Exam NCM-MCI topic 1 question 12 discussion

Actual exam question from Nutanix's NCM-MCI

Question #: 12
Topic #: 1

An administrator is planning to deploy a Nutanix cluster to support a few high-performance VMs. This deployment will have the following considerations:
✑ Individual VMs will likely generate network throughputs in the range of 90-100Mbps
✑ Due to the configuration of the VMs, it is unlikely that a node will host more than one or two of them at a time
✑ Individual VMs will communicate with only a few (one or two) remote hosts at a time
✑ Multicast will not be used in the environment
✑ The hosts are connected via two 1GbE network connections
How should the administrator configure the network bonds to meet this requirement while maintaining the simplest switch configuration?

A. Configure bond0 as balance-sib
B. Configure bond0 as active-backup
C. Configure bond0 as balance-tcp
D. Configure bond0 as balance-lacp

Show Suggested Answer

Suggested Answer: A 🗳️

by double_nope at Sept. 29, 2021, 5:28 p.m.

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double_nope

Highly Voted 3 years ago

In the answers, balance-sib should be balance-slb.

upvoted 5 times

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Cromo19

Most Recent 11 months, 1 week ago

Selected Answer: A

Answer is A

upvoted 1 times

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pharoah2000

1 year, 6 months ago

Selected Answer: A

A: balance-slb is the best answer here both physical interfaces are in use balance-slb does not use LACP, switch configuration is simple. balance-slb do not support multicast B. only one physical interface is in use at any time C. It requires LACP to be configured on the switch, not the simplest configuration D. no such bond mode

upvoted 3 times

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Treasure

1 year, 7 months ago

Because： "Individual VMs will likely generate network throughputs in the range of 90-100Mbps" "Multicast will not be used in the environment" "simplest switch configuration" So the answer should be "balance-slb"。

upvoted 2 times

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Daner

1 year, 12 months ago

Answer must be B, Multicast is against the Nutanix Best Practices with balance SLB. Active-Backup configuration is enough for this Use Case

upvoted 3 times

Zippy12

9 months, 4 weeks ago

Multicast isn't an issue, as it's explicitly not being used per the description. Also, it gives a likely max of 2 VMs x 100MBps at a time. 200 MBps is 1600Mbps, which is more than 1GbE adapter can provide at a time. Active-Backup is definitely not sufficient for this, so everyone else saying balance-slb is correct.