NCP-AII Question 39
Select 4You are configuring an InfiniBand fabric with NVIDIA Spectrum-X™ switches for an AI training cluster. To ensure optimal routing for high-performance workloads, you need to define routing tables. Which of the following steps are required to correctly configure the routing tables in this environment?
- A
Define the correct LID (Local Identifier) assignments for all nodes in the fabric.
- B
Use Subnet Manager (SM) to calculate and verify the routing paths.
- C
Manually configure the routing tables on each switch to avoid Subnet Manager intervention.
- D
Enable Adaptive Routing (AR) on Spectrum-X™ switches to dynamically optimize paths.
- E
Ensure the routing algorithm supports multipathing and load balancing for AI workloads.
Show answer and explanation
Correct answers: A, B, D, E
Explanation
Proper configuration of routing tables on InfiniBand and NVIDIA Spectrum-X™ involves defining LIDs, relying on the Subnet Manager for path calculation, enabling Adaptive Routing for dynamic optimization, and ensuring the routing algorithm supports multipathing and load balancing. Manual configuration of routing tables is typically avoided because it can lead to errors and inefficiencies.
- A. Correct.
Defining correct LID assignments is essential for InfiniBand communication, as LIDs are used to route traffic between nodes.
- B. Correct.
The Subnet Manager is responsible for calculating and verifying routing paths in an InfiniBand fabric, ensuring proper connectivity.
- C. Incorrect.
Manually configuring routing tables on each switch is generally not recommended when using the Subnet Manager, as it can lead to conflicts and inefficiencies.
- D. Correct.
Enabling Adaptive Routing (AR) on Spectrum-X™ switches allows them to dynamically optimize paths based on congestion, which is critical for high-performance AI workloads.
- E. Correct.
Using a routing algorithm that supports multipathing and load balancing ensures that the workload is distributed efficiently across the fabric, reducing bottlenecks.