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2017-1-9 New Cisco 400-201: Cisco CCIE Service Provider Written Exam v4.1 Exam Questions Updated Today!

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A Corporate_ABC located in the US acquired Company_XYZ, which is located in Europe.
Both companies are connected to the internet using their local ISP.
A management VLAN must be built using subnet across the ABC and XYZ.
Which solution meets this requirement?

A.    VPLS
B.    AToM
C.    Layer 3 VPN
D.    L2TPv3

Answer: D

In a L2VPN service, customer CE1 sends frames to PE1 using a CoS marking value of 3.
However, the remote CE2 receives those frames from PE2 with a CoS marking value of 0.
Which description of this behavior is true?

A.    Egress PE2 is not configured with an outbound policy-map facing CE2 to preserve the customer CoS marking
B.    Egress PE2 is not configured with mpls ldp explicit-null command
C.    Ingress PE1 is remarking the CoS frame received from CE1 with value of 0.
D.    Egress PE2 is marking EXP 0 upon label imposition.

Answer: C

The service provider has the following VPLS requirements.
A PE must learn dynamically remote PEs that are members of the same VPLS domain.
The VPLS signaling must be in a point-to-multipoint fashion way according to RFC 4761 (Kompella).
Which feature must be enabled to meet these requirements?

A.    LDP signaling
B.    BGP signaling
C.    RSVP signaling
D.    RSVP auto discovery
E.    LDP auto discovery

Answer: B
RFC 4761
Virtual Private LAN Service (VPLS)
Using BGP for Auto-Discovery and Signaling

A layer 3 VPN customer opened a case that reports connectivity loss with remote sites.
An operations engineer realized this connectivity loss happened after the LDP label filtering was applied.
What is the root cause of this issue?

A.    Labels were not allocated for the P and PE physical interface.
B.    Labels were not allocated for the PE, P and RR physical interface
C.    Labels were not allocated for the CE loopback and physical interface
D.    Labels were not allocated for the P loopbacks
E.    Labels were not allocated for the PE, P and RR loopbacks.
F.    Labels were not allocated for the PE loopback

Answer: F

An operator enable BFD in echo mode and now CPU is high.
Which option is the most likely solution to the problem?

A.    Reduce the BFD control plane packet rate
B.    Change from echo mode to asynchronous mode
C.    Reduce the BFD packet rate
D.    Disable ICMP redirects on an interface
E.    Disable BFD altogether

Answer: D

Which technology enables operators to move the functionality of networking devices such as routers and firewalls away from proprietary hardware to servers and
off-the-shelf commercially available purpose-built hardware ?

A.    network Function Virtualization
B.    Openstack
C.    Operations support systems
D.    Software Defined Networ

Answer: A

An engineer is configuring an Embedded Packet Capture, Which two limitations must the engineer be aware of ?

A.    To limit the capture to desired traffic in EPC, control plane policing, access lists, and NBAR can be used
B.    EPC captures only multicast packets on ingress and does not capture the replicated packets on egress
C.    Existing EPC features can be supported on Cisco IOS and not on Cisco IOS-XR devices
D.    On Cisco IOS and Cisco IOS XE, the packet buffer is stored in DRAM and persists through reloads
E.    On Cisco IOS and Cisco IOS XE, the capture configuration is not stored in NVRAM and does not persist through reloads

Answer: CD

Which two sets of configuration implements CBTS?

A.    Create a master tunnel to which other tunnels can be members
B.    Create two bandwidth pools: a global pool and a sub pool
C.    Assign a policy-map defining a CBWFQ on an MPLS TE tunnel
D.    Create a PBR to use multiple MPLS TE tunnels according to the EXP value
E.    Create multiple MPLS TE tunnels from the same headend to the same tail-end

Answer: CE

An enterprise customer has recently purchased a WAN link from a service provider.
BGP is running over this WAN link.
An engineer notices that the CE router uses an large amount of system resources to process routing updates by filtering out unwanted routing updates received from the PE.
Which configuration can be applied to reduce the amount of processing required on the CE router that is not accepting full routes from PE?

A.    Enable BGP flowspec between CE and PE to negotiate which BGP prefixes to advertise
B.    Enable BGP prefix-based ORF capability between CE and PE to fitter out unwanted routing updates at the source
C.    On CE,place an inbound ACL on the interface-facing PE to filter all unwanted BGP prefixes
D.    On CE,apply an outbound route-map on BGP PE-neighbor to filter all the undesired BGP updates learned from the PE

Answer: B
BGP Prefix-Based Outbound Route Filtering – Cisco
When this capability is enabled, the BGP speaker can install the inbound prefix list filter to the remote peer as an outbound filter, which reduces unwanted routing updates.
The BGP Prefix-Based Outbound Route Filtering feature can be configured with send and/or receive ORF capabilities.

A router has this error in the syslog message:
%BGP-3-INVALID_MPLS:Invalid MPLS label (3) received in update for prefix 3246:1458: from
Which issue has it reported?

A.    The BGP label 3 can be used only in a BGP VPNV4 update if the RD is 0:0.
B.    The BGP label 3 can not be used as a label for a VPNV4 prefix
C.    The BGP label 3 can be used only in a BGP VPNV4 for a directly connected VPNV4 prefix of the sending PE router.
D.    The BGP label 3 can only be used in a BGP VPNV4 update for multicast address-family.

Answer: B

Which two restrictions of the Trunk EFP are true? (Choose two)

A.    Only one trunk EFP can be configured under one port or interface
B.    Features about encapsulations specification are not supported
C.    Features that require VLAN-specific values must be removed from the EFP trunk to form individual EFPs
D.    It supports only static EFPs that are user-configurable
E.    A bridge-domain number that is part of a trunk EFP configuration can be shared only by other EFP if under the same port or interface

Answer: AC

In order to validate update messages that contain the BGPsec_Path attribute, the recipient must have access to two pieces of data that are obtained from valid RPKI certificates and ROAs. Which are these two pieces of data? (Choose two)

A.    the OPEN BGP message that is successfully negotiated between BGP speakers to use the new BGP attribute, the BGPsec_Path
B.    the exchanged certificate with Internet Routing Registries using cryptographic identity management systems
C.    the public key infrastructure with the necessary certificate objects, the digitally signed routing objects, and the distributed repository system to hold
D.    the AS number, public key, and subject key identifier for each valid RPKI router certificate
E.    the AS number and the list of IP address prefixes for each valid ROA.

Answer: DE

In an Internet scenario with noncongruent unicast and multicast topologies, which protocol provides a scalable policy for performing multicast RPF checks?

B.    MSDP
C.    MBGP
D.    PGM

Answer: C


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