Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) v1.0
Question 1
Refer to the exhibit. The OSPF neighbor relationship is not coming up.
What must be configured to restore OSPF neighbor adjacency?
- A. matching hello timers
- B. OSPF on the remote router
- C. use router ID
- D. matching mtu values
Answer : D
Question 2
An engineer configured two routers connected to two different service providers using BGP with default attributes. One of the links is presenting high delay, which causes slowness in the network.
Which BGP attribute must the engineer configure to avoid using the high-delay ISP link if the second ISP link is up?
- A. AS-PATH
- B. WEIGHT
- C. MED
- D. LOCAL_PREF
Answer : D
Question 3
Refer to the exhibit. A network administrator redistributed the default static route into OSPF toward all internal routers to reach to Internet.
Which set of commands restores reachability to the Internet by internal routers?
- A. router ospf 1 redistribute static subnets
- B. router ospf 1 network 0.0.0.0 0.0.0.0 area 0
- C. router ospf 1 redistribute connected 0.0.0.0
- D. router ospf 1 default-information originate
Answer : D
Question 4
Refer to the exhibit. The Math and Science departments connect through the corporate IT router, but users in the Math department must not be able to reach the
Science department and vice versa.
Which configuration accomplishes this task?
- A. vrf definition Science address-family ipv4 ! interface E 0/2 ip address 192.168.1.1 255.255.255.0 no shut ! interface E 0/3 ip address 192.168.2.1 255.255.255.0 no shut
- B. vrf definition Science address-family ipv4 ! interface E 0/2 vrf forwarding Science ip address 192.168.1.1 255.255.255.0 no shut ! interface E 0/3 vrf forwarding Science ip address 192.168.2.1 255.255.255.0 no shut
- C. vrf definition Science address-family ipv4 ! interface E 0/2 ip address 192.168.1.1 255.255.255.0 vrf forwarding Science no shut ! interface E 0/3 ip address 192.168.2.1 255.255.255.0 vrf forwarding Science no shut
- D. vrf definition Science ! interface E 0/2 ip address 192.168.1.1 255.255.255.0 no shut ! interface E 0/3 ip address 192.168.2.1 255.255.255.0 no shut
Answer : B
Question 5
Refer to the exhibit. The neighbor relationship is not coming up.
Which two configurations bring the adjacency up? (Choose two.)
- A. LA interface E 0/0 ip ospf authentication-key Cisco123
- B. NY interface E 0/0 no ip ospf message-digest-key 1 md5 Cisco123 ip ospf authentication-key Cisco123
- C. LA interface E 0/0 ip ospf message-digest-key 1 md5 Cisco123
- D. LA router ospf 1 area 0 authentication message-digest
- E. NY router ospf 1 area 0 authentication message-digest
Answer : CD
Question 6
Refer to the exhibit. The network administrator configured redistribution on an ASBR to reach to all WAN networks but failed.
Which action resolves the issue?
- A. The route map EIGRP->OSPF must have the 10.0.106.0/24 entry to exist in one of the three prefix lists to pass
- B. EIGRP must redistribute the 10.0.106.0/24 route instead of using the network statement
- C. The OSPF process must have a metric when redistributing prefixes from EIGRP
- D. The route map must have the keyword prefix-list to evaluate the prefix list entries
Answer : D
Question 7
Refer to the exhibit. An engineer configured R2 and R5 as route reflectors and noticed that not all routes are sent to R1 to advertise to the eBGP peers.
Which iBGP routers must be configured as route reflectors to advertise all routes to restore reachability across all networks?
- A. R1 and R4
- B. R1 and R5
- C. R4 and R5
- D. R2 and R5
Answer : C
Question 8
Refer to the exhibits. SanFrancisco and Boston routers are choosing slower links to reach each other despite the direct links being up.
Which configuration fixes the issue?
- A. All Routers router ospf 1 auto-cost reference-bandwidth 100
- B. SanFrancisco Router router ospf 1 auto-cost reference-bandwidth 1000
- C. Boston Router router ospf 1 auto-cost reference-bandwidth 1000
- D. All Routers router ospf 1 auto-cost reference-bandwidth 1000
Answer : D
Question 9
Refer to the exhibit. Troubleshoot and ensure that branch ׀’ only ever uses the MPLS ׀’ network to reach HQ.
Which action achieves this requirement?
- A. Introduce AS path prepending on the branch A MPLS ׀’ network connection so that any HQ advertisements from branch A toward the MPLS ׀’ network are prepended three times
- B. Modify the weight of all HQ prefixes received at branch ׀’ from the MPLS ׀’ network to be higher than the weights used on the MPLS A network
- C. Increase the local preference for all HQ prefixes received at branch ׀’ from the MPLS ׀’ network to be higher than the local preferences used on the MPLS A network
- D. Introduce an AS path filter on branch A routers so that only local prefixes are advertised into BGP
Answer : B
Question 10
Refer to the exhibit. The OSPF routing protocol is redistributed into the BGP routing protocol, but not all the OSPF routes are distributed into BGP.
Which action resolves the issue?
- A. Include the word external in the redistribute command
- B. Use a route-map command to redistribute OSPF external routes defined in an access list
- C. Include the word internal external in the redistribute command
- D. Use a route-map command to redistribute OSPF external routes defined in a prefix list
Answer : C
Question 11
Refer to the exhibit. Routing protocols are mutually redistributed on R3 and R1. Users report intermittent connectivity to services hosted on the 10.1.1.0/24 prefix.
Significant routing update changes are noticed on R3 when the show ip route profile command is run.
How must the services be stabilized?
- A. The routing loop must be fixed by reducing the admin distance of OSPF from 110 to 80 on R3
- B. The routing loop must be fixed by reducing the admin distance of iBGP from 200 to 100 on R3
- C. The issue with using BGP must be resolved by using another protocol and redistributing it into EIGRP on R3
- D. The issue with using iBGP must be fixed by running eBGP between R3 and R4
Answer : B
Question 12
When determining if a system is capable of support, what is the minimum time spacing required for a BFD control packet to receive once a control packet is arrived?
- A. Desired Min TX Interval
- B. Detect Mult
- C. Required Min RX Interval
- D. Required Min Echo RX Interval
Answer : C
Question 13
An engineer is configuring a network and needs packets to be forwarded to an interface for any destination address that is not in the routing table.
What should be configured to accomplish this task?
- A. set ip next-hop
- B. set ip default next-hop
- C. set ip next-hop recursive
- D. set ip next-hop verify-availability
Answer : B
Question 14
What is an advantage of using BFD?
- A. It detects local link failure at layer 1 and updates the routing table.
- B. It detects local link failure at layer 3 and updates the routing protocols.
- C. It has sub-second failure detection for layer 1 and layer 3 problems.
- D. It has sub-second failure detection for layer 1 and layer 2 problems.
Answer : D
Question 15
An engineer needs dynamic routing between two routers and is unable to establish OSPF adjacency. The output of the show ip ospf neighbor command shows that the neighbor state is EXSTART/EXCHANGE.
Which action should be taken to resolve this issue?
- A. match the passwords
- B. match the hello timers
- C. match the MTUs
- D. match the network types
Answer : C
Reference:
https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13684-12.html