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Cisco CCNP SP 642-889 Exam - Implementing Cisco Service Provider Next-Generation Edge Network Services (SPEDGE)

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Questions & Answers for Cisco 642-889

Showing 1-15 of 126 Questions

Question #1

What is an advantage of using the Cisco EVC infrastructure to implement carrier-class
Ethernet services that are not available on non-EVC-capable platforms?

A. PW redundancy

B. interworking support

C. PW stitching support

D. flexible frame-matching support and VLAN tag manipulation

E. local cross-connect support

Explanation:
http://www.cisco.com/web/YU/events/expo_08/pdfs/Carrier_Ethernet_Marek_Moskal.pdf

Question #2

Which two protocols can be used for VPLS signaling on a Cisco IOS XR router? (Choose
two.)

A. BGP

B. LDP

C. TDP

D. RSVP

E. PBB

Question #3

A routing entry on a PE router has an ext-hop address of ::ffff:[IP ADDRESS]. Which
service provider technology is being deployed?

A. 6VPE

B. 6PE

C. 4to6 tunnel

D. 6to4 tunnel

Question #4

The Cisco IOS XR address-family ipv4 labeled-unicast and the Cisco IOS/IOS XE neighbor
send-label commands are used in which MPLS implementation?

A. Cisco MPLS TE

B. CSC using MP-BGP for label exchange

C. back-to-back VRF

D. AToM

E. VPLS

Explanation:
http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/fscscleb.pdf
The MPLS VPNCarrier Supporting CarrierIPv4 BGP Label Distribution feature lets you
configure your carrier-supporting-carrier network to enable Border Gateway Protocol (BGP)
to transport routes and Multiprotocol Label Switching (MPLS) labels between the backbone
carrier provider edge (PE) routers and the customer carrier customer edge (CE) routers
using multiple paths. Previously, you had to use Label Distribution Protocol (LDP) to carry
the labels and an Internal Gateway Protocol (IGP) to carry the routes between PE and CE
routers to achieve the same goal.
The benefits of using BGP to distribute IPv4 routes and MPLS label routes are:
BGP takes the place of an IGP and LDP in a Virtual Private Network (VPN)
forwarding/routing instance (VRF) table. You can use BGP to distribute routes and MPLS
labels. Using a single protocol instead of two simplifies the configuration and
troubleshooting.
BGP is the preferred routing protocol for connecting two Internet service providers (ISPs),
mainly because of its routing policies and ability to scale. ISPs commonly use BGP
between two providers.
This feature enables those ISPs to use BGP.

Question #5

Which three security features can be implemented on PEs insidea Cisco IOS XR VPLS
environment? (Choose three.)

A. MAC flooding

B. neighbor VC storm-control

C. interface storm-control

D. MAC learning

E. DHCP snooping

F. MAC withdrawal

Question #6





On PE7, which three statements are correct regarding the MPLS VPN configurations used
to support the connectivity between the CE7 and CE8 sites? (Choose three.)

A. The RD is 1:1

B. The import and export RTs are 1:1

C. Interface GiO/0/0/0 is associated to the "default" VRF

D. The network that connects PE7to CE7 is redistributed into multiprotocol IBGP

E. The multiprotocol IBGP routes learned have a BGP origin code of "i"

Explanation:
#show ip route
show ip vrf
show ip vrf detail

Question #7

In which Cisco IOS XR configuration mode is the redistribute static command applied to
enable the redistribution of static VRF routes between the PE routers?

A. RP/0/RP0/CPU0:PE(config-router)#

B. RP/0/RP0/CPU0:PE(config-bgp)#

C. RP/0/RP0/CPU0:PE(config-bgp-vrf)#

D. RP/0/RP0/CPU0:PE(config-bgp-vrf-af)#

Explanation:
http://www.cisco.com/en/US/docs/routers/asr9000/software/routing/configuration/guide/rcas
r9kstat.html#wp1041359

Question #8

In hierarchical VPLS implementations, which two access architectures can be used
between the UPE and NPE? (Choose two.)

A. EoMPLS

B. MP-BGP

C. Frame Relay

D. 802.1ad

Explanation:
http://www.cisco.com/en/US/docs/switches/metro/me3600x_3800x/software/release/12.2_5
2_ey/configuration/guide/swmpls.html#wp1244272
H-VPLS uses spoke connections, usually between Layer 2 switches acting as the CE and
PE devices at the service provider's point-of presence (POP). The spoke connections can
be either an IEEE 802.1Q tagged connection or an MPLS LSP.

Question #9

Which protocol is used to hide customer VLANs inside the provider backbone network?

A. 802.1ap

B. 802.1x

C. 802.1ad

D. 802.1q

Question #10

Refer to the exhibit.

XR2 must be configured with a static route for 2.2.2.0/24 subnet toward CE2 into the VRF
ABC table. Which configuration achieves this goal?

A. router static vrf ABC 2.2.2.0/24 10.10.24.2

B. router static vrf ABC 2.2.2.0/24 10.10.24.2 address-family ipv4 unicast

C. router static vrf ABC address-family ipv4 unicast 2.2.2.0/24 10.10.24.2

D. router static address-family ipv4 unicast vrf ABC 2.2.2.0/24 10.10.24.2

Question #11

What is the primary difference between 6PE and 6VPE?

A. 6VPE does not require an MPLS core.

B. 6VPE requires an IPv6-aware core.

C. 6VPE provides IPv6 VPN services.

D. 6VPE tunnels IPv6 packets inside IPv4 packets.

Explanation:
6PE is for transporting ipv6 natively and 6VPE is for ipv6 mpls vpns

Question #12

When configuring VPLS on the Cisco ASR 9000, which three configurations are required
under the l2vpn configuration mode? (Choose three.)

A. bridge-group

B. bridge-domain

C. xconnect

D. vfi

E. encapsulation

Question #13

A customer requests Internet through its MPLS provider. Which Internet design model
guarantees maximum security and easier provisioning?

A. Internet access through global routing

B. Internet access through route leaking

C. Internet access through a separate VPN service

D. Internet access through multisite

Question #14

Which option represents an AToM pseudowire basic configuration in Cisco IOS XR device?

A. pseudowire-class name_class encapsulation mpls !

B. pseudowire-class name_class encapsulation l2tpv3 !

C. l2vpn pw-class name encapsulation mpls !

D. l2vpn xconnect group group-name p2p xconnect-name

E. neighbor ip-address pw-id pseudowire-id

Question #15

When implementing MPLS Layer 3 VPN services, which CE-PE routing method does not
require the use of the redistribute command to enable the customer routes to be advertised
through the MPLS cloud between the customer sites?

A. EIGRP

B. OSPF

C. IS-IS

D. BGP

E. static routing

F. OSPF or IS-IS

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