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Question 116

Refer to the exhibit.

An engineer must establish multipoint GRE tunnels between hub router R6 and branch routers R1, R2, and R3.

Which configuration accomplishes this task on R1?

    Correct Answer: C

    To establish multipoint GRE tunnels between hub router R6 and branch routers R1, R2, and R3, the configuration on R1 must include a network ID for the NHRP protocol, correct tunnel source interface, and appropriate NHRP mappings. Option C meets these requirements with the necessary commands: it sets the tunnel source interface to e0/0, specifies the GRE multipoint mode, includes the network ID, assigns the NHS address to 192.168.1.6, and correctly maps the IP addresses involved in the GRE tunnels.

Discussion
Carl1999Option: C

C is correct B doesn't have a network iD command.

VVdouble

B is not wrong because of the missing network ID command, but because it uses e0/1 as tunnel source on R1 and it should be e0/0

bk989

All DMVPN spoke/hub can have different network-id. network-id is locally significant. We set uo tunnels through mappings.

bk989

To clarify: The network-id's can be different. But they must be initiated to start the nhrp protocol.

palihaffOption: C

C is correct

BrandOption: C

A. interface Tunnel 1 ip address 192.168.1.1 255.255.255.0 tunnel source e0/0 tunnel mode gre multipoint ip nhrp nhs 192.168.1.6 ip nhrp map 192.168.1.6 192.1.10.1 ip nhrp map 192.168.1.2 192.1.20.2 ip nhrp map 192.168.1.3 192.1.30.3 B. interface Tunnel 1 ip address 192.168.1.1 255.255.255.0 tunnel source e0/1 tunnel mode gre multipoint ip nhrp nhs 192.168.1.6 ip nhrp map 192. 168.1.6 192.1.10.6 C. interface Tunnel 1 ip address 192.168.1.1 255.255.255.0 tunnel source e0/0 tunnel mode gre multipoint ip nhrp network-id 1 ip nhrp nhs 192.168.1.6 ip nhrp map 192.168.1.6 192.1.10.6 D. interface Tunnel 1 ip address 192.168.1.1 255. 255.255.0 tunnel source e0/1 tunnel mode gre multipoint ip nhrp network-id 1 ip nhrp nhs 192.168.1.6 ip nhrp map 192.168.1.6 192.1.10.1 ip nhrp map 192.168.1.2 192.1.20.2 ip nhrp map 192.168.1.3 192.1.30.3

SeMo0o0o0Option: C

C is correct