400-201 Guide

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Q21. In Multicast Inter-AS VPN context, which BGP attribute should you use to overcome the Option B limitation due to a rewritten originator next-hop address in the network? 

A. connector 

B. AS path 

C. weight 

D. originator 

Answer:


Q22. Refer to the exhibit. Two MPLS TE tunnels are configured with a total bandwidth guarantee of 100 Mbps. However, Tunnel 1 has a requirement to have one-fifth of this total bandwidth. Which two configurations accomplish this goal? (Choose two.) 

A. Configure tunnel mpls traffic-eng bandwidth 20000 under the Tunnel 1 interface. 

B. Configure bandwidth 20000 under the Tunnel 1 interface. 

C. Configure tunnel mpls traffic-eng bandwidth 80000 under the Tunnel 2 interface. 

D. Configure bandwidth 80 Mbps under physical interfaces in the path PE1-P2-PE2. 

E. Configure bandwidth 20 Mbps under physical interfaces in the path PE1-P1-PE2 

F. Configure bandwidth 80000 under the Tunnel 2 interface. 

Answer: A,C 

Explanation: See Configuration Guide 


Q23. An engineer is troubleshooting Precision Time Protocol on Cisco ASR 9000 router and noticed the protocol is running in a Multicast mode. Which two results regarding the messages can the engineer expect? (Choose two) 

A. IPTP messages that use unicast messages and those that use multicast messages must be specified. 

B. Announce and Sync messages are sent as multicast messages. 

C. Signaling. Delay-Request and Delay-Response messages are sent as multicast messages 

D. All messages for PTP will be sent as multicast messages 

E. Announce and Sync messages are sent as unicast messages 

F. Signaling, Delay-Request, and Delay-Response messages are sent as unicast messages 

Answer: B,F 


Q24. DRAG DROP 

Drag and drop the subslot of the SIP-800 card that is used on Cisco CRS routers on the left to the correct PUM ASIC process on the right. 

Answer: 


Q25. Refer to the exhibit. 

The prefix 10.1.1.64/28 should be advertised to the PE router, yet the prefix is not being received by the PE. Which configuration should be applied on CE in order to fix this issue? 

A. jp prefix-list ROUTES_TO_SP seq 1 permit 10.1.1.64/28 

B. router bgp 65000 no network 10.1.1.64 mask 255.255.255.240 network 10.1.1.128 mask 255.255.255.128 

C. ip prefix-list ROUTES_TO_SP permit 10.1.1.64/28 

D. router bgp 65000 no network 10.1.1.64 mask 255.255.255.240 network 10.1.1.0 mask 255.255.255.0 

Answer:


Q26. Which are the four key design requirements for mobile IP backhaul? (Choose four) 

A. network timing distribution and recovery 

B. MPLS-enabled interface 

C. Layer 2 Tunneling 

D. X2 interface turning point 

E. DiffServ QoS 

F. bandwidth 

G. native IPv6 support 

H. mandatory Layer 3 access up to a cell site 

Answer: A,B,E,H 


Q27. Refer to the exhibit. 

In the topology, networks in VRF A use the service provider network for transport. PE1 and PE2 run MP-BGP VPNv4 peering. Links between PE and P routers have MPLS enabled. Links between R1 and P routers do not support MPLS. 

Which technology can be implemented to build MPLS services between P1 and P2? 

A. Layer 3 VPN over GRE Tunnels 

B. L2TPv3 

C. RSVP Signaled Tunneling 

D. MPLS LDP Tunnels 

E. MPLS TE 

Answer:


Q28. Refer to the exhibit. 

An engineer observes that the MC-LAG bundle is down on the active aggregation device. Which is the reason for this issue? 

A. The number of configured minimum links is the same of the maximum links available in the bundle. 

B. The ICCP redundancy group is configured with the same system MAC address 

C. The ICCP redundancy group is configured with the system priority. 

D. The number of minimum configured links is greater than the number of links operational in the bundle 

Answer:

Explanation: 

https://supportforums.cisco.com/document/9868751/asr9000xr-multichassis-lag-or-mc-lag-mclag-guide130 


Q29. In an MPLS VPN environment, the QoS marking over the MPLS backbone must be different from the one that is received from the customer. The forwarding on the egress PE is based on the marking that is set by the ingress PE. Which null label and QoS mode can achieve this? 

A. MPLS explicit null with pipe mode 

B. MPLS implicit null with short pipe mode 

C. MPLS implicit null with uniform mode 

D. MPLS explicit null with uniform mode 

E. MPLS explicit null with short pipe mode 

F. MPLS implicit null with pipe mode 

Answer:

Explanation: 

http://www.cisco.com/en/US/tech/tk828/technologies_q_and_a_item09186a00800a43f5.sht ml#wp27379 

http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_te_diffserv/configuration/15-mt/mp-te-diffserv-15-mt-book/mp-diffserv-tun-mode.pdf 

https://ccdewiki.wordpress.com/2013/05/31/three-qos-models-in-mpls/ 


Q30. A network engineer is designing the BGP architecture with a requirement of preventing the AS 65001 from becoming a Transit AS path, using the following configuration: 

router bgp 65000 

neighbor 10.0.0.1 route-map BGP-ROUTE-POLICY in 

The goal is to prevent routes learned from 10.0.0.1 from being advertised to any other eBGP peering in the AS 65000. What command should be used within the route map to achieve this goal while keeping existing route policies in place? 

A. set community no-export additive 

B. set community no-advertise 

C. set community no-advertise additive 

D. set community no-export 

Answer:

Explanation: 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/26634-bgp-toc.html 


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