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Exam 3V0-42.20 All Questions

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Exam 3V0-42.20 topic 1 question 30 discussion

Actual exam question from VMware's 3V0-42.20
Question #: 30
Topic #: 1
[All 3V0-42.20 Questions]

A customer wants to use ECMP to provide additional throughput and availability for their critical business applications. Some applications require load balancing for scale and availability.
Which two Edge design choices can an architect present to the customer? (Choose two.)

  • A. Create a Tier-0 gateway in Active/Standby mode and a Tier-1 gateway in Active/Standby mode.
  • B. Configure ECMP and Load Balancing on the Tier-0 gateway.
  • C. Create a Tier-0 gateway in Active/Active mode and a Tier-1 gateway in Active/Standby mode.
  • D. Create a Tier-0 gateway in Active/Standby mode.
  • E. Configure ECMP on the Tier-0 gateway and Load Balancing on the Tier-1 gateway.
Show Suggested Answer Hide Answer
Suggested Answer: BD 🗳️
by RevanT at Feb. 2, 2021, 9:34 p.m.

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RevanT
Highly Voted 3 years, 9 months ago
Correct Answer: CE
upvoted 18 times
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MJ86
Highly Voted 3 years, 9 months ago
The correct answer is C & E. Let's break this down as follows: A is wrong because for ECMP to work, T0 needs to be configured in Active-Active. For the same reason, option D is also wrong. E is correct because load balancer can be configured only on Tier-1 gateway and ECMP can be only enabled on Tier-0. C is correct because it talks about Tier-0 in A-A. The only doubt I have here is Tier-1 inherits its state from Tier-0 it is connecting to. So if a Tier-0 is in A-A, how can be connecting Tier-1 be in A-S topology.
upvoted 9 times
tedybear
3 years ago
The T1 does not need to be connected to T0, it can be configured as one arm.
upvoted 1 times
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BrianOC
3 years, 6 months ago
For your last comment, check out this link: https://vxplanet.com/2019/07/27/nsx-t-tier0-ecmp-routing-explained/
upvoted 1 times
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AT45816
Most Recent 9 months, 4 weeks ago
Selected Answer: CE
Correct Answer: CE
upvoted 1 times
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Alchot
2 years, 2 months ago
C E correct Not B. T0 must be Active/Standby mod to run stateful services like load balancer Not D. T0 in Active/Standby mode will not provide the performance needed
upvoted 1 times
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airmouse1234
2 years, 7 months ago
Correct Answer: CE
upvoted 1 times
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diegof1
3 years, 7 months ago
Correct answer are C&E - ECMP routing is only available on Tier-0 gateways. (Take from NSX-T ICM 3.0 Lecture Manual - ECMP Routing Section) Also you can configure high availability on the gateways for redundancy. HA ca be configured in Active-Active or Active-Pasive. - Active-Active: * All the edge nodes are active and run the gateway services simultaneously. * The workload is distributed between all nodes to preven overloading one single node. (Take from NSX-T ICM 3.0 Lecture Manual - Configure High Availability Section) -Active-Stanby: * One edge node is active, and the other edge nodes reamin on stanby * The stanby nodes are used as backup nodes * One of the standby nodes take over when the active node becomes unavailable On the other hand, the Load Balancer must be attached to a Tier-1 Gateway. (Take from NSX-T ICM 3.0 Lecture Manual - Load Balancer Architecture - Section)
upvoted 5 times
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VMwareARCHI
3 years, 9 months ago
Correct Answer: CE
upvoted 5 times
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