4A0-104 Alcatel-Lucent Services Architecture Questions and Answers

Option A

Option B

Option C

Option D

Spoke SDPs prevent loops in a VPLS.

Mesh SDPs and spoke SDPs can be used in the same VPLS.

A spoke SDP does not require the routers at both ends to be directly connected.

A mesh SDP is identical to a spoke SDP except for its flooding behavior.

Mirror slicing is used to logically separate a port that is being monitored.

Mirror slicing configuration is earned out in the mirror destination.

By default, mirror slicing is enabled so that only the protocol headers of data traffic are replicated to a mirror port.

The maximum number of mirror slices that can be made on a network and access port are 256 and 8, respectively

TRUE

FALSE

Epipe

Apipe

Fpipe

Ipipe

Cpipe

PE1 > config > router > bgp#info

--------------------------------------------

group "multi-bgp"

family vpn-ipv6

neighbor 10.10.10.2/32

local-address 10.10.10.1

peer-as 64496

exit

exit

PE1 > config > router > bgp#info

-------------------------------------------

group "multi-bgp"

family ipv6 vpn-ipv4

neighbor 10.10.10.2

local-address 10.10.10.1

peer-as 64496

exit

exit

PE1 > config > router > bgp#info

--------------------------------------------

group "multi-bgp"

family vpn-ipv6

neighbor 10.10.10 2

local-address 10.10.10.1

peer-as 64496

exit

exit

PE1 > config > router > bgp#info

--------------------------------------------

group "multi-bgp"

family ipv6 vpn-ipv6

neighbor 10.10.10.2/32

local-address 10.10.10.1

peer-as 64496

exit

exit

sap 1/1/1

sap 1/1/1:*

sap 1/1/1:*.0

sap 1/1/1:0*

sap 1/1/1:0

MP-BGP sessions need to be configured in the service provider network to support a VPN-IPv6 address family.

PE routers must be configured to run MP-BGP and IPv6

PE-to-CE BGP sessions need to be configured to support IPv6.

The provider core must be configured to support IPv6

None of the above statements are false.

All of the above statements are false

DLC Header

Control Word

Transport Label

Service Label

The matching outer tag is removed, and the frame is forwarded.

The inner tag is removed, and the frame is forwarded.

The inner tag is changed to match the SAP, and the frame is forwarded.

The frame is dropped.

1520

1540

1548

1556

The outer label allows traffic to transit across the MPLS network.

The inner label identifies the VPRN service.

MP-BGP is used to signal VPRN labels.

The VPRN service label contains the customer's IP address.

LDP

BGP

MP-BGP

MPLS

MP-BGP in the provider network needs to support the VPN-IPv6 address family.

PE routers must be configured to run MP-BGP.

PE-to-CE BGP sessions need to be configured to support IPv6.

The provider network core must be configured to support IPv6.

0

2

3

4

configure ies 5 customer 1000 create

configure router ies 5 customer 1000 create

configure service ies 5 customer 1000 create

configure router ies 5 customer 1000

The customer maintains complete control over routing.

The adding of new sites is simplified; no re-configuration is required at existing sites.

The clear demarcation of functionality between service provider and customer makes troubleshooting easier.

All of the above.

TRUE

FALSE

1586

1596

1600

1614

Mesh SDPs assist MAC learning by flooding traffic to other mesh SDPs.

A PE keeps a single FDB for all VPLSes it has.

Frames received on a SAP that are broadcast, multicast or unknown are flooded.

The FDB only stores the MAC addresses of remote sites.

A SAP can only be used by one service on a router.

A dedicated SDP needs to be created for each service.

A service is created on each site before the customer is created.

SAPs must be created before a service is created.

1514

1526

1548

1556

1536

A physical port.

ASAP.

Ingress MPLS frames with a specific label.

Entries that match an IP filter.

Entries that match a MAC filter.

All of the above can be used as a mirror source.

TRUE

FALSE

SDP ID

Service ID

Customer ID

SAP ID

The frame is dropped.

The service ID is added as the VLAN tag.

A VLAN tag of 0 is added as the provider VLAN tag

The frame is forwarded with no VLAN tag

TRUE

FALSE

distributed/virtual

local/sub

routed/Layer 3

distributed/routed

Layer 2/loopback

The mirror destination configuration on PE5 is missing the "remote-source" command,

The mirror destination on PE3 needs a "remote-source" command.

The mirror service IDs on the local and remote destinations must match.

The mirror source on PE3 needs a "remote-source" command.

The mirror source command on the remote PE3 needs a command that tells it to monitor port 1/1/2.

configure service sdp sdp-id gre create

configure service sdp sdp-id create

Idp

Isp Isp-name

A route target is a BGP extended community used to identify the VRF table for a prefix at the receiving PE

A route target is a mechanism from which VPRN controls the distribution of VPN routing information.

Route target attributes are earned in a MP-BGP as attributes of the route.

A route target is used by the PE router to identify the VRF that a VPN-lPv4 prefix is associated with.

All of the above statements describe a route target

None of the above statements describe a route target

TRUE

FALSE

sap 1/1/1

sap 1/1/1:5

sap 1/1/1:5:5

sap 1/1/1:10.100

To mirror service requirements of a customer with a single branch office and multiple remote sites

To utilize unused ports of a service router until they are required for a service.

To replicate traffic from a service port to another port for debugging or monitoring functions

To ease the configuration burden of services that support a large number of subscribers

All of the above

All services bound to the same SDP must be the same service type.

All services bound to the same SDP will have the same transport encapsulation.

Any operation on an SDP will affect all services bound to that SDP.

An SDP is used to direct traffic for a service from one router to another.

vprn-ping

sdp-ping

traceroute

Isp-trace

PE2 needs a mirror source with the remote source specified.

PE1 needs a mirror destination with the remote source specified.

PE1 needs a mirror source with the remote source specified.

PE1 and PE2 need a mirror source specified.

The default service MTU on a VPLS service is 1514 bytes.

The default IP MTU of an IES is set based on the network port MTU.

During VC label signaling, the VC MTU is verified and must match.

All of the above.

A VPLS service does not use a MAC FDB.

The router reads the destination MAC address of frames passing through the service.

The router reads the source MAC address of frames passing through the service.

The router uses reverse ARP (RARP) to resolve the MAC addresses for unknown destinations.

The router is programmed with MAC addresses by the network administrator.

sdp-ping

Isp-ping

svc-ping

sdp-mtu

4078

4986

5014

5022

configure service vpls 4 customer 4 vc-id 5 create

configure service vpls 5 customer 4 create

configure service vpls 100 customer 4 vc-id 4 create

configure service vpls vc-id 5 customer4 create

A-pipe

C-pipe

E-pipe

F-pipe

1

5

10

20

IP filter

MAC filter

Egress label

Ingress label

A mirror destination to indicate which ports to monitor.

A mirror source to indicate which ports to monitor.

A mirror destination to indicate on which sap or sdp traffic should be replicated.

A mirror source to indicate on which sap or sdp traffic should be replicated

A transport tunnel can carry many service tunnels.

The transport label is unchanged throughout the transport network.

A single network port can carry more than one transport tunnel.

Both MPLS and GRE transport tunnels use a service label.

config > service= epipe < service-id > enable

config > service~ vpws < service-id > enable

config > service= < service-id > no shutdown

config > port= < port-id > no shutdown

config > service= epipe < service-id > no shutdown

TRUE

FALSE

Route distinguishes are 12 bytes in length

Route distinguishes are appended to IPv4 prefixes to form 16 byte VPN-IFV1 prefixes.

Route distinguishes are used to determine which routes a VPRN should import.

CE routes must be configured with the proper route distinguishes for the VPRN they are associated to

All of the above statements are true.

All of the above statements are false.

Configuring an Epipe service with a customer ID

Defining a SAP or SAPs.

Binding to an SDP if it is a distributed service.

Enabling the service using the no shutdown command.

Creating and assigning an IP filter to the SAP.

Configuring QoS parameters

A VRF contains a single VPRN routes.

Every VRF in a PE is associated with one or more route target attributes.

Each VPRN needs a separate VRF in each PE router.

On the 7750 SR, by default, there is a unique one-to-one association between a VPN label and a VRF

All of the above statements are true.

All of the above statements are false.

TRUE

FALSE

Multiple MP-BGP sessions are required to carry VPN-IPv4 and VPN-IPv6 routes.

PE routers must support both IPv4 and IPv6 addresses; customer routers can use either one

In 6VPE, MP-BGP is used to advertise IPv6 prefixes and the associated VPRN label.

In 6VPE, the provider core routers are IPv6-unaware.

All of the above statements are true.

All of the above statements are false.

Path MTU is always calculated from the MTU of the egress network port on the head end PE.

oam sdp-mtu

adspec

cspf

The mirror destination configuration on PE5 is missing the "remote-source" command.

There needs to be a mirror source configuration on PE5 with the "remote-source" command.

This is not possible since the protocol analyzer is located at the Central Office. It needs to be at the customer site.

There needs to be a configuration command to put sap 1/1/3 on the mirror destination of PE5.

There needs to be a configuration command to put sap 1/1/3 on the mirror source of PE5

Configuring the physical port in access mode.

Configuring the physical port in network mode.

Enabling the port using the no shutdown command.

Ports are enabled by default, thus no need to use the no shutdown command.

TRUE

FALSE

A logical entity that provides a uniform, end-to-end configuration, management and billing model for provisioning either Internet or VPN connectivity.

Provides connectivity between customer access points.

A service that can either be local or distributed.

All of the above

Layer 3 direct Internet access service.

Layer 2 point-to-point service.

Layer 2 multipoint-to-multipoint service.

Layer 3 IP multipoint-to-multipoint VPN service.

dot1q

null

qinq

atm

ipcp

bcp-null

The service label is swapped for a transport label during transport.

The transport label is used to forward packets between PEs.

The service label is used to identify which VPRN a packet belongs to.

Labels are initially added at the ingress PE.

By default, the VC ID on the mesh SDPs of a VPLS are set to the service ID.

A VPLS appears to the customer as a direct Ethernet connection.

Mesh SDPs are used for VPLSes to avoid loops.

By default, T-LDP is used for signaling service labels.

The labels are of local significance only, so other routers can use the same value.

10.10.10.1 has yet to send its own unique label.

Router R4 is using the same tunnel to send and receive to 10.10.10.1.

The service on 10.10.10.1 is down, so it is rejecting packets.

Option A

Option B

Option C

Option D

mac-trace

svc-ping

Isp-trace

traceroute

By default, a VPLS signals an MTU based on the network port.

By default, an IES sets its ip-mtu to the VC MTU of the VPLS.

By default, an IES uses an MTU value based on its SAP.

By default, an IES uses an MTU based on the network port.

A mirror source with a defined source type.

A mirror source defined with an SDP destination.

A mirror destination with a SAP defined.

A mirror destination and a mirror source with the same service ID.

The CE must be an IGP peer of the IES.

The CE must be on the same subnet as the IES.

The CE must use an E-pipe to connect to the IES.

The CE must fragment any frames that are too large for the IES.

All routes in the VRF are advertised to the PEs and CEs.

No routes in the VRF are advertised to the PEs or to the CEs.

All routes in the VRF are advertised to the PEs, but not to the CEs.

All routes in the VRF are advertised to the CEs, but not to the PEs.

Service providers can apply QoS, ingress/egress traffic shaping and policing on a per service basis.

Different customers with overlapping address space can be accommodated.

There is a clear demarcation of customer and service provider networks.

Customers can connect to the same service using different subnets.

The VPN-IPv4 address family.

The IPv4 address family.

Either IPv4 or VPN-IPv4 address families can be configured.

The same address family must be used for the provider network and the PE-CE.

More than one SAP can be configured on a physical port that is configured for null encapsulation.

Dot1Q Ethernet encapsulated access ports can support multiple SAPs and services.

SAPs can be created on ports designated as "Network".

SAPs can only be created on Ethernet ports.

The FCS is verified and kept in the customer frame. The VLAN tag is kept and transported over the network.

The FCS is verified and kept in the customer frame. The VLAN tag is removed for transport over the network.

The FCS is verified and removed from the frame. The VLAN tag is kept for transport over the network.

The FCS is verified and removed from the frame. The VLAN tag is removed for transport over the network.

7958

7978

8022

8042

Customers must use the same routing protocol as the service provider.

Customers belonging to the same VPRN service must use the same subnet.

Service providers only need to perform configurations on the PEs to add additional VPRNs.

For each VPRN, only one customer can be connected at each PE.

It tests the IGP reachability of the far-end IP address of an SDP.

It tests that the MTU settings of a service are correct.

It tests in-band, uni-directional or round-trip connectivity of SDPs.

It tests the reachability of hosts connected to an SDP.

Only the mirror source must be re-configured.

Only the mirror destination must be re-configured.

Both the mirror destination and mirror source must be re-configured.

Neither the mirror destination nor the mirror source must be re-configured.

Both PE1 and PE2 need a mirror source.

PE2 needs a mirror source with the remote source specified.

PE1 needs a mirror source with the remote source specified.

Both PE1 and PE2 need a mirror destination.

PE2 needs a mirror destination that specifies a SAP.

The frame is dropped.

The VLAN tag is removed, and the frame is transported over the network.

The VLAN tag is kept, and the frame is transported over the network.

The VLAN tag is kept, a VLAN of 0 is added, and the frame is transported over the network.

LDP

BGP

MP-BGP

MPLS

The PE routers of the service are responsible for learning MAC addresses.

Flooding ensures that all PEs in a fully-meshed VPLS will learn the source address of all traffic.

MAC learning reduces flooding of frames with previously learned addresses.

Multiple VPLSes on the same PE share the same MAC FDB.

The service is a local service.

The service requires a second spoke SDP on this router.

The service's VC ID is 44.

The service will accept VLAN tag 100.