4A0-106 - Alcatel-Lucent Virtual Private Routed Networks Exam
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What operation does a P device perform when it receives a labeled packet for a VPRN service?
It swaps the outer label then forwards the packet.
What are the two main benefits of a hub and spoke VPRN design? (Choose two)
Reduced number of VPN tunnels that need to be managed
Centralized filtering policies with the introduction of a hub site
Which of the following is a characteristic of inter-AS model C VPRN?
A data packet destined to a remote AS is encapsulated with three labels within the originating AS.
Which of the following is not an available option for Route Distinguisher assignment?
One Route Distinguisher per VRF route
In inter-AS model C VPRN, which of the following about the command "advertise-label ipv4" is TRUE?
This command is required on the ASBRs to exchange labeled IPv4 routes between the ASs.
Which of the following about inter-AS model A VPRN is FALSE?
It is the most scalable of the Inter-AS models.
An SDP has been configured for a VPRN service using an existing MPLS LSP and the configuration shown below. Which of the statements below is true about the configuration on an Alcatel-Lucent 7750 SR?
The configuration is incomplete as the ignaling off command is missing
On an Alcatel-Lucent 7750 SR, which CLI command displays the Route Target(s) associated to a prefix?
Show router bgp routes vpn-ipv4 detail
When VPRN Outbound Route Filtering (ORF) is enabled, each PE sends its ORF list to its peer using which of the following BGP message types?
Which of the following is a benefit of a hub and spoke VPRN topology?
Reduced number of VPN tunnels that need to be managed.
Which of the following about BGP Site of Origin (SoO) is FALSE?
The SoO attribute can be used as matching criteria when redistributing routes from the CE to the PE.
Which of the following about the configuration of an inter-AS model C VPRN is FALSE?
The ASBRs must be configured with"enable-inter-as-vpn".
Which 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?
Show service id <service-id> base
Which of the following about inter-AS model AVPRN is TRUE?
It is not necessary to run MPLS at the boundary between autonomous systems.
Which of the following about inter-AS model C VPRN is FALSE?
It requires a route reflector to be configured in each AS for successful operation.
How are local CE routes associated with the appropriate VRF at the PE?
Based on the interface on which they are received.
Which of the following about a full mesh VPRN is FALSE?
The provider core maintains a full mesh of LSP tunnels and MP-BGP sessions between all P devices.
Which of the following about BGP loops in a VPRN environment is TRUE?
BGP loops are detected in a VPRN when the customer has separate sites using the same BGP autonomous system number.
Which of the following about Carrier Supporting Carrier (CSC) VPRN is FALSE?
CSC does not allow a customer carrier to offer Layer 2 services to its end customers.
In a VPRN that uses MPLS transport tunnels, which of the following is NOT configured on the PE device?
A label signaling protocol for defining transport tunnels between the PE and CE.
A CE hub and spoke VPRN has two spoke sites; which of the following would be the best option to implement this topology at the hub site PE?
One VPRN,one route distinguisher, and two route targets
Which statement about assigning one Route Distinguisher per VPN is TRUE?
This approach limits the opportunities for load balancing.
In a traditional layer 3 VPN which of the following will be an issue when there is overlapping address space between two customers? Choose the best answer.
The PE will not recognize the prefixes as being different
Which of the following best describes the goal of an Extranet VPRN?
Allow routes to be exchanged between all or selected sites of one VPRN and all or selected sites of a second VPRN
Which of the following about inter-AS model B VPRN is FALSE?
One single ASBR is required in each AS to hold the routes for all VPRNs.
In a Carrier Supporting Carrier (CSC) VPRN, which of the following is a benefit to the customer carrier?
The ability to offer Internet connectivity and a variety of services over a single CSC VPRN interface.
What is the purpose of the Route Distinguisher?
It is used to make IPv4 addresses unique
Which of the following is NOT a viable option when implementing inter-AS VPRN?
MP-eBGP exchange of labeled IPv4 routes between route reflectors residing in different autonomous systems.
Which of the following about scaling techniques for route reflectors is FALSE?
Filtering at route reflectors allows the route reflector to filter routes received from PEs and only accept routes with a certain route distinguisher.
Which of the following VPRN topologies must a customer implement to allow a given VRF to include routes from different VPRNs?
An extranet VPRN
What are the two primary problems the service provider must consider when providing traditional Layer 3 VPN services using only a single common routing table in the provider core? (Choose two)
Route leaking between the customer networks
Unwanted packet forwarding between customer networks
VPN-IPv4 addressing is made unique by defining an address structure consisting of:
A 64-bit Route Distinguisher followed by a 32-bit IPv4 address.
Choose the best answer to describe the result of the configuration of an Alcatel-Lucent 7750 SR shown below?
The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 4 routes are received and disable learning of new routes at 41
Which of the following protocols are supported by the Alcatel-Lucent 7750 SR for the creation of transport tunnels within an autonomous system?
For Carrier Supporting Carrier (CSC) VPRN, which of the following is NOT applicable to both types of customer carriers: BGP/MPLS service providers and Internet service providers?
MP-iBGP is used to advertise end-customer and Internet routes directly between the PE routers.
What is wrong with the configuration shown below?
There is nothing wrong with this configuration
Which of the following about the maximum number of routes that can be accepted in a VRF for a VPRN service on the Alcatel-Lucent 7750 SR is FALSE?
Once the "threshold" value is reached, no new routes are added to the VRF.
Which of the following about inter-AS model C VPRNs is FALSE?
ASBRs exchange the system addresses of PE routers as VPN-IPv4 routes over MP-eBGP.
Why would a selective export policy be applied to a customer VPRN service? (Choose three)
To limit the number of routes advertised from a customer site
To limit connectivity to selected customer networks
For the data packets in a VPRN, how is the inner label in an MPLS packet signaled?
Signaled via MP-BGP and used to identify the customer VPRN.
Which of the following about VPRN Outbound Route Filtering (ORF) is FALSE?
BGP ORF allows a receiving PE to filter out unnecessary inbound routes.
At what point does the Route Target become associated with a route?
When the route is exported into the MP-BGP table from the VRF
What is the minimum number of Route Distinguishers required to implement an overlapping VPRN involving 5 different customers?
Which of the following about inter-AS model B VPRN is TRUE?
The ASBRs use MP-iBGP to peer with PE routers in their autonomous system and exchange VPN- IPv4 routes.
Which of the following about eiBGP Load Balancing is FALSE?
Is enabled in the config>router>bgp context
In a Carrier Supporting Carrier (CSC) VPRN, which of the following is a benefit to the network provider?
The solution scales as the number of VPNs offered by the customer carriers increases.
You are configuring spoke SDP termination of a VPLS service on a VPRN interface on an AlcatelLucent 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.
The LMTU found in how router ldp bindings on the VPLS side of the spoke SDP
What are the main functions of a Layer 3 VPN? (Choose three).
Distributing customer routing information between sites
Forwarding customer data packets
Maintaining separation between distinct customer networks
Based 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?
The route with the lowest Origin.
A service provider core consists of 6 PE and 4 P routers. Assuming route reflection is not used, how many internal BGP sessions are required in the service provider network for a correct operation of VPRN services?