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Nokia Virtual Private Routed Networks Question and Answers

Nokia Virtual Private Routed Networks

Last Update May 3, 2024
Total Questions : 214

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Questions 1

Click the exhibit.

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?

Options:

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"

Discussion 0
Questions 2

Click the exhibit.

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

Options:

A.  

Option A

B.  

Option B

C.  

Option C

D.  

Option D

Discussion 0
Questions 3

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

Options:

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 PE1.

D.  

ASBR1 includes labels 131068 and 131069 in the route update sent to ASBR2.

Discussion 0
Questions 4

Click the exhibit.

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

Options:

A.  

ASBR2 has a total of three BGP sessions established: one with PE2, one with RR2, and one with ASBR1.

B.  

RR1 has a total of three BGP sessions established: one with PEL one with RR2, and one with ASBRL

C.  

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.

Discussion 0
Questions 5

Which of the following is NOT a requirement for eiBGP load balancing to be effective?

Options:

A.  

The route distinguisher of the VPRN on the local PE must be different from the route distinguisher of the remote PEs.

B.  

ecmp must be configured within the VPRN instance.

C.  

eibgp-loadbalance must be configured within the VPRN instance.

D.  

ibgp-multipath must be configured within the VPRN instance.

Discussion 0
Questions 6

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

Options:

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.

Discussion 0
Questions 7

Click the exhibit.

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

Options:

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.

Discussion 0
Questions 8

Click the exhibit.

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

Options:

A.  

Three route targets and three route distinguishers

B.  

Five route targets and three route distinguishers

C.  

Three route targets and two route distinguishers

D.  

Five route targets and two route distinguishers

Discussion 0
Questions 9

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

Options:

A.  

It requires the configuration of back-to-back VRFs between ASBR routers in different autonomous systems

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.

Discussion 0
Questions 10

Which of the following commands may be used on an Nokia 7750 SR to display a network exported locally to BGP on the originating router? (Choose two)

Options:

A.  

Show router bgp routes

B.  

Show router bgp routes prefix

C.  

Show router bgp routes self-originated

D.  

Show router bgp routes hunt

E.  

Show router bgp neighbor advertised-routes

Discussion 0
Questions 11

Click the exhibit.

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

Options:

A.  

"Spoke.Sites" and "Hub_Site"

B.  

"Spoke_Sites"

C.  

"Hub_Site"

D.  

No communities should be exported

Discussion 0
Questions 12

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

Options:

A.  

Show service id base

B.  

Show router bgp routes

C.  

Show service id maximum-routes

D.  

Show router status

Discussion 0
Questions 13

Complete the following statement. In a VPRN, the label signaled by RSVP-TE is used to ______________.

Options:

A.  

Identify the egress PE in the MPLS domain

B.  

Signal the egress VPRN ID

C.  

Identify the ingress PE in the MPLS domain

D.  

Transport route updates between PEs

Discussion 0
Questions 14

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

Options:

A.  

Allow routes to be exchanged between all or selected sites of one VPRN and all or selected sites of a second VPRN

B.  

Allow the service provider to provide multiple VPRNs with Internet access

C.  

Reduce the number of VPRN tunnels required

D.  

Simplify the administration of multiple VPRNs

E.  

Force all traffic in multiple VPRNs to pass through a single device

Discussion 0
Questions 15

What is wrong with the configuration shown below?

Options:

A.  

The VPRN ID must be the same value as is used in the vrf-target command

B.  

The VPRN ID must be the same value as is used in the route-distinguisher command

C.  

The router-id command should not be used in this context

D.  

The vrf-target command is mandatory

E.  

There is nothing wrong with this configuration

Discussion 0
Questions 16

Click the exhibit.

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

Options:

A.  

On the CE under the OSPF context

B.  

On the PE under the BGP context

C.  

On the PE under the OSPF context

D.  

On the CE under the BGP context

E.  

This policy is not required.

Discussion 0
Questions 17

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

Options:

A.  

The routes to be shared are identified by common route targets

B.  

The routes to be shared are identified by common route distinguishers

C.  

The routes to be shared are identified by common AS numbers

D.  

The routes to be shared are identified by common VPN labels

Discussion 0
Questions 18

Click the exhibit.

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?

Options:

A.  

PE1

B.  

PE2, PE3 and PE4

C.  

PE1, PE2, PE3 and PE4

D.  

This command is not required for the configuration of this PE hub and spoke VPRN.

Discussion 0
Questions 19

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

Options:

A.  

Distributing the customer generated labels between sites

B.  

Distributing the customer routing information between

C.  

Forwarding the customer originated data packets to the appropriate destination

D.  

Forwarding the provider originated data packets to the appropriate customer site

E.  

Providing secure layer 3 routing exchange between sites

Discussion 0
Questions 20

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

Options:

A.  

When sites of different VPRN customers use the same BGP AS number

B.  

When sites of the same VPRN customer use the same BGP AS number

C.  

When sites of different VPRN customers use different BGP AS numbers

D.  

When sites of the same VPRN customer use different BGP AS numbers

E.  

When the customer site AS number is the same as the provider AS number

Discussion 0
Questions 21

Which command is used to generate the output from an Nokia 7750 SR shown below?

Options:

A.  

Show service 3

B.  

Show service id 3

C.  

Show service 3 base

D.  

Show service id 3 base

E.  

Show service 3 detail

F.  

Show service id 3 detail

Discussion 0
Questions 22

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

Options:

A.  

When the route is first received at the P from the PE

B.  

When the route from the CE is populated into the VRF at the PE

C.  

When the route from the PE is populated into the VRF at the CE

D.  

When the route is propagated from the PE to the CE

E.  

When the route is exported into the MP-BGP table from the VRF

Discussion 0
Questions 23

Click the exhibit.

Which of the following best describes the output?

Options:

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.

Discussion 0
Questions 24

You are configuring spoke SDP termination of a VPLS service on a VPRN interface on an Nokia 7750 SR. The spoke SDP is running over a NULL encapsulated network port. The best practice is to set the VPRN interface p-mtu equal to what value over a NULL encapsulated network port.

Options:

A.  

The SDP path-MTU minus 14

B.  

The LMTU found in how router ldp bindings on the VPLS side of the spoke SDP

C.  

The configured service-mtu of the VPLS service

D.  

The LMTU found in how router ldp bindings on the VPLS side of the spoke SDP minus14

E.  

The SDP path-MTU

Discussion 0
Questions 25

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

Options:

A.  

Static

B.  

RIP

C.  

OSPF

D.  

IS-IS

E.  

MP-BGP

F.  

BGP

Discussion 0
Questions 26

Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured on an Nokia 7750 SR for a customer carrier offering VPRN services. Which of the following configuration steps is NOT required?

Options:

A.  

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

B.  

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

C.  

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

Discussion 0
Questions 27

Click the exhibit.

For the inter-AS model B VPRN, which of the following is TRUE when CE2 sends an IP packet to 192.168.1.1?

Options:

A.  

PE2 pushes one label on the IP packet and forwards it to ASBR2.

B.  

ASBR2 sends the IP packet with one label to ASBR1.

C.  

ASBR1 sends the IP packet with one label to PEL

D.  

PE1 pops one label off the IP packet and forwards it to CE1.

Discussion 0
Questions 28

Click the exhibit.

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

Options:

A.  

The system address of PE2 is present. The system addresses of CSC-PE1 and CSC-PE2 are not present.

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.

Discussion 0
Questions 29

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

Options:

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.

Discussion 0
Questions 30

Click the exhibit.

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

Options:

A.  

"Blue-Only"

B.  

"Blue-Only" and "Blue-Green"

C.  

"Green-Only"

D.  

"Extranet-VPN-Green"

E.  

"Blue-Green"

Discussion 0
Questions 31

Click the exhibit.

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

Options:

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 PEL

D.  

ASBR1 includes labels 131068 and 131069 in the route update sent to ASBR2.

Discussion 0
Questions 32

Click the exhibit.

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

Options:

A.  

CE1

B.  

PE2

C.  

PE1

D.  

CE2

Discussion 0
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