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LAB SIMULATION WAN CORE MGMT
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Question 141 - 300-410 discussion

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Refer to Exhibit.

A network administrator has successfully configured DMVPN topology between a hub and two spoke routers. Which two configuration commands should establish direct communications between spoke 1 and spoke 2 without going through the hub? (Choose two).

A.

At the hub router, configure the ip nhrp shortcut command.

Answers
A.

At the hub router, configure the ip nhrp shortcut command.

B.

At the spoke routers, configure the ip nhrp spoke-tunnel command.

Answers
B.

At the spoke routers, configure the ip nhrp spoke-tunnel command.

C.

At the hub router, configure ip nhrp redirect the command

Answers
C.

At the hub router, configure ip nhrp redirect the command

D.

At the spoke routers, configure the ip nhrp shortcut command.

Answers
D.

At the spoke routers, configure the ip nhrp shortcut command.

E.

At the hub router, configure tne Ip nhrp spoke-tunnel command

Answers
E.

At the hub router, configure tne Ip nhrp spoke-tunnel command

Suggested answer: C, D

Explanation:

To configure Spoke to Spoke communication we can configure DMVPN Phase II or Phase III. But in Phase II, the first few packets would go through Hub. In order tototally ignore the hub, we have to use DMVPN Phase III:

DMVPN Phase III is same as Phase 2 but removes some restrictions and complexities of Phase 2. Also allows greater variety of DMVPN network designs we use:+ ip nhrp redirect in hub: tells the initiator spoke to look for a better path to the destination spoke than through the Hub. Upon receiving the NHRP redirect message thespokes communicate with each other over the hub and they have their NHRP replies for the NHRP Resolution Requests that they sent out.+ ip nhrp shortcut in spokes: overwrite the CEF table on the spoke. It basically overrides the next-hop value for a remote spoke network from the default initial hubtunnel IP address to the NHRP resolved remote spoke tunnel IP address)

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asked 07/10/2024
Christian Galea
40 questions
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