Failed run multiple-nodes between two nodes

[lytlwhl]

i have two nodes with one L20 card
running with
node1: python -m sglang.launch_server --model-path /data/code/models/70B --tp 2 --dist-init-addr 21.12.15.243:8010 --nnodes 2 --node-rank 0 --trust-remote-code --host 0.0.0.0 --port 8010

node2: python -m sglang.launch_server --model-path /data/code/models/70B --tp 2 --dist-init-addr 21.12.15.243:8010 --nnodes 2 --node-rank1 --trust-remote-code --host 0.0.0.0 --port 8010

it stuck at "Custom allreduce is disabled because this process group spans across nodes."

what's the problem