VMware Exam 2V0-41.23 Topic 14 Question 15 Discussion

Actual exam question for VMware's 2V0-41.23 exam

Question #: 15
Topic #: 14

An NSX administrator is using ping to check connectivity between VM1 running on ESXi1 to VM2 running on ESXi2. The ping tests fails. The administrator knows the maximum transmission unit size on the physical switch is 1600.

Which command does the administrator use to check the VMware kernel ports for tunnel end point communication?

Aesxcli network diag ping -I vmk0O -H <destination IP address>

Bvmkping ++netstack=geneve -d -s 1572 <destination IP address>

Cesxcli network diag ping -H <destination IP address>

Dvmkping ++netstack=vxlan -d -s 1572 <destination IP address>

Show Suggested Answer

Suggested Answer: B

The commandvmkping ++netstack=geneve -d -s 1572 <destination IP address>is used to check the VMware kernel ports for tunnel end point communication. This command uses the geneve netstack, which is the default netstack for NSX-T. The-doption sets the DF (Don't Fragment) bit in the IP header, which prevents the packet from being fragmented by intermediate routers. The-s 1572option sets the packet size to 1572 bytes, which is the maximum payload size for a geneve encapsulated packet with an MTU of 1600 bytes. The<destination IP address>is the IP address of the remote ESXi host or VM.References: : VMware NSX-T Data Center Installation Guide, page 19. : VMware Knowledge Base: Testing MTU with the vmkping command (1003728). : VMware NSX-T Data Center Administration Guide, page 102.

by Buddy at Apr 09, 2024, 02:56 PM

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Rosio

6 months ago

I would go with B as well, since the geneve netstack seems to be more commonly used in NSX environments.

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Alverta

6 months ago

I believe using vxlan netstack may also be a valid option for tunnel communications.

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Venita

6 months ago

I'm not sure about that, I think it might be D) vmkping ++netstack=vxlan -d -s 1572

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Marguerita

6 months ago

I agree, because the geneve netstack is commonly used for tunnel end point communication.

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Tanesha

7 months ago

I think the answer is B) vmkping ++netstack=geneve -d -s 1572

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Ressie

8 months ago

Haha, I'm just picturing the admin trying to ping with the vmk0O interface. That's a hilarious typo!

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Vincent

8 months ago

You know, I was thinking the same thing. VXLAN is more commonly used in NSX, so option D seems like the safer bet here.

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Oretha

8 months ago

I'm not so sure about that. Option D with the ++netstack=vxlan parameter might be a better choice, since VXLAN is a common tunneling protocol used in NSX. The -s 1572 parameter also seems appropriate for the 1600 MTU size.

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Davida

6 months ago

I think both options B and D could work, but I prefer option D for this scenario.

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Cheryl

6 months ago

I believe option D is the correct choice. Using VXLAN as the netstack aligns more with NSX.

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Shawnda

7 months ago

I agree with Howard. Option B seems to be more suitable in this case.

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Howard

7 months ago

I think option B might be better. It specifies the netstack as geneve, which is widely used in NSX.

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Weldon

8 months ago

Hmm, I'm leaning towards option B. The vmkping command with the ++netstack=geneve and -s 1572 parameters seems like it would be the right way to check the kernel ports for tunnel end point communication, given the MTU size on the switch.

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Lucina

8 months ago

Yeah, I agree. The key details here are the failed ping test and the MTU size on the physical switch. We need to use a command that can check the VMware kernel ports specifically for tunnel end point communication.

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Audry

8 months ago

This question seems pretty straightforward. We need to find the correct command to check the VMware kernel ports for tunnel end point communication when the ping test fails and the MTU size on the physical switch is 1600.

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