NCP-AII Question 38
Select 4You are configuring a routing table on an InfiniBand fabric with NVIDIA Spectrum-X™ switches to optimize the performance of an AI workload. The workload requires low-latency communication between compute nodes in different subnets. Which of the following steps should you perform to ensure proper routing and avoid connectivity issues?
- A
Define Linear Forwarding Tables (LFTs) on each switch to map destination Local Identifiers (LIDs) to output ports.
- B
Enable Adaptive Routing (AR) to dynamically adjust paths based on real-time network congestion.
- C
Configure static IP routes on each compute node for all possible destination subnets.
- D
Verify that Subnet Manager (SM) is running and operational across all switches in the fabric.
- E
Use NVIDIA UFM® (Unified Fabric Manager) to monitor and validate routing configurations across the fabric.
Show answer and explanation
Correct answers: A, B, D, E
Explanation
To configure routing tables on an InfiniBand fabric with NVIDIA Spectrum-X™, you need to define LFTs, enable Adaptive Routing for performance optimization, ensure the Subnet Manager is operational, and leverage tools like NVIDIA UFM® to monitor and validate configurations. Static IP routes on compute nodes are not relevant in this context, as routing is handled at the fabric level.
- A. Correct.
Defining Linear Forwarding Tables (LFTs) is essential for InfiniBand fabrics as it defines how packets are forwarded within the fabric. Without LFTs, routing will not function properly.
- B. Correct.
Enabling Adaptive Routing allows the network to dynamically adjust paths based on congestion, improving performance and avoiding bottlenecks.
- C. Incorrect.
Configuring static IP routes on compute nodes is unnecessary and inefficient in an InfiniBand fabric, as routing is managed at the network level by the Subnet Manager and switches.
- D. Correct.
The Subnet Manager is critical for discovering, configuring, and managing the InfiniBand fabric. If it is not operational, routing tables will not function.
- E. Correct.
NVIDIA UFM® provides tools to monitor, validate, and optimize routing configurations, making it an essential step in ensuring the fabric is properly configured and operational.