ExamGecko
Question list
Search
Search

List of questions

Search

Question 99 - D-PSC-MN-01 discussion

Report
Export

What accurately describes the InfiniBand cable support?

A.

Supports QSFP to QSFP cabling only

Answers
A.

Supports QSFP to QSFP cabling only

B.

Supports QSFP to QSFP cabling or QSFP to CX4 cabling

Answers
B.

Supports QSFP to QSFP cabling or QSFP to CX4 cabling

C.

Supports QSFP to CX4 cabling only

Answers
C.

Supports QSFP to CX4 cabling only

D.

Supports front-end customer external traffic

Answers
D.

Supports front-end customer external traffic

Suggested answer: A

Explanation:

In Dell EMC PowerScale systems that use InfiniBand for back-end networking, the cabling standards are specific to ensure optimal performance and compatibility.

InfiniBand Cable Support:

QSFP to QSFP Cabling Only:

QSFP (Quad Small Form-factor Pluggable):

A compact, hot-pluggable transceiver used for high-speed InfiniBand networking.

Standard for PowerScale:

PowerScale systems utilizing InfiniBand support QSFP to QSFP cables exclusively.

Ensures high-bandwidth, low-latency communication between nodes.

Why Option A is Correct:

Exclusive Support:

QSFP to QSFP is the only supported cabling method for InfiniBand in these systems.

Compatibility and Performance:

Using QSFP to QSFP cables guarantees compatibility with node interfaces and optimal network performance.

Why Other Options Are Incorrect:

Option B (QSFP to QSFP or QSFP to CX4):

QSFP to CX4 is not supported; CX4 is an older connector type not compatible with current PowerScale InfiniBand configurations.

Option C (QSFP to CX4 only):

Incorrect, as QSFP to CX4 cabling is not used in PowerScale systems for InfiniBand.

Option D (Supports front-end customer external traffic):

InfiniBand is used for internal back-end networking, not for front-end external customer traffic, which uses Ethernet connections.

Dell PowerScale

Reference:

Dell EMC PowerScale Networking Guide:

Back-End Network Cabling Section:

Specifies the use of QSFP to QSFP cables for InfiniBand connectivity.

Supported Cable Types:

Lists the approved cables and transceivers for InfiniBand networks.

Hardware Installation Guides:

Provide detailed instructions and diagrams for cabling using QSFP to QSFP connections.

Best Practices:

Use Certified Cables:

Always use Dell EMC-approved QSFP to QSFP cables to ensure reliability.

Proper Installation:

Follow the recommended procedures for connecting and securing InfiniBand cables.

Cable Management:

Organize cables to prevent strain and maintain proper airflow.

Additional Notes:

InfiniBand Usage:

Provides high-speed communication between nodes for data replication and cluster operations.

Transition to Ethernet:

Newer PowerScale models may use Ethernet back-end networking instead of InfiniBand.

asked 29/10/2024
Jeffrey Holt Jr
26 questions
User
Your answer:
0 comments
Sorted by

Leave a comment first