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xc-llm-ascend/docs/source/tutorials/multi-node_dsv3.2.md
leo-pony ff91904ee2 [Doc] Clearer corresponding relationship between configurations for multi-node guides (#3441) 
Optimize multi-node guide: more clearer corresponding relationship
between configuration items and nodes

### What this PR does / why we need it?
Some issues caused by misunderstandings due to unclear guidance content,
for example: #3367

### Does this PR introduce _any_ user-facing change?
NA
### How was this patch tested?
NA

- vLLM version: v0.11.0rc3
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0

Signed-off-by: leo-pony <nengjunma@outlook.com>
2025-10-16 08:54:03 +08:00

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# Multi-Node (DeepSeek V3.2)
:::{note}
Only machines with aarch64 is supported currently, x86 is coming soon. This guide take A3 as the example.
:::
## Verify Multi-Node Communication Environment
### Physical Layer Requirements:
- The physical machines must be located on the same WLAN, with network connectivity.
- All NPUs are connected with optical modules, and the connection status must be normal.
### Verification Process:
Execute the following commands on each node in sequence. The results must all be `success` and the status must be `UP`:
:::::{tab-set}
::::{tab-item} A2 series
```bash
# Check the remote switch ports
for i in {0..7}; do hccn_tool -i $i -lldp -g | grep Ifname; done
# Get the link status of the Ethernet ports (UP or DOWN)
for i in {0..7}; do hccn_tool -i $i -link -g ; done
# Check the network health status
for i in {0..7}; do hccn_tool -i $i -net_health -g ; done
# View the network detected IP configuration
for i in {0..7}; do hccn_tool -i $i -netdetect -g ; done
# View gateway configuration
for i in {0..7}; do hccn_tool -i $i -gateway -g ; done
# View NPU network configuration
cat /etc/hccn.conf
```
::::
::::{tab-item} A3 series
```bash
# Check the remote switch ports
for i in {0..15}; do hccn_tool -i $i -lldp -g | grep Ifname; done
# Get the link status of the Ethernet ports (UP or DOWN)
for i in {0..15}; do hccn_tool -i $i -link -g ; done
# Check the network health status
for i in {0..15}; do hccn_tool -i $i -net_health -g ; done
# View the network detected IP configuration
for i in {0..15}; do hccn_tool -i $i -netdetect -g ; done
# View gateway configuration
for i in {0..15}; do hccn_tool -i $i -gateway -g ; done
# View NPU network configuration
cat /etc/hccn.conf
```
::::
:::::
### NPU Interconnect Verification:
#### 1. Get NPU IP Addresses
:::::{tab-set}
::::{tab-item} A2 series
```bash
for i in {0..7}; do hccn_tool -i $i -ip -g | grep ipaddr; done
```
::::
::::{tab-item} A3 series
```bash
for i in {0..15}; do hccn_tool -i $i -ip -g | grep ipaddr; done
```
::::
:::::
#### 2. Cross-Node PING Test
```bash
# Execute on the target node (replace with actual IP)
hccn_tool -i 0 -ping -g address 10.20.0.20
```
## Deploy DeepSeek-V3.2-Exp with vLLM-Ascend:
Currently, we provide a all-in-one image (include CANN 8.2RC1 + [SparseFlashAttention/LightningIndexer](https://gitcode.com/cann/cann-recipes-infer/tree/master/ops/ascendc) + [MLAPO](https://github.com/vllm-project/vllm-ascend/pull/3226)). You can also build your own image refer to [link](https://github.com/vllm-project/vllm-ascend/issues/3278).
- `DeepSeek-V3.2-Exp`: requreid 2 Atlas 800 A3(64G*16) nodes or 4 Atlas 800 A2(64G*8). [Model weight link](https://modelers.cn/models/Modelers_Park/DeepSeek-V3.2-Exp-BF16)
- `DeepSeek-V3.2-Exp-w8a8`: requreid 1 Atlas 800 A3(64G*16) node or 2 Atlas 800 A2(64G*8). [Model weight link](https://modelers.cn/models/Modelers_Park/DeepSeek-V3.2-Exp-w8a8)
Run the following command to start the container in each node(This guide suppose you have download the weight to /root/.cache already):
:::::{tab-set}
::::{tab-item} A2 series
```{code-block} bash
:substitutions:
# Update the vllm-ascend image
# export IMAGE=quay.io/ascend/vllm-ascend:v0.11.0rc0-deepseek-v3.2-exp
export IMAGE=quay.nju.edu.cn/ascend/vllm-ascend:v0.11.0rc0-deepseek-v3.2-exp
export NAME=vllm-ascend
# Run the container using the defined variables
# Note if you are running bridge network with docker, Please expose available ports
# for multiple nodes communication in advance
docker run --rm \
--name $NAME \
--net=host \
--device /dev/davinci0 \
--device /dev/davinci1 \
--device /dev/davinci2 \
--device /dev/davinci3 \
--device /dev/davinci4 \
--device /dev/davinci5 \
--device /dev/davinci6 \
--device /dev/davinci7 \
--device /dev/davinci_manager \
--device /dev/devmm_svm \
--device /dev/hisi_hdc \
-v /usr/local/dcmi:/usr/local/dcmi \
-v /usr/local/Ascend/driver/tools/hccn_tool:/usr/local/Ascend/driver/tools/hccn_tool \
-v /usr/local/bin/npu-smi:/usr/local/bin/npu-smi \
-v /usr/local/Ascend/driver/lib64/:/usr/local/Ascend/driver/lib64/ \
-v /usr/local/Ascend/driver/version.info:/usr/local/Ascend/driver/version.info \
-v /etc/ascend_install.info:/etc/ascend_install.info \
-v /root/.cache:/root/.cache \
-it $IMAGE bash
```
::::
::::{tab-item} A3 series
```{code-block} bash
:substitutions:
# Update the vllm-ascend image
# openEuler:
# export IMAGE=quay.io/ascend/vllm-ascend:v0.11.0rc0-a3-openeuler-deepseek-v3.2-exp
# Ubuntu:
# export IMAGE=quay.io/ascend/vllm-ascend:v0.11.0rc0-a3-deepseek-v3.2-exp
export IMAGE=quay.nju.edu.cn/ascend/vllm-ascend:v0.11.0rc0-a3-deepseek-v3.2-exp
export NAME=vllm-ascend
# Run the container using the defined variables
# Note if you are running bridge network with docker, Please expose available ports
# for multiple nodes communication in advance
docker run --rm \
--name $NAME \
--net=host \
--device /dev/davinci0 \
--device /dev/davinci1 \
--device /dev/davinci2 \
--device /dev/davinci3 \
--device /dev/davinci4 \
--device /dev/davinci5 \
--device /dev/davinci6 \
--device /dev/davinci7 \
--device /dev/davinci8 \
--device /dev/davinci9 \
--device /dev/davinci10 \
--device /dev/davinci11 \
--device /dev/davinci12 \
--device /dev/davinci13 \
--device /dev/davinci14 \
--device /dev/davinci15 \
--device /dev/davinci_manager \
--device /dev/devmm_svm \
--device /dev/hisi_hdc \
-v /usr/local/dcmi:/usr/local/dcmi \
-v /usr/local/Ascend/driver/tools/hccn_tool:/usr/local/Ascend/driver/tools/hccn_tool \
-v /usr/local/bin/npu-smi:/usr/local/bin/npu-smi \
-v /usr/local/Ascend/driver/lib64/:/usr/local/Ascend/driver/lib64/ \
-v /usr/local/Ascend/driver/version.info:/usr/local/Ascend/driver/version.info \
-v /etc/ascend_install.info:/etc/ascend_install.info \
-v /root/.cache:/root/.cache \
-it $IMAGE bash
```
::::
:::::
:::::{tab-set}
::::{tab-item} DeepSeek-V3.2-Exp A3 series
Run the following scripts on two nodes respectively
:::{note}
Before launch the inference server, ensure the following environment variables are set for multi node communication
:::
**node0**
```shell
#!/bin/sh
# this obtained through ifconfig
# nic_name is the network interface name corresponding to local_ip of the current node
nic_name="xxxx"
local_ip="xxxx"
export VLLM_USE_MODELSCOPE=True
export HCCL_IF_IP=$local_ip
export GLOO_SOCKET_IFNAME=$nic_name
export TP_SOCKET_IFNAME=$nic_name
export HCCL_SOCKET_IFNAME=$nic_name
export OMP_PROC_BIND=false
export OMP_NUM_THREADS=100
export HCCL_BUFFSIZE=1024
vllm serve /root/.cache/Modelers_Park/DeepSeek-V3.2-Exp \
--host 0.0.0.0 \
--port 8000 \
--data-parallel-size 2 \
--data-parallel-size-local 1 \
--data-parallel-address $local_ip \
--data-parallel-rpc-port 13389 \
--tensor-parallel-size 16 \
--seed 1024 \
--served-model-name deepseek_v3.2 \
--enable-expert-parallel \
--max-num-seqs 16 \
--max-model-len 17450 \
--max-num-batched-tokens 17450 \
--trust-remote-code \
--no-enable-prefix-caching \
--gpu-memory-utilization 0.9 \
--additional-config '{"ascend_scheduler_config":{"enabled":true},"torchair_graph_config":{"enabled":true,"graph_batch_sizes":[16]}}'
```
**node1**
```shell
#!/bin/sh
# this obtained through ifconfig
# nic_name is the network interface name corresponding to local_ip of the current node
nic_name="xxx"
local_ip="xxx"
# The value of node0_ip must be consistent with the value of local_ip set in node0 (master node)
node0_ip="xxxx"
export VLLM_USE_MODELSCOPE=True
export HCCL_IF_IP=$local_ip
export GLOO_SOCKET_IFNAME=$nic_name
export TP_SOCKET_IFNAME=$nic_name
export HCCL_SOCKET_IFNAME=$nic_name
export OMP_PROC_BIND=false
export OMP_NUM_THREADS=100
export HCCL_BUFFSIZE=1024
vllm serve /root/.cache/Modelers_Park/DeepSeek-V3.2-Exp \
--host 0.0.0.0 \
--port 8000 \
--headless \
--data-parallel-size 2 \
--data-parallel-size-local 1 \
--data-parallel-start-rank 1 \
--data-parallel-address $node0_ip \
--data-parallel-rpc-port 13389 \
--tensor-parallel-size 16 \
--seed 1024 \
--served-model-name deepseek_v3.2 \
--max-num-seqs 16 \
--max-model-len 17450 \
--max-num-batched-tokens 17450 \
--enable-expert-parallel \
--trust-remote-code \
--no-enable-prefix-caching \
--gpu-memory-utilization 0.92 \
--additional-config '{"ascend_scheduler_config":{"enabled":true},"torchair_graph_config":{"enabled":true,"graph_batch_sizes":[16]}}'
```
::::
::::{tab-item} DeepSeek-V3.2-Exp-W8A8 A3 series
```shell
#!/bin/sh
export VLLM_USE_MODELSCOPE=true
vllm serve vllm-ascend/DeepSeek-V3.2-Exp-W8A8 \
--host 0.0.0.0 \
--port 8000 \
--tensor-parallel-size 16 \
--seed 1024 \
--quantization ascend \
--served-model-name deepseek_v3.2 \
--max-num-seqs 16 \
--max-model-len 17450 \
--max-num-batched-tokens 17450 \
--enable-expert-parallel \
--trust-remote-code \
--no-enable-prefix-caching \
--gpu-memory-utilization 0.92 \
--additional-config '{"ascend_scheduler_config":{"enabled":true},"torchair_graph_config":{"enabled":true,"graph_batch_sizes":[16]}}'
```
::::
::::{tab-item} DeepSeek-V3.2-Exp-W8A8 A2 series
Run the following scripts on two nodes respectively
**node0**
```shell
#!/bin/sh
# this obtained through ifconfig
# nic_name is the network interface name corresponding to local_ip of the current node
nic_name="xxxx"
local_ip="xxxx"
export VLLM_USE_MODELSCOPE=True
export HCCL_IF_IP=$local_ip
export GLOO_SOCKET_IFNAME=$nic_name
export TP_SOCKET_IFNAME=$nic_name
export HCCL_SOCKET_IFNAME=$nic_name
export OMP_PROC_BIND=false
export OMP_NUM_THREADS=100
export HCCL_BUFFSIZE=1024
export HCCL_OP_EXPANSION_MODE="AIV"
export PYTORCH_NPU_ALLOC_CONF="expandable_segments:True"
vllm serve vllm-ascend/DeepSeek-V3.2-Exp-W8A8 \
--host 0.0.0.0 \
--port 8000 \
--data-parallel-size 2 \
--data-parallel-size-local 1 \
--data-parallel-address $local_ip \
--data-parallel-rpc-port 13389 \
--tensor-parallel-size 8 \
--seed 1024 \
--served-model-name deepseek_v3.2 \
--enable-expert-parallel \
--max-num-seqs 16 \
--max-model-len 17450 \
--max-num-batched-tokens 17450 \
--trust-remote-code \
--quantization ascend \
--no-enable-prefix-caching \
--gpu-memory-utilization 0.9 \
--additional-config '{"ascend_scheduler_config":{"enabled":true},"torchair_graph_config":{"enabled":true,"graph_batch_sizes":[16]}}'
```
**node1**
```shell
#!/bin/sh
# this obtained through ifconfig
# nic_name is the network interface name corresponding to local_ip of the current node
nic_name="xxx"
local_ip="xxx"
# The value of node0_ip must be consistent with the value of local_ip set in node0 (master node)
node0_ip="xxxx"
export VLLM_USE_MODELSCOPE=True
export HCCL_IF_IP=$local_ip
export GLOO_SOCKET_IFNAME=$nic_name
export TP_SOCKET_IFNAME=$nic_name
export HCCL_SOCKET_IFNAME=$nic_name
export OMP_PROC_BIND=false
export OMP_NUM_THREADS=100
export HCCL_BUFFSIZE=1024
export HCCL_OP_EXPANSION_MODE="AIV"
export PYTORCH_NPU_ALLOC_CONF="expandable_segments:True"
vllm serve vllm-ascend/DeepSeek-V3.2-Exp-W8A8 \
--host 0.0.0.0 \
--port 8000 \
--headless \
--data-parallel-size 2 \
--data-parallel-size-local 1 \
--data-parallel-start-rank 1 \
--data-parallel-address $node0_ip \
--data-parallel-rpc-port 13389 \
--tensor-parallel-size 8 \
--seed 1024 \
--served-model-name deepseek_v3.2 \
--max-num-seqs 16 \
--max-model-len 17450 \
--max-num-batched-tokens 17450 \
--enable-expert-parallel \
--trust-remote-code \
--quantization ascend \
--no-enable-prefix-caching \
--gpu-memory-utilization 0.92 \
--additional-config '{"ascend_scheduler_config":{"enabled":true},"torchair_graph_config":{"enabled":true,"graph_batch_sizes":[16]}}'
```
::::
:::::
Once your server is started, you can query the model with input prompts:
```shell
curl http://<node0_ip>:<port>/v1/completions \
-H "Content-Type: application/json" \
-d '{
"model": "deepseek_v3.2",
"prompt": "The future of AI is",
"max_tokens": 50,
"temperature": 0
}'
```
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