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Implementing Cisco Service Provider Next-Generation Egde Network Services

Question No: 1

When implementing EoMPLS PWs, which configuration is optional?

1. matching PW ID on both ends

2. Xconnect

3. Cisco Express Forwarding

4. control word

Answer: D

Question No: 2

On PE7, how many multiprotocol IBGP routes are learned from PE8 and what is the next- hop IP address? (Choose two.)

1. 1

2. 2

3. 3

D. 10.8.1.1

E. 172.16.8.1

F. 192.168.108.81

Answer: B,E Explanation:

Show ip bgp vpnv4 all — i tag field is the answer

Question No: 3

Which method is used to provide inter-AS AToM services?

1. back-to-back VRF

2. targeted LDP

3. pseudowire stitching

4. AToM interworking

5. Cisco MPLS TE tunnels

6. autodiscovery

Answer: C Explanation:

http://www.cisco.com/en/US/docs/optical/cpt/r9_3/configuration/guide/cpt93_configuration_ chapter_0111.html

Question No: 4

When using H-VPLS, the PE router may use an IRB interface. How many VLAN tags can be processed by an IRB?

1. 0

2. 1

3. 2

4. 3

Answer: A

Question No: 5

A service provider wants to scale MAC address advertisements in its next generation E- LAN and E-TREE designs. Which technology can be used in the service provider cloud to reach this goal?

1. PBB EVPN

2. VPLS C. 802.1Q D. 802.3ad

Answer: A

Question No: 6

When implementing MPLS Layer 3 VPNs with customers running OSPF as the CE-PE routing protocol, which situation will require a sham link to be implemented in the MPLS backbone?

1. to connect customer sites in different OSPF areas

2. to connect customer sites in the same OSPF area

3. to prevent OSPF routing loops when a customer site has redundant CE-PE connections

4. if there is a backdoor link between the CE routers, to ensure that the backdoor link is used only to back up the primary connection through the MPLS VPN

Answer: D Explanation:

http://www.cisco.com/en/US/docs/ios/12_2t/12_2t8/feature/guide/ospfshmk.html

Question No: 7

Which option is a valid Cisco IOS XR BGP Layer 3 IPv4 MPLS VPN configuration?

1. router bgp 65001

   no bgp default ipv4-unicast bgp log-neighbor-changes

   neighbor 1.2.3.4 remote-as 65001 neighbor 1.2.3.4 update-source Loopback0 address-family vpnv4

   neighbor 1.2.3.4 activate

   neighbor 1.2.3.4 send-community extended exit-address-family

   address-family ipv4 vrf VPN redistribute ospf 100

2. router bgp 65001

   no bgp default ipv4-unicast bgp log-neighbor-changes

   neighbor 1.2.3.4 remote-as 65001 neighbor 1.2.3.4 update-source Loopback0 address-family vpnv4

   neighbor 1.2.3.4 activate exit-address-family

   address-family ipv4 vrf VPN redistribute ospf 100

3. router bgp 100

   address-family vpnv4 unicast neighbor 2.2.2.2

   remote-as 100

   update-source Loopback0 address-family vpnv4 unicast

   !

   vrf VPN_A

   rd 100:1

   address-family ipv4 unicast redistribute ospf 100

4. router bgp 100

address-family vpnv4 unicast neighbor 2.2.2.2

remote-as 100

update-source Loopback0 address-family ipv4 unicast

!

vrf VPN_A rd 100:1

address-family ipv4 unicast redistribute ospf 100

Answer: C

Question No: 8 DRAG DROP

Answer:

Question No: 9

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

1. bridge-group

2. bridge-domain

3. xconnect

4. vfi

5. encapsulation

Answer: A,B,D

Question No: 10

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.)

1. The RD is 1:1

2. The import and export RTs are 1:1

3. Interface GiO/0/0/0 is associated to the quot;defaultquot; VRF

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

5. The multiprotocol IBGP routes learned have a BGP origin code of quot;iquot;

Answer: B,C,E Explanation:

#show ip route show ip vrf

show ip vrf detail

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