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Q1. Which CE-to-PE routing protocol implements the down bit as a loop prevention mechanism?
A. RIPv2
B. EIGRP
C. IS-IS
D. OSPF
E. BGP
Answer: D
Q2. In PE7, what is the pseudowire ID that connects to the 10.8.1.1 neighbor?
A. 70
B. 80
C. 123
D. 0x840001
E. 0x4000080
Answer: C
Q3. 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
Answer: D
Q4. What happens if the destination MAC address is not present in the table for the packets that are received on one of the ACs in VPLS?
A. Packets are switched only to the PW.
B. Packets are flooded only to the other local ACs.
C. Packets are flooded on all other ACs and on all PWs that are associated with the bridge domain.
D. Packets are dropped.
Answer: C
Q5. RAG DROP
Answer:
Q6. Which option is used as a loop prevention mechanism to support MPLS VPN customers with multihomed sites?
A. BGP down bit
B. sham links
C. AS override
D. SOO extended BGP community
E. allowas-in
Answer: D
Q7. Refer to the partial Cisco IOS XR PE router VRF configuration exhibit.
To implement a central-service VPN supporting both customer1 and customer2, what will be the required corresponding VRF configuration on the central-service-server PE router?
A. vrf central-service-server
address-family ipv4 unicast
import route-target
3:1
2:2
export route-target
3:1
2:1
!
B. vrf central-service-server
address-family ipv4 unicast
import route-target
3:1
2:1
export route-target
3:1
2:2
!
C. vrf central-service-server
address-family ipv4 unicast
import route-target
3:1
1:1
1:2
export route-target
3:1
1:1
1:2
!
D. vrf central-service-server
address-family ipv4 unicast
import route-target
3:1
1:1
1:2
2:1
2:2
export route-target
3:1
1:1
1:2
2:1
2:2
!
Answer: A
Q8. In Layer 3 MPLS VPN implementations, if some of the VPNv4 routes on one PE router do not appear on another PE router, what could be the problem?
A. RD mismatch between the PE routers
B. RT export and import configuration errors
C. RD export and import configuration errors
D. VRF name mismatch between the PE routers
Answer: B
Q9. Which MP-BGP address family must be configured to use VPLS autodiscovery in a Cisco IOS XR router?
A. address-family l2vpn vpls-vpws
B. address-family vpnv4 unicast
C. address-family ipv4 mdt
D. address-family ipv4 tunnel
E. address-family vpls vfi
Answer: A
Q10. Implementing H-VPLS instead of VPLS reduces which requirement?
A. having a full mesh of PWs between all the PE routers in the service provider MPLS core
B. having a full mesh of PWs between all the UPE routers
C. having to implement QinQ tagging between the UPE and the NPE
D. having to implement MPLS LDP between the UPE and the NPE
E. the overhead of using BGP or LDP autodiscovery
Answer: A