE routers.

C. On the CSC-PE routers, use the"carrier-carrier-vpn"CLI command to configure the VPRN service asCSC.

D. Configure an iBGP session between PE1 and PE2 and use the"family vpn-ipv4"CLI command to directlyexchange end-customer routes learned from CE1 and CE2.



QUESTION 66For Carrier Supporting Carrier (CSC) VPRN, which of the following is NOT applicable to both types ofcustomer carriers: BGP/MPLS service providers and Internet service providers?

A. eBGP is used for route and label exchange between CSC-CE and CSC-PE routers.B. iBGP can be used to distribute routes between CSC-CE and PE routers.C. MP-iBGP is used to advertise routes between the CSC-PE routers.D. MP-iBGP is used to advertise end-customer and Internet routes directly between the PE routers.



QUESTION 67For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is an ISP that provides Internetconnectivity to its end-customers, which of the following is FALSE?

A. All traffic exchanged between end-customers is carried over a single CSC VRF.B. Customer carrier PE routers residing in different sites must run eBGP between them to exchange

customers' routes.C. The customer carrier network can be a pure IP network.

D. MPLS can be used in the customer carrier network to improve scalability.




A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet ServiceProvider (ISP). If CE1 sends an IP packet to 192.60.100.1, which of the following is FALSE?

A. PE1 pushes an LDP transport label.B. CSC-CE1 pops the LDP label and pushes a BGP label.C. CSC-PE1 pops the BGP label and pushes two labels: a VPN label and an MPLS transport label.D. CSC-PE2 pops the MPLS label and pushes a BGP label.




A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet ServiceProvider (ISP). Which route is NOT present in PE1's global routing table?

A. 192.60.100.0B. 10.10.10.6C. 10.10.10.3D. 192.50.1.1




A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is a BGP/MPLS serviceprovider. If CE1 sends an IP packet to 192.168.200.1, which of the following is FALSE?

A. CE1 forwards the data packet to PE1 via the VPRN 20 interface.B. PE1 pushes two labels on the IP packet: a BGP label and an LDP transport label.C. CSC-CE1 pops the LDP label and swaps the BGP label.

D. CSC-PE1 pops the BGP label and pushes a VPN label and an MPLS transport label.




A Carrier Supporting Carrier (CSC) VPRN is configured on an Alcatel-Lucent 7750 SR for a customercarrier who is an Internet Service Provider (ISP). Which of the following configuration steps is NOTrequired?

A. Configuring iBGP sessions between PEs residing in different customer carrier sites,B. Configuring a policy on each CSC-CE to advertise local PE addresses to the network provider.C. Configuring a CSC VPRN on each CSC-PE with a SAP interface towards the attached CSC-CE.D. Configuring an IES service on PEL



QUESTION 72In a Carrier Supporting Carrier (CSC) VPRN, which of the following is a benefit to the network provider?

A. No need to build and maintain its own backbone.B. The solution scales as the number of serviced customer carriers increases.C. The solution scales as the number of VPNs offered by the customer carriers increases.D. The ability to manage end-customer services.



QUESTION 73Which of the following about the control plane in Carrier Supporting Carrier (CSC) VPRN is FALSE?

A. End-customer routes are populated in the network provider CSC VRF.B. The customer carrier does not learn any network provider internal routes.C. The network provider learns customer carrier PE system addresses.D. Routes exchanged between the customer carrier and the network provider are labeled.




For the Carrier Supporting Carrier (CSC) VPRN, which routes are advertised between CSC-CE1 andCSC-PE1?

A. VPN-IPv4 routes for all PE system addresses in AS 1000B. BGP labeled IPv4 routes for all PE system addresses in AS 1000C. VPN-IPv4 routes for all PE system addresses in AS 5000D. BGP labeled IPv4 routes for all PE system addresses in AS 5000



QUESTION 75Which of the following about Carrier Supporting Carrier (CSC) VPRN is FALSE?

A. CSC eliminates the need for customer carriers to build and maintain their own MPLS backbone.B. CSC is also known as carrier's carrier or carrier serving carrier.C. The customer carrier provides VPN or Internet services to its end-customers.D. A CSC VPRN is configured on the customer carrier's CSC-CE routers.



QUESTION 76

Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is a BGP/MPLS serviceprovider. Which route is present in PE1's global routing table?

A. 192.168.10.1B. 192.168.20.1C. 10.10.10.1D. 10.10.10.6



QUESTION 77For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is a BGP/MPLS VPN ServiceProvider (SP), which of the following is FALSE?

A. The customer carrier network can be a pure IP network.B. The customer carrier provides Layer 2 and Layer 3 services to its end-customers.C. A single CSC VPRN is configured on the network provider to support all services offered by the

customer carrier.D. In the case where the customer carrier offers VPRN services, the model is referred to as hierarchical

VPRN.



QUESTION 78For the data packets in a VPRN, how is the inner label in an MPLS packet signaled?

A. Signaled via MP-BGP and used to identify the egress PE.B. Signaled via T-LDP and used to identify the customer VPRN.C. Signaled via MP-BGP and used to identify the customer VPRN.D. Signaled via RSVP and LDP and used to identify the egress PE.E. Signaled via RSVP and LDP and used to identify the customer VPRN.



QUESTION 79VPN-IPv4 addressing is made unique by defining an address structure consisting of:

A. A 64-bit Route Target followed by a 32-bit IPv4 address.B. A 64-bit Route Distinguisher followed by a 32-bit IPv4 address.C. A 32-bit Route Distinguisher followed by a 32-bit IPv4 address.D. A 32-bit Route Target followed by a 32-bit IPv4 address.



QUESTION 80On an Alcatel-Lucent 7750 SR, which CLI command displays the Route Target(s) associated to a prefix?

A. Show router bgp routesB. Show router route-table summaryC. Show router bgp routes vpn-ipv4 detailD. Show router route-table




If the displayed command is executed, what is the correct value of AS-Path in the BGP route 172.12.0.0/16advertised by PE2?

A. 64491 {64492 64493}B. 64491C. 64492 64493 64491D. {64492 64493)64491




An Alcatel-Lucent 7750 SR is to be configured as a PE router that supports VPRNs using LDP as thetransport protocol. Which of the following best describes this configuration?

A. This configuration is correct and complete.B. This configuration is correct, except that the system interface must be added.C. This configuration is correct, except that the interfaces facing the CE routers must be added.D. MPLS configuration is not required.



QUESTION 83Which of the following is not a valid BGP design for a network provider supporting VPRNs?

A. Full mesh of MP-BGP between all P devicesB. Full mesh of MP-BGP between PE devicesC. Route reflector configuration between PE devicesD. Confederation configuration between PE devices



QUESTION 84When VPRN Outbound Route Filtering (ORF) is enabled, each PE sends its ORF list to its peer usingwhich of the following BGP message types?

A. OpenB. UpdateC. Route RefreshD. Notification




The AS-path nullification method is used to prevent CE2 from discarding routes received from CE1. Onwhich router should the AS-path nullification policy be configured?

A. CE1B. PE2C. PE1D. CE2



QUESTION 86Which of the following about BGP loops in a VPRN environment is TRUE?

A. Traditional BGP loop detection mechanisms are unable to detect a loop in a VPRN scenario.B. BGP loops are detected in a VPRN when the customer has separate sites using the same BGP

autonomous system number.

C. The Alcatel-Lucent 7750 SR rejects routes containing AS_PATH loops by default.D. When"remove-private"is configured at a PE, all routes received from the associated CE will have private

AS numbers removed.




AS-override is configured on PE1 to eliminate the BGP loops. What is the expected AS-Path in the VPN-IPv4 route 64496:10:192.168.2.0/27 received by PE1?

A. 64496 64497B. 64496C. 64497D. 64497 64497




The headquarter sites of VPRN 10 and VPRN 20 ate part of an extranet VPRN. Which of the followingcommunities are included in the export policy applied to VPRN 10 on router R1?

A. "Extranet-VPN-Blue" and "Extranet-VPN-Green"B. "Blue-Only"C. "Extranet-VPN-Blue"D. "Blue-Green"




For the PE hub and spoke VPRN, which communities should be imported under the VPRN service on PE2?

A. "Spoke.Sites"and"Hub_Site"B. "Hub_Site"C. "Spoke_Sites"D. No communities should be imported




All sites in the displayed network require Internet access. Route reflector 1(RR1) is used for Internet routesonly and route reflector 2(RR2) is used for VPN routes only. Which of the following is FALSE?

A. BGP sessions between RR1 and PE routers support only the IPv4 address family.B. BGP sessions between RR2 and PE routers support only the VPN-IPv4 address family.C. RR2 establishes BGP sessions with PEL PE2 and PE3.D. RR1 establishes BGP sessions only with PE1 and PE2.




One Route Distinguisher is assigned per VRF. If CE1 and CE2 advertise prefix 10.1.1.0/24, which of the

following statements is FALSE?

A. PE1 and PE2 advertise the same VPN route to the route reflector.B. The route reflector receives two routes for prefix 10.1.1.0/24; one from PE1 and one from PE2.C. The route reflector reflects two routes for prefix 10.1.1.0/24.D. PE3 receives two routes and is able to load balance traffic across PE1 and PE2.




Which of the following statements about the implementation of the CE hub and spoke topology is FALSE?

A. PE1 advertises spoke routes to CE1.B. The primary VRF on PE1 is used to route data packets from the hub CE to the spoke sites.C. The secondary VRF on PE1 contains routes learned from the spoke sites.D. Spoke sites do not learn routes from other spoke sites directly.




The displayed output is from an ASBR supporting an inter-AS model A VPRN. Which of the followingstatements about this output is TRUE?

A. The neighbor shown is an ASBR router.B. The address family between the peers should be VPN-IPv4 instead of IPv4.C. The neighbor address cannot be the interface address 10.3.4.4.D. The omitted AS number under "BGP summary" must be equal to 64496.




For the inter-AS model A VPRN shown, which of the following about the route advertisement of192.168.1.0/27 is FALSE?

A. PE1 advertises 64496:1:192.168.1.0/27 route update to ASBR1.B. PE2 advertises 192.168.1.0/27 route update to CE2.

C. ASBR1 advertises 64496:1:192.168.1.0/27 route update to ASBR2.D. ASBR2 advertises 64497:1:192.168.1.0/27 route update to PE2.


Explanation/Reference:justified answer.

QUESTION 95Which of the following about inter-AS model A VPRN is FALSE?

A. It requires the configuration of back-to-back VRFs between ASBR routers in different autonomoussystems

B. It is the most scalable of the Inter-AS models.C. Most routers that support VPRN functionality support model A by default.D. It uses conventional eBGP to distribute unlabeled IPv4 routes between ASBR routers in different

autonomous systems.


Explanation/Reference:correct answer.


For the inter-AS model B VPRN, which of the following is the correct BGP configuration on ASBR1?

A. Option AB. Option BC. Option CD. Option D

Correct Answer: C

Section: (none)Explanation



For the Inter-AS model B VPRN, which of the following about the inter-as-label output on ASBR1 is TRUE?

A. ASBR1 includes label 131069 in the route update sent to ASBR2.B. ASBR1 includes label 131068 in the route update sent to ASBR2.C. ASBR1 includes label 131068 in the route update sent to PELD. ASBR1 includes labels 131068 and 131069 in the route update sent to ASBR2.



QUESTION 98Which of the following about inter-AS model C VPRN is FALSE?

A. ASBRs exchange labeled IPv4 routes for the system addresses of PE routers.B. It requires a route reflector to be configured in each AS for successful operation.C. VPN-IPv4 routes are neither maintained nor distributed by the ASBRs.D. PE routers in different ASes exchange VPN-IPv4 routes directly between each other using MP- eBGP.





A. Configuring iBGP sessions between PEs residing in different customer carrier sites.B. Configuring a policy on each CSC-CE to advertise local PE addresses to the network provider.C. Configuring a CSC VPRN on each CSC-PE with a SAP interface towards the attached CSC-CE.D. Configuring an IES service on PEL



QUESTION 100For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is an ISP that provides Internetconnectivity to its end-customers, which of the following is FALSE?

A. Customer carrier PE routers residing in different sites must run iBGP between them to exchangecustomers' routes.

B. MPLS can be used in the customer carrier network to improve scalability.C. The customer carrier network can be a pure IP network.D. A CSC VPRN is configured on the CSC-CE to forward data packets to the network provider.




A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is a BGP/MPLS serviceprovider. Which of the following describes the routes present in PE1's global routing table?

A. The system address of PE2 is present. The system addresses of CSC-PE1 and CSC-PE2 are notpresent.

B. The system addresses of PE2, CSC-PE1 and CSC-PE2 are all present.C. The system address of CSC-CE1,the route 192.168.10.1, and the route 192.168.20.1 are all present.D. The system address of PE2 and the route 192.168.20.1 are present.




For the Carrier Supporting Carrier (CSC) VPRN, which routes are advertised from CSC-CE1 toPE1?

A. IGP/LDP or labeled BGP routes for all PE system addresses in AS 5000 Site BB. VPN-IPv4 routes for all PE system addresses in AS 5000 Site BC. IGP/LDP or labeled BGP routes for all PE system addresses in AS 1000D. VPN-IPv4 routes for all PE system addresses in AS 1000




A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is a BGP/MPLS serviceprovider. If CE1 sends an IP packet to 192.168.200.1, which of the following is FALSE?

A. PE1 pushes a VPN label, a BGP label, and an LDP transport label on the IP packet.B. CSC-CE1 pops the LDP label and swaps the BGP label.C. CSC-PE1 pops the BGP label, swaps the VPN label, and pushes an LDP transport label.D. CSC-PE2 pops the LDP and VPN labels and pushes a BGP label.




A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet ServiceProvider (ISP). If CE1 sends an IP packet to 192.60.100.1, which of the following is FALSE?

A. PE1 pushes an LDP transport label.B. CSC-PE1 pops the BGP label and pushes two labels: a VPN label and an MPLS transport label.C. CSC-PE2 pops the MPLS transport label and pushes a BGP label.D. CSC-CE2 pops the BGP label and pushes an LDP transport label.



QUESTION 105Which of the following about the Route Target is TRUE?

A. The Route Target is added to an IPv4 route to create the VPN-IPv4 route.B. The Route Target is an extended community string that identifies VPN membership.C. A route can have only one Route Target.D. The Route Target is a 64-bit value added to customer prefixes to make them unique.



QUESTION 106How are local CE routes associated with the appropriate VRF at the PE?

A. Based on the interface on which they are received.


B. Based on the Route Distinguisher.

C. Based on the Route Target.D. Based on the Service Identifier.



QUESTION 107On a PE router, the VRF table for VPRN 10 contains: one local route, two BGP routes learned from a localCE. and three tunneled routes learned from a remote site. If we execute the command "configure servicevprn 10 maximum-routes 2 log-only" on this PE router, how many routes are expected to be in the VRF?

A. Five routes: the local route, the two BGP routes learned from the local CE,and two tunneled routes.B. Six routes: the local route, the two BGP routes learned from the local CE, and three tunneled routes.C. Two routes: the local route and one tunneled route.D. Three routes: the local route and two tunneled routes.E. Two routes: the local route and one BGP route learned from the local CE.




What is wrong with the VPRN configuration applied on this Alcatel-Lucent 7750 SR?

A. The VPRN ID must match the value used in the vrf-target command.B. The VPRN ID must match the value used in the route-distinguisher command.

C. The router-id command should not be used in this context.D. The "no shutdown" command must be configured for the VPRN to be operationally UP.



QUESTION 109A service provider core consists of 6 PE and 4 P routers. Assuming route reflection is not used, how manyinternal BGP sessions are required in the service provider network for a correct operation of VPRNservices?

A. 1B. 5C. 15D. 30E. 45




Based on the displayed configuration, which routes does PE3 place in the VPRN 10 routing table?

A. The routes learned from CE3 and PE1.B. The route learned from CE3 only.C. The routes learned from PE1 and PE2.D. The routes learned from CE3 and PE2.



QUESTION 111In a VPRN that uses MPLS transport tunnels, which of the following is NOT configured on the PE device?

A. MP-BGP for exchanging customer routes with other PEs.B. A routing protocol for exchanging customer routes with the CE.C. A label signaling protocol for defining transport tunnels between the PE and CE.D. MPLS for exchanging labels with other provider core devices.



Explanation:

QUESTION 112Based on the VPRN BGP decision process, which of the following routes is selected first if the command"PE1>config>service>vprn> bgp best-path-selection as-path-ignore" is executed?

A. The route learned from an eBGP peer.B. The route with the lowest Origin.C. The route with the lowest originator ID or BGP Identifier.D. The route with the shortest AS path.




Assuming that the as-override command is used, what is the most likely location of prefix 10.1.2.0/24?

A. The prefix is located in an Autonomous System directly connected to this router.B. There is a single Autonomous System between the local AS and the AS that originated the prefix.C. There are two Autonomous Systems between the local AS and the AS that originated the prefix.D. The prefix is located in Autonomous System 65100.



QUESTION 114

Which of the following about the configuration of BGP Site of Origin (SoO) is TRUE?

A. Each PE must implement a policy to apply a unique SoO attribute to the set of routes received fromeach customer site.

B. A different BGP extended community is used on each PE that connects to a single site.C. An import policy on the PE rejects a route if the attached SoO matches the configured value.D. Import and export policies are applied on the PEs under the global BGP context.




How many route targets and route distinguishers are required to implement the extranet VPRN?

A. Three route targets and three route distinguishersB. Five route targets and three route distinguishersC. Three route targets and two route distinguishersD. Five route targets and two route distinguishers




When configuring the double lookup functionality, which configuration forces the global routing table to beconsulted for any packet matching the VPRN default route?

A. AB. BC. CD. D




Which VPRN type produces the output shown on router R1?

A. A full mesh VPRNB. APE hub and spoke VPRNC. An extranet VPRND. ACE hub and spoke VPRN



QUESTION 118If Route Reflector 1 (RR1) is used for Internet routes, and Route Reflector 2 (RR2) is used for VPN routes,which of the following is TRUE?

A. BGP sessions established between RR2 and the PEs support IPv4 and VPN-IPv4 address families.B. BGP sessions established between RR1 and the PEs support the IPv4 address family only.C. BGP sessions established between RR1 and the PEs support IPv4 and VPN-IPv4 address families.D. BGP sessions established between RR2 and the PEs support the IPv4 address family only.



QUESTION 119Which of the following about a full mesh VPRN design is FALSE?

A. Each customer site has a logically direct route to every other customer site.B. It provides optimal routing between all sites.C. It allows access between all CE devices and all sites participating in the same VRF.D. It requires a full BGP mesh in the provider core.




Routers RR1 and RR2 are configured as route reflectors. For the inter-AS model C VPRN, which of thefollowing about the VPN-IPv4 route advertisement is FALSE?

A. RR2 advertises the VPN-IPv4 route update of 192.2.1.0/27 to RR1B. RR1 advertises the VPN-IPv4 route update of 192.1.1.0/27 to RR2C. RR2 advertises the VPN-IPv4 route update of 192.1.1.0/27 to PE2D. PE1 advertises the VPN-IPv4 route update of 192.1.1.0/27 to RR1 and ASBRL



QUESTION 121Which of the following about the configuration of an inter-AS model C VPRN is FALSE?

A. MP-iBGP sessions must be configured between the PE routers in each AS.B. LDP must be configured in each AS.C. MP-eBGP sessions must be configured between the ASBRs.D. The ASBRs must be configured with"enable-inter-as-vpn".



QUESTION 122Which of the following about Carrier Supporting Carrier (CSC) VPRN is FALSE?

A. CSC does not allow a customer carrier to offer Layer 2 services to its end customers.B. A CSC VPRN is configured on the network provider's CSC-PE routers.C. CSC eliminates the need for customer carriers to build and maintain their own MPLS backbone.D. The network provider provides an MPLS VPN backbone to the customer carrier.




A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet ServiceProvider (ISP). Which of the following about route distribution is FALSE?

A. The VRF 10 on CSC-PE1 includes PE1 and PE2's system addresses.B. The global routing table of PE1 includes PE2's system address.C. The VRF 10 on CSC-PE2 includes CEI'S address.D. The global routing table of PE2 includes CE1's address.



QUESTION 124In a Carrier Supporting Carrier (CSC) VPRN, which of the following is a benefit to the customer carrier?

A. The ability to offer Internet connectivity and a variety of services over a single CSC VPRN interface.B. The ability to maintain its own backbone.C. The ability to learn system addresses of network provider PEs.D. There is no need to manage end-customer services.



QUESTION 125What operation does a P device perform when it receives a labeled packet for a VPRN service?

A. It forwards the packet based on the label signaled by MP-BGP.B. It decrements the TTL and forwards the packet based on the inner label.C. It swaps the outer label then forwards the packet.D. The P router does not perform any operations on labeled packets.




The CLI command "remove-private" is configured on PE1 to eliminate BGP loops in the VPRN. For thedisplayed route, what is the value of the AS-Path field?

A. 64496 64512B. 64512C. 64496D. 64512 64496




Internet access is provided to the Red VPRN (ID 10) via an Internet VRF (ID 500). For this configuration,which communities must be imported on the Red and Internet VRFs?

A. Red VRF imports only"Internet"Internet VRF imports only"Red-Only"B. Red VRF imports"Internet"and"Red-Only"Internet VRF imports only"Red-Only"C. Red VRF imports only "Red-Only"Internet VRF imports"Red-Only"and"Internet"D. Red VRF imports"Internet"and"Red-Only"Internet VRF imports only"Internet"




The headquarter sites of VPRN 10 and VPRN 20 are part of an extranet VPRN. Which route targets shouldbe exported under the VPRN 20 service on router R1?

A. Target:65100:2 and target:65100:3B. Target:65100:1 and target:65100:2C. Target:65100:1 and target:65100:3D. Target:65100:1, target:65100:2 and target:65100:3




For the extranet VPRN and community lists shown, which of the following communities will be included inthe export policy applied to VPRN 20 on router R2?

A. "Blue-Only"B. "Blue-Only" and "Blue-Green"C. "Green-Only"D. "Extranet-VPN-Green"E. "Blue-Green"




Routers RR1 and RR2 are configured as route reflectors. For the inter-AS model C VPRN, which of thefollowing about the BGP sessions established between the routers is TRUE?

A. ASBR2 has a total of three BGP sessions established: one with PE2, one with RR2, and one withASBR1.

B. RR1 has a total of three BGP sessions established: one with PEL one with RR2, and one with ASBRLC. PE2 has a total of two BGP sessions established: one with RR2 and one with ASBR2.D. PE1 has a total of two BGP sessions established: one with RR1 and one with PE2.



QUESTION 131Which of the following about VPRN Outbound Route Filtering (ORF) is FALSE?

A. Resources consumed at the sender and receiver PEs can be reduced by using BGP ORF.B. BGP ORF allows a receiving PE to filter out unnecessary inbound routes.C. A PE indicates its ORF capabilities to its neighbor PE in a BGP Open message.D. BGP ORF is most effective when a large number of routes is being exchanged between two peers, and

most routes are filtered out on arrival.



QUESTION 132Which of the following protocols are supported by the Alcatel-Lucent 7750 SR for the creation of transporttunnels within an autonomous system?

A. MP-BGP, LDP,RSVP-TEB. LDP, RSVP-TE,GREC. MP-BGP, RSVP-TE,GRED. MP-BGP, LDPE. MP-BGP only

Correct Answer: BSection: (none)

Explanation


QUESTION 133What are the two primary problems the service provider must consider when providing traditional Layer 3VPN services using only a single common routing table in the provider core? (Choose two)

A. Memory exhaustion in the provider coreB. Route leaking between the customer networksC. CPU utilization for route processingD. Unwanted packet forwarding between customer networks

Correct Answer: BDSection: (none)Explanation


QUESTION 134When a Service Provider offers VPRN services to its customers, which of the following functions areexpected to be the responsibility of the Service Provider? (Choose three)

A. Distributing the customer generated labels between sitesB. Distributing the customer routing information betweenC. Forwarding the customer originated data packets to the appropriate destinationD. Forwarding the provider originated data packets to the appropriate customer siteE. Providing secure layer 3 routing exchange between sites

Correct Answer: BCESection: (none)Explanation


QUESTION 135In a Carrier Supporting Carrier (CSC) VPRN, which of the following is NOT a benefit to the networkprovider?

A. The solution scales as the number of VPNs offered by the customer carriers increases.B. The solution scales as the number of end-customer routes increases.C. There is no need to manage end-customer services.D. The solution scales as the number of serviced customer carriers increases.



QUESTION 136Based on the VPRN BGP decision process, which of the following routes is selected first?

A. The route with the shortest AS path.B. The route with the lowest route or tunnel table cost to the NEXT_HOP.

C. The route with the highest local preference.D. The route with the lowest originator ID or BGP identifier.



QUESTION 137Which of the following about inter-AS model B VPRN is FALSE?

A. Model B does not require the configuration of VPRN instances on ASBRs.B. The ASBRs peer with each other to transport VPN-IPv4 routes between autonomous systems.C. PE routers distribute VPN-IPv4 routes to their local ASBR.D. One single ASBR is required in each AS to hold the routes for all VPRNs.




A Carrier Supporting Carrier (CSC) VPRN is configured on an Alcatel-Lucent 7750 SR for a customercarrier offering VPRN services. Which of the following configuration steps is NOT required?

A. Creating an export policy on CSC-CE1 and CSC-CE2 to advertise local PE addresses to the networkprovider.

B. Configuring eBGP between CSC-CE and CSC-PE routers; setting the address family to IPv4; andenabling the advertisement of labels for IPv4 routes.

C. Configuring iBGP between PE and CSC-CE within each customer carrier site; setting the address familyto IPv4; and enabling the advertisement of labels for IPv4 routes.

D. Configuring MP-iBGP between PE1 and PE2; setting the address family to IPv4; and enabling theadvertisement of labels for IPv4 routes.





A. Configuring labeled eBGP sessions between CSC-CE and CSC-PE routers.B. Configuring a policy on each CSC-CE to advertise local PE addresses to the network provider.C. Configuring labeled iBGP sessions between PEs residing in different customer carrier sites.D. Advertising the received system addresses of remote PEs using either iBGP or IGP/LDP within each

customer carrier site.




For the inter-AS model C VPRN, which of the following is FALSE when an IP packet is sent from 192.1.1.1to 192.2.1.1?

A. PE1 pushes two labels on the IP packet and forwards it to ASBR1.B. ASBR1 pops the LDP label, swaps the BGP label and forwards the IP packet to ASBR2.C. ASBR2 forwards the IP packet with two labels to PE2.D. PE2 pops the labels and forwards the unlabeled IP packet to its destination.




Which of the following best describes the output from the Alcatel-Lucent 7750 SR?

A. RSVP-TE has signaled a VPRN label.B. RSVP-TE has signaled both VPRN and LSP labels.C. MP-BGP has signaled both VPRN and LSP labels.D. MP-BGP has signaled a VPRN label.



QUESTION 142For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is an ISP that provides Internetconnectivity to its end-customers, which of the following is TRUE?

A. The customer carrier network must be MPLS-enabled.B. VPRN instances are created on the CSC-CE routers.C. All traffic exchanged between end-customers is carried over a single CSC VRF.D. Customer carrier PEs residing in different sites must run MP-iBGP between them to exchange

customers' routes.



QUESTION 143In a VPRN the PE device is configured to run which of the following protocols? (Choose three.)

A. MP-BGP for exchanging customer routes with other PEsB. A routing protocol for exchanging customer routes with the CEC. MPLS for exchanging labels with other provider core devicesD. MPLS for exchanging labels with the CE devicesE. Targeted LDP for exchanging VPRN labels with other PE devicesF. A label signaling protocol for defining transport tunnels between PE and CE devices

Correct Answer: ABCSection: (none)Explanation


QUESTION 144Choose the answer that best completes the following sentence. The CE device is typically configured with_________________.

A. A single routing protocol for exchanging routes with both the internal customer routers and with the PEB. MP-BGP to exchange routes with the PE.C. MPLS and a routing protocol for the exchange of labels and routes with the PED. MPLS for exchanging labels with other CE devicesE. A routing protocol for exchanging routes with the internal customer routers and a routing protocol for

exchanging routes with the PE



QUESTION 145Which of the following terms also correctly describes a Layer 3 VPN?(Choose three)

A. VPRNB. BGP/MPLS VPNC. VLLD. VPLSE. IP-VPNF. ePipe

Correct Answer: ABESection: (none)Explanation

Explanation/Reference:great answer.

QUESTION 146What are the main functions of a Layer 3 VPN? (Choose three).

A. Distributing customer routing information between sitesB. Forwarding customer data packetsC. Providing an integrated billing solutionD. Maintaining separation between distinct customer networksE. Allowing the implementation of Layer 3 devices in the provider core

Correct Answer: ABDSection: (none)Explanation


QUESTION 147Which of the following statements are true regarding P devices in an MPLS VPRN? (Choose two.)

A. Participate in service provider core routingB. P devices are not required to be MPLS enabled. MPLS is only required on the PE devicesC. Run a common routing protocol with the CE routerD. Must support MP-BGPE. Do nothave any connections to the CEF. Must be aware of the VPRNs

Correct Answer: AESection: (none)Explanation


QUESTION 148In a traditional layer 3 VPN which of the following will be an issue when there is overlapping address spacebetween two customers? Choose the best answer.

A. There will be increased memory usage on the PEB. There will be increased CPU utilization on the PEC. The CE will reject the overlapping prefixD. The PE will not recognize the prefixes as being differentE. There is no issue with overlapping address space in a traditional Layer 3 VPN


Explanation/Reference:absolute.

QUESTION 149In a VPRN, how does the service provider ensure that customer addresses are unique when multiplecustomers use the same address space?

A. It is the customer responsibility to ensure their address space is uniqueB. The Route Distinguisher ensures that addresses are unique between customers.C. The Route Target ensures that addresses are unique between customersD. The provider will advise the customers to change their addressesE. The provider will use NAT to ensure that addresses are unique between customers


Explanation/Reference:totally agreed with the answer.

QUESTION 150Which of the following statements is true regarding the Route Distinguisher? (Choose three)

A. It is an 8 byte value containing 3 fieldsB. The Route Distinguisher must have the same value as the Route Target.C. The Administrator field contains either an AS number or an IP numberD. To ensure uniqueness, Route Distinguishers are assigned by the IANA.E. The Route Distinguisher is not used if the customer addresses do not overlapF. The Assigned Number field must contain a public IP address

Correct Answer: ABCSection: (none)Explanation

Explanation/Reference:totally true.


QUESTION 151In a VPRN, which of the following are supported as PE-CE routing methods on the Alcatel-Lucent 7750SR? (Choose four).

A. StaticB. RIPC. OSPFD. IS-ISE. MP-BGPF. BGP

Correct Answer: ABCFSection: (none)Explanation


QUESTION 152How was standard BGP modified to allow it to carry routing information for VPRNs?

A. By using the MED attribute to carry the OSPF metric.B. By defining Extended Communities for use as the Route TargetC. By using the Cluster List attribute to carry the network prefixD. By defining support for the VPN-IPv4 address familyE. By adding an additional field to the BGP Update to carry the VPRN label


Explanation/Reference:righteous.


The AS-override method is used to prevent BGP loops in the blue customer VPRN. Which statement aboutthe configuration is TRUE?

A. the configuration is complete and correct.B. 'as-override'should be configured under the BGP context.C. 'as-override'should be configured under the group context.D. 'as-override'should not be part of this configuration.



QUESTION 154Which of the following about scaling techniques for route reflectors is FALSE?

A. Logical Partitioning of route reflectors works best when PEs are partitioned to support different VPRNs.B. Logical Partitioning of route reflectors is simple and scalable, but requires more hardware.C. Filtering at route reflectors requires either inbound filtering at the route reflector or outbound filtering at

the PE routers.D. Filtering at route reflectors allows the route reflector to filter routes received from PEs and only accept

routes with a certain route distinguisher.


Explanation/Reference:assess.

QUESTION 155When using the AS-override method to prevent BGP loops in VPRNs, where should the "as-override" CLIcommand be configured?

A. On the PE facing the CE neighborB. On the CE facing the PE neighborC. On the P facing the PE neighborD. On the PE facing the PE neighbor


Explanation/Reference:assessed.


The headquarter sites of VPRN 10 and VPRN 20 are part of an extranet VPRN. Which route targets shouldbe exported under the VPRN 20 service on router R1?

A. target:65100:2 and target:65100:3B. target:65100:1 and target:65100:2C. target:65100:1 and target:65100:3D. target:65100:1, target:65100:2 and target:65100:3



QUESTION 157Which of the following VPRN topologies must a customer implement to allow a given VRF to include routesfrom different VPRNs?

A. Either a hub and spoke or an extranet VPRNB. An extranet VPRNC. A hub and spoke VPRND. Either a full mesh or a hub and spoke VPRN



QUESTION 158In inter-AS model C VPRN, which of the following about the command "advertise-label ipv4" is TRUE?

A. This command is required on all PE routers to distribute labeled IPv4 routes directly to PEs in remoteAS.

B. This command is required on the ASBRs to exchange labeled IPv4 routes between the ASs.C. This command is required on the route reflectors to exchange customer routes between ASs as labeled

IPv4 routes.D. This command is required on all PE routers to distribute labeled IPv4 routes to connected CEs.



QUESTION 159A provider core consists of 4 PE and 2 P routers. A fully meshed VPRN service is configured on all 4 PEs,and MPLS LSP-based SDPs are used for the service configuration. How many SDPs must be bound to theVPRN service on each PE?

A. Two SDPs must be bound to the VPRN service on each PE.B. Three SDPs must be bound to the VPRN service on each PE.C. Five SDPs must be bound to the VPRN service on each PE.D. Twelve SDPs must be bound to the VPRN service on each PE.


Explanation/Reference:amended answer.

QUESTION 160Which of the following about eiBGP Load Balancing is FALSE?

A. ecmp and multipath must be configured within the VPRN instance.B. The RD of the VPRN on the local PE must be different from the RDofthe remote PEs.C. Is enabled in the config>router>bgp context

D. Allows a PE router to load share traffic across routes learned from both direct CE-PE peerings and MP-BGP peerings.




When configuring a VPRN service on an Alcatel-Lucent 7750 SR, where should the policy be applied?

A. On the CE under the OSPF contextB. On the PE under the BGP contextC. On the PE under the OSPF contextD. On the CE under the BGP contextE. This policy is not required.



QUESTION 162In a VPRN that uses MPLS transport tunnels, which of the following statements about P devices is TRUE?

A. P devices participate in service provider core routing.B. P devices are not required to be MPLS-enabled.C. P devices must be aware of the VPRNs.D. P devices must support MP-BGP.




Based on the VPRN aggregate route configuration, which routes are advertised to CE2?

A. 172.12.10.0/24, 172.12.20.0/24 and 172.0.0.0/16B. 172.12.0.0/16 onlyC. 172.12.10.0/24 and 172.12.20.0/24D. 172.0.0.0/16 only



QUESTION 164Which of the following about the configuration of VPRN Outbound Route Filtering (ORB on an Alcatel-Lucent 7750 SR is TRUE?

A. The ORF configuration must be done under the BGP neighbor context only.B. When sending is enabled, the ORF function takes the route target list configured in all outbound policies

and pushes this list to the peer by default.C. When configuring ORF, the session with the peer must be cleared/reset for the new capability

negotiation to take place.D. When Outbound Route Filtering is configured, both the sending and acceptance of ORF are enabled by

default.



QUESTION 165Based on the VPRN BGP decision process, which of the following routes is selected first?

A. The route with the lowest MED.B. The route with the shortest AS Path.C. The route received from the lowest peer IP address.D. The route with the lowest Origin.



QUESTION 166Which of the following protocols does the Alcatel-Lucent 7750 SR support to signal VPRN service labels?

A. Targeted-LDPB. BGPC. MP-BGPD. RSVP-TE



QUESTION 167At what point does the Route Target become associated with a route?

A. When the route is first received at the P from the PEB. When the route from the CE is populated into the VRF at the PEC. When the route from the PE is populated into the VRF at the CED. When the route is propagated from the PE to the CEE. When the route is exported into the MP-BGP table from the VRF



justified.

QUESTION 168Which of the following describes how a route is handled when is received at the PE from the local CE?

A. It will be placed into the customer VRF and automatically propagated into the BGP tableB. It will be placed into the customer VRF and then be propagated to the BGP table only if BGP is used as

the PE-CE protocolC. It will be placed into the customer VRF and require an export policy to be propagated to the BGP tableD. It will be placed into the customer VRF and require an export policy to be propagated to the BGP table if

RIP is used as the PE-CE protocolE. It will be placed into the customer VRF and require an export policy to be placed into the BGP table if a

protocol other than BGP is used as the PE-CE protocol


Explanation/Reference:rectified answer.

QUESTION 169VPN-IPv4 addressing is made unique by defining an address structure consisting of:

A. A 32 bit IPv4 address followed by a 64 bit Route TargetB. A 32 bit IPv4 address followed by a 64 bit Route DistinguisherC. A 64 bit Route Target followed by a 32 bit IPv4 addressD. A 64 bit Route Distinguisher followed by a 32 bit IPv4 addressE. A 32 bit Route Distinguisher followed by a 32 bit IPv4 address FA 32 bit Route Target followed by a 32

bit IPv4 address


Explanation/Reference:straight answer.

QUESTION 170What is the purpose of the Route Distinguisher?

A. It defines the VPN membershipB. It defines which routes are imported into the vrfC. It defines which routes are exported from the vrfD. It is used to make IPv4 addresses uniqueE. It is used as the VPN label


Explanation/Reference:desirable answer.

QUESTION 171Where are VPN-IPv4 addresses used in a VPRN?

A. In the routing updates exchanged from CE to PEB. In the routing updates exchanged from PE to PE

C. In the routing updates exchanged from P to PED. In customer packets as they traverse the provider coreE. In all route tables of the VPRN control plane



QUESTION 172What is wrong with the configuration shown below?

A. The VPRN ID must be the same value as is used in the vrf-target commandB. The VPRN ID must be the same value as is used in the route-distinguisher commandC. The router-id command should not be used in this contextD. The vrf-target command is mandatoryE. There is nothing wrong with this configuration



QUESTION 173Which command will display the Route Target associated to a specific prefix on an Alcatel-Lucent 7750SR?

A. Show router bgp routesB. Show router bgp routes <prefix> detailC. Show router route-tableD. Show router <service-id> route-tableE. Either (b) or (d)




A. This is the base routing table from CE-1B. This is the base routing table from PE-1C. This is the customer vrf from CE-1D. This is the customer vrf from PE-1D.This is the customer vrf from PE-1E. This is the customer vrf from PE-2E.This is the customer vrf from PE-2E.This is the customer vrf from

PE-2F. This is the base routing table from PE-2F.This is the base routing table from PE-2F.This is the base

routing table from PE-2G. This is the base routing table from CE-2G.This is the base routing table from CE-2G.This isthe base

routing table from CE-2



QUESTION 175Assuming that as-override has been used, which of the following statements describes the most likelylocation of prefix 10.1.2.0/24, based on the output from an Alcatel-Lucent 7750 SR shown below?

A. It is located in an Autonomous System directly connected to this routerB. There is a single Autonomous System between the local AS and the AS that originated the prefixC. There are two Autonomous Systems between the local AS and the AS that originated the prefixD. There may be two or more Autonomous Systems between the local AS and the AS thatoriginated the

prefixE. It is located in Autonomous System 65100



QUESTION 176An SDP has been configured for a VPRN service using an existing MPLS LSP and the configuration shownbelow. Which of the statements below is true about the configuration on an Alcatel-Lucent 7750 SR?

A. The configuration is incomplete as the uto-bind command is missingB. The configuration is incomplete as the ignaling off command is missingC. The configuration is incorrect as VPRN service does not support spoke-sdp configuration using MPLS

LSPsD. The configuration is incorrect as Line 8 should be poke-sdp 42 mpls createE. The configuration is complete and correct




Actualtests.4A0-106 · Exam A QUESTION 1 Which method does the Alcatel-Lucent 7750 SR use for the...

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