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Topic 2, Exam Pool B
Refer to the exhibit.
BGP and EIGRP are mutually redistributed on R3, and EIGRP and OSPF are mutually redistributed on R1. Users report packet loss and interruption of service to applications hosted on the 10.1.1.0724 prefix. An engineer tested the link from R3 to R4 with no packet loss present but has noticed frequent routing changes on R3 when running the debug ip
route command. Which action stabilizes the service?
A.
Tag the 10.1.1.0/24 prefix and deny the prefix from being redistributed into OSPF on R1.
B.
Repeat the test from R4 using ICMP ping on the local 10.1.1.0/24 prefix, and fix any Layer 2 errors on the host or switch side of the subnet. ^ C. Place an OSPF distribute-list outbound on R3 to block the 10.1.10/24 prefix from being advertised back to R3.
C.
Reduce frequent OSPF SPF calculations on R3 that cause a high CPU and packet loss on traffic traversing R3.
Tag the 10.1.1.0/24 prefix and deny the prefix from being redistributed into OSPF on R1.
An engineer sets up a DMVPN connection to connect branch 1 and branch 2 to HQ branch 1 and branch 2 cannot communicate with each other. Which change must be made to resolve this issue?
A.
Option A
B.
Option B
C.
Option C
D.
Option D
Option D
Refer to the exhibit.
Which action resolves the adjacency issue?
A.
Match the hello interval timers.
B.
Configure the same EIGRP process IDs.
C.
Match the authentication keys.
D.
Configure the same autonomous system numbers.
Configure the same autonomous system numbers.
Explanation:
EIGRP does not have process ID as it uses Autonomous System (AS) numbers only. This is not an authentication problem or we would see this error from the debug:
EIGRP: Ethernet0/0: ignored packet from 10.1.1.3, opcode = 1 (missing authentication or key-chain missing)
If the AS numbers between two routers are different then the neighbor relationship cannot be formed.
Refer to the exhibits.
When DMVPN is configured, which configuration allows spoke-to-spoke communication using loopback as a tunnel source?
A.
Configure crypto isakmp key cisco address 0.0.0.0 on the hub.
B.
Configure crypto isakmp key Cisco address 200.1.0.0 255.255.0.0 on the hub.
C.
Configure crypto isakmp key cisco address 200.1.0.0 255.255.0.0 on the spokes.
D.
Configure crypto isakmp key cisco address 0.0.0.0 on the spokes.
Configure crypto isakmp key cisco address 0.0.0.0 on the spokes.
A DMVPN single hub topology is using IPsec + mGRE with OSPF. What should be configured on the hub to ensure it will be the designated router?
A.
tunnel interface of the hub with ip nhrp ospf dr
B.
OSPF priority to 0
C.
route map to set the metrics of learned routes to 110
D.
OSPF priority greater than 1
OSPF priority greater than 1
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