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CCIE Service Provider Written Exam (V 4.1)

Question No: 31

Refer to the exhibit. A network engineer from ISP 2 is designing the BGP architecture with a requirement of preventing their customer AS 65001 from becoming a transit AS, using the following configuration.

Router BGP 65000

Neighbor 10.0.0.1 remote-as 65001

Neighbor 10.0.0.1 route-map BGP-ROUTE-policy in

Which Cisco IOS command should be used within the route-map to achieve the goal on ISP 2 from AS 65000?

A.

route-map BGP-ROUTE-POLICY permit 10 set community no-advertise additive

B.

ip as-path access-lists 1 permit^65001$

!

route-map BGP-ROUTE-POLICY deny 10 match as-path 1

!

route-map BGP-ROUTE-POLICY permit 10

C.

ip as-path access-list 1 permit^65001$

!

route-map BGP-ROUTE-POLICY permit 10 match as-path 1

D.

route-map BGP-ROUTE-POLICY permit 10 set community no-export additive

Answer: C

Question No: 32

Which feature allows an MPLS TE tunnel to be used by an IGP at the headend of the tunnel ?

1. MPLS TE Forwarding Adjacency

2. Generalized MPLS

3. Different Services traffic Engineering

4. MPLS TE link management

5. MPLS TE autoroute announce

Answer: E

Question No: 33

A network engineer configures redistribution of OSPF intra-area routes into MP-BGP (super backbone) to preserve the continuity of the OSPF design in an MPLS Layer 3 VPN scenario From the CE perspective, what is the effect?

1. All intra-area routes are converted to external routes

2. All interarea routes are lost

3. All intra-area routes are converted to interarea routes

4. AU intra-area routes are lost

Answer: C

Question No: 34

Which protocol functions as the transfer protocol between the Cisco Open SDN Controller and forwarding devices?

1. OSPF or IS-IS

2. BGP-LS

3. OpenFlow

4. PCEP

Answer: C

Question No: 35

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

1. Disable ICMP redirects on an interface

2. Change from echo mode to asynchronous mode

3. Disable BFD altogether

4. Reduce the BFD packet rate

5. Reduce the BFD control plane packet rate

Answer: A

Question No: 36

Which Cisco IOS XR security component can protect the route processor of the Cisco CRS router?

1. Receive ACL

2. Interface ACL

3. Local Packet Transport Services

4. Control Plane Policing

Answer: C

Question No: 37 DRAG DROP

Drag and drop the 802.1ad characteristics on the left onto the port type on the right.

Not all

options are used

Answer:

Explanation: C-UNI

Access or trunk port

Support customer-tag vlan BPDU S-UNI

Access port only Filtering of BPDUs S-NNI

Trunk port only

Support S-Vlan BPDU, however only encapsulation default is supported

Question No: 38

Which two steps take place in the BGP Link State architecture ? (Choose two)

1. IGP is redistributed into BGP-LS

2. Advertise the BGP-LS NLRIs to the topology server

3. IGP uses BGP LS data from remote peers

4. Enable access to the Adj-RIB-In (BGP raw format )of a peer border router or provider edge router

5. BGP downloads the received BGP LS data to the IGP component on the router

Answer: B,C

Question No: 39

Which protocol in the IPv6 stack does the MLD protocol use to carry its messages?

1. NDP

2. IGMPv6

3. DHCPv6

4. IGMP

5. ICMPv6

Answer: E

Question No: 40

ISP A provides L2VPN services to Company B through an MPLS network. Company B uses all available CoS values to classify and different traffic forwarding within all Company B sites. ISP A uses the following CoS values to differentiate service classes for the VPN customer traffic

*MPLS EXP 0 for Bronze service class

*MPLS EXP 1 for Silver service class

*MPLS EXP 2 for Gold service class

*Remaining MPLS EXP values for ISP A internal use

ISP A’s policy is to forward VPN customer traffic based only on their Bronze, silver and Gold service classes. Which QoS method must ISP A implement to achieve this?

1. Short-pipe Mode

2. Russian Doll Model

3. Pipe Mode

4. Uniform Mode

5. Maximum Allocation Model

Answer: D

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