inference/research
verifiedhigh · 0.85updated 2026-10-03

vLLM issue 59185: B200 cross-node TP=4 startup hangs without MNNVL during communicator initialization

repo

Fields

id
sources/mgpu-vllm-59185-b200-cross-node-hang
URL
https://github.com/vllm-project/vllm/issues/59185
Publisher
vllm-project/vllm
Kind
repo
Published
2026-09-29
Accessed
2026-10-03
notes
Two B200 nodes with two GPUs exposed each, TP=4 over Ray, intra-node NVLink but no multi-node NVLink fabric; hangs in communicator init.

Notes

Two B200 nodes with two GPUs exposed each, TP=4 over Ray, intra-node NVLink but no multi-node NVLink fabric; hangs in communicator init.

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