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Question 113

Refer to the exhibit. Which interface configuration must be configured on the HUB router to enable MVPN with mGRE mode?

    Correct Answer: C

    To configure the HUB router for MVPN with mGRE mode, the tunnel source should be the physical IP address of the WAN interface, not the tunnel IP address. Also, the `tunnel mode gre multipoint` command is essential for mGRE configuration. Thus, the correct configuration should include setting the tunnel source as a physical interface IP and using GRE multipoint mode. The option with `tunnel source 172.17.0.1` and `tunnel mode gre multipoint` fits these requirements.

Discussion
DaanB

Tunnel source IP can NOT be the IP address of the tunnel interface. The tunnel source IP should be, in this case, the IP address of the WAN interface.

wts

A - invalid tunnel ip-address. B - invalid tunnel source ip-address. C - multicast not enabled. D - invalid tunnel source ip-address. Apparently, everyone is choosing between the wrong ip-address and the missing multicast enable command.

TOKI07Option: C

C is correct. "ip nhrp map multicast dynamic" needs to be configured mainly when dynamic routing protocols using multicast is used.

gndrx78

What about "tunnel source 172.17.0.1"? Seems wrong.

gndrx78

My mistake, tunnel source must be public IP address so only A and C answers could be the right one. But C is the only answers with proper command "tunnel mode gre multipoint", so it is C

KoumeOption: C

Even is missing ip nhrp multicast dynamic. Seems the most correct as all command are valir for HUB

Pietjeplukgeluk

I agree, it C should have "ip nhrp map multicast dynamic" added to be fully correct. Anyway it seems better than B as that has the wrong source ip specified.

Carl1999Option: C

C is correct not B. ip address 10.0.0.1 255.255.255.0 ->tunnel ip address tunnel source 172.17.0.1 ->physical ip address

C_Tw21Option: C

C is correct. B is not correct as it uses the wrong tunnel-source. Should be the WAN-Interface , not the tunnel-ip itself. The "ip nhrp map multicast dynamic" is used on the spokes , and should point toi the hub.

BrandOption: A

A. interface Tunnel0 description mGRE - DMVPN Tunnel ip address 10.1.0.1 255.255.255.0 ip nhrp map multicast dynamic ip nhrp network-id 1 tunnel source 172.17.0.1 ip nhrp map 10.0.0.11 172.17.0.2 ip nhrp map 10.0.0.12 172.17.0.3 tunnel mode gre B. interface Tunnel0 description mGRE - DMVPN Tunnel ip address 10.0.0.1 255.255.255.0 ip nhrp map multicast dynamic ip nhrp network-id 1 tunnel source 10.0.0.1 tunnel mode gre multipoint C. interface Tunnel0 description mGRE - DMVPN Tunnel ip address 10.0.0.1 255.255.255.0 ip nhrp network-id 1 tunnel source 172.17.0.1 tunnel mode gre multipoint D. interface Tunnel0 description mGRE - DMVPN Tunnel ip address 10.0.0.1 255.255.255.0 ip nhrp map multicast dynamic ip nhrp network-id 1 tunnel source 10.0.0.1 tunnel destination 172.17.0.2 tunnel mode gre multipoint

forccnpOption: C

C is the correct answer

JOKERROption: C

C is correct.

[Removed]Option: C

Answer is C. The question specifies how to enable MGRE Mode. Now your tunnel source cannot be a tunnel IP. It can either be a physical interface or a physical interface IP

Raider1Option: B

B is answer. You need ip nhrp map multicast dynamic on the HUB

SeMo0o0o0Option: C

C is correct

ChiarettaOption: C

C is correct

ChillingAgainOption: C

C is correct

Hack4Option: C

C is correct

BudhOption: C

C is correct

tyh391Option: C

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