增加pd分离单实例跨机第二个ip通过配置文件获取。配置文件上设置如下：

# 第一个ip为D的第一个节点，第二个ip为D的第二个节点,配置:export IP_CONFIG_FILE=/data/xiabo/w4a8_1/ip_config.txt
192.168.1.1 192.168.1.100
192.168.1.2 192.168.1.101
192.168.1.3 192.168.1.102
10.16.1.75 10.16.1.76

vllm/distributed/kv_transfer/kv_connector/v1/p2p/p2p_nccl_connector.py

@@ -6,7 +6,7 @@ from typing import TYPE_CHECKING, Any, Optional
 
 import regex as re
 import torch
-
+import os
 from vllm import envs
 from vllm.config import VllmConfig
 from vllm.distributed.kv_transfer.kv_connector.v1.base import (
@@ -103,6 +103,36 @@ class P2pNcclConnector(KVConnectorBase_V1):
         self.total_num_hidden_layers = getattr(self.model_config.hf_text_config,
                                               "num_hidden_layers", 0)
         self.pp_size = self.parallel_config.pipeline_parallel_size
+        self.tp_size = self.parallel_config.tensor_parallel_size
+        self.num_card = self.pp_size * self.tp_size
+        self.multiple_machines = 1 if self.num_card > 8 else 0
+
+        if self.is_producer and self.multiple_machines == 1:
+            self.ip_map = {}
+            self.duplicate_keys = []
+            config_file = os.getenv('IP_CONFIG_FILE')
+            if not config_file:
+                print("Warning: Please set the IPVNet FILE environment variable for cross machine recognition of the second IP address")
+                return
+            try:
+                with open(config_file, 'r', encoding='utf-8') as file:
+                    for line_num, line in enumerate(file, 1):
+                        line = line.strip()
+                        if line and not line.startswith('#'):
+                            ips = line.split()
+                            if len(ips) == 2:
+                                first_ip, second_ip = ips
+                                if first_ip not in self.ip_map:
+                                    self.ip_map[first_ip] = second_ip
+                            else:
+                                print(f"warning: num {line_num} Incorrect format : {line}")
+            except Exception as e:
+                print(f"Error: Exception occurred while reading configuration file - {e}")
+
+
+    def get_ip_value(self, key):
+        return self.ip_map.get(key)
+        
 
     # ==============================
     # Worker-side methods
@@ -387,6 +417,23 @@ class P2pNcclConnector(KVConnectorBase_V1):
 
                 pp_rank = (self.parallel_config.rank // self.parallel_config.tensor_parallel_size
                     ) % self.parallel_config.pipeline_parallel_size
+                if (self.multiple_machines):
+                    ip_second = self.get_ip_value(ip)
+                    if (self.pp_size == 1):
+                        self.p2p_nccl_engine.send_tensor(request_id + "#" + layer_name,
+                                                    kv_cache, remote_address)
+                        self.p2p_nccl_engine.send_tensor(request_id + "#" + layer_name,
+                                                    kv_cache, str(ip_second) + ":" + str(port + self._rank + 8))
+                    elif (self.pp_size == 2):
+                        if (pp_rank == 0):
+                            self.p2p_nccl_engine.send_tensor(request_id + "#" + layer_name,
+                                                    kv_cache, remote_address)
+                        else:
+                            self.p2p_nccl_engine.send_tensor(request_id + "#" + layer_name,
+                                                        kv_cache, str(ip_second) + ":" + str(port + self._rank))
+                    else:
+                        print("Error: only suppprt pp1 pp2 !!!!!!")
+                else:
                     if (self.pp_size == 1):
                         self.p2p_nccl_engine.send_tensor(request_id + "#" + layer_name,
                                                     kv_cache, remote_address)