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创建 PowerShell 脚本，19点到23点每半小时执行1次，统计网卡连接数

建议采用 PowerShell + BAT + 计划任务(Task Scheduler) 的方式，因为你列出的命令都是 PowerShell Cmdlet，直接写到 BAT 中会比较麻烦。

1. 创建 PowerShell 脚本

保存为：

D:\temp\get_connection.ps1

内容如下：

$LogFile = "D:\temp\get_connection.log"

Add-Content $LogFile ""
Add-Content $LogFile "============================================================"
Add-Content $LogFile "$(Get-Date -Format 'yyyy-MM-dd HH:mm:ss')"
Add-Content $LogFile "============================================================"

Add-Content $LogFile ""
Add-Content $LogFile "[Get-NetTCPConnection | Measure-Object]"
Get-NetTCPConnection | Measure-Object | Out-String | Add-Content $LogFile

Add-Content $LogFile ""
Add-Content $LogFile "[Get-NetAdapterVmq]"
Get-NetAdapterVmq | Format-Table -AutoSize | Out-String | Add-Content $LogFile

Add-Content $LogFile ""
Add-Content $LogFile "[Get-NetAdapterStatistics]"
Get-NetAdapterStatistics | Format-Table -AutoSize | Out-String | Add-Content $LogFile

Add-Content $LogFile ""
Add-Content $LogFile "[Get-NetTCPConnection | Group-Object State]"
Get-NetTCPConnection | Group-Object State | Format-Table -AutoSize | Out-String | Add-Content $LogFile

Add-Content $LogFile ""
Add-Content $LogFile "[Network Interface Bytes Total/sec]"
Get-Counter '\Network Interface(*)\Bytes Total/sec' |
Select-Object -ExpandProperty CounterSamples |
Format-Table InstanceName,CookedValue -AutoSize |
Out-String | Add-Content $LogFile

Add-Content $LogFile ""
Add-Content $LogFile "[Hyper-V Virtual Switch Bytes/sec]"
Get-Counter '\Hyper-V Virtual Switch(*)\Bytes/sec' |
Select-Object -ExpandProperty CounterSamples |
Format-Table InstanceName,CookedValue -AutoSize |
Out-String | Add-Content $LogFile

Add-Content $LogFile ""
Add-Content $LogFile "[Network Interface Packets Sent/sec]"
Get-Counter '\Network Interface(*)\Packets Sent/sec' |
Select-Object -ExpandProperty CounterSamples |
Format-Table InstanceName,CookedValue -AutoSize |
Out-String | Add-Content $LogFile

Add-Content $LogFile ""
Add-Content $LogFile "[Hyper-V Virtual Network Adapter Bytes/sec]"
Get-Counter '\Hyper-V Virtual Network Adapter(*)\Bytes/sec' |
Select-Object -ExpandProperty CounterSamples |
Format-Table InstanceName,CookedValue -AutoSize |
Out-String | Add-Content $LogFile

2. 创建 BAT 启动脚本

保存为：

D:\temp\get_connection.bat

内容：

@echo off
powershell.exe -NoProfile -ExecutionPolicy Bypass -File "D:\temp\get_connection.ps1"

测试：

D:\temp\get_connection.bat

查看：

D:\temp\get_connection.log

是否生成日志。

3. 创建计划任务

打开：

任务计划程序
(Task Scheduler)

创建任务：

常规

名称：
Get_Connection_Monitor

使用最高权限运行
无论用户是否登录都运行

触发器

新增 8 个触发器：

时间
19:30
20:00
20:30
21:00
21:30
22:00
22:30
23:00

操作：

启动程序

程序：

D:\temp\get_connection.bat

4. PowerShell 一键创建计划任务（推荐）

管理员 PowerShell 执行：

$action = New-ScheduledTaskAction `
-Execute "D:\temp\get_connection.bat"

$times = @(
"19:30",
"20:00",
"20:30",
"21:00",
"21:30",
"22:00",
"22:30",
"23:00"
)

foreach ($t in $times)
{
    $trigger = New-ScheduledTaskTrigger `
        -Daily `
        -At $t

    Register-ScheduledTask `
        -TaskName ("GetConnection_" + $t.Replace(":","")) `
        -Action $action `
        -Trigger $trigger `
        -RunLevel Highest `
        -Force
}

5. 建议增加 TCP 关键指标

为了分析你当前 Hyper-V + NAT + 70万连接场景，建议额外记录：

netstat -ano | find /c "ESTABLISHED"

Get-NetTCPSetting

Get-NetOffloadGlobalSetting

Get-NetAdapterRss

Get-NetAdapterVmq

Get-VMNetworkAdapter -ManagementOS

添加后的完整D:\temp\get_connection.ps1文件内容：

$LogFile = "D:\temp\get_connection.log"

Add-Content $LogFile ""
Add-Content $LogFile "===================================================================="
Add-Content $LogFile "$(Get-Date -Format 'yyyy-MM-dd HH:mm:ss')"
Add-Content $LogFile "===================================================================="

# TCP连接总数
Add-Content $LogFile ""
Add-Content $LogFile "[Get-NetTCPConnection | Measure-Object]"
Get-NetTCPConnection | Measure-Object | Out-String | Add-Content $LogFile

# TCP状态统计
Add-Content $LogFile ""
Add-Content $LogFile "[Get-NetTCPConnection | Group-Object State]"
Get-NetTCPConnection | Group-Object State |
Sort-Object Count -Descending |
Format-Table Count,Name -AutoSize |
Out-String | Add-Content $LogFile

# ESTABLISHED数量
Add-Content $LogFile ""
Add-Content $LogFile "[ESTABLISHED Count]"
(netstat -ano | findstr ESTABLISHED | Measure-Object -Line).Lines |
Out-String | Add-Content $LogFile

# VMQ状态
Add-Content $LogFile ""
Add-Content $LogFile "[Get-NetAdapterVmq]"
Get-NetAdapterVmq |
Format-Table -AutoSize |
Out-String | Add-Content $LogFile

# RSS状态
Add-Content $LogFile ""
Add-Content $LogFile "[Get-NetAdapterRss]"
Get-NetAdapterRss |
Format-Table -AutoSize |
Out-String | Add-Content $LogFile

# 网卡统计
Add-Content $LogFile ""
Add-Content $LogFile "[Get-NetAdapterStatistics]"
Get-NetAdapterStatistics |
Format-Table -AutoSize |
Out-String | Add-Content $LogFile

# TCP参数
Add-Content $LogFile ""
Add-Content $LogFile "[Get-NetTCPSetting]"
Get-NetTCPSetting |
Format-Table -AutoSize |
Out-String | Add-Content $LogFile

# 网卡卸载状态
Add-Content $LogFile ""
Add-Content $LogFile "[Get-NetOffloadGlobalSetting]"
Get-NetOffloadGlobalSetting |
Format-List |
Out-String | Add-Content $LogFile

# Hyper-V虚拟网卡
Add-Content $LogFile ""
Add-Content $LogFile "[Get-VMNetworkAdapter -ManagementOS]"
try {
    Get-VMNetworkAdapter -ManagementOS |
    Format-Table -AutoSize |
    Out-String | Add-Content $LogFile
}
catch {
    Add-Content $LogFile "Hyper-V module not available."
}

# 网络流量
Add-Content $LogFile ""
Add-Content $LogFile "[Network Interface Bytes Total/sec]"
Get-Counter '\Network Interface(*)\Bytes Total/sec' |
Select-Object -ExpandProperty CounterSamples |
Format-Table InstanceName,CookedValue -AutoSize |
Out-String | Add-Content $LogFile

# 网卡PPS
Add-Content $LogFile ""
Add-Content $LogFile "[Network Interface Packets Sent/sec]"
Get-Counter '\Network Interface(*)\Packets Sent/sec' |
Select-Object -ExpandProperty CounterSamples |
Format-Table InstanceName,CookedValue -AutoSize |
Out-String | Add-Content $LogFile

Add-Content $LogFile ""
Add-Content $LogFile "[Network Interface Packets Received/sec]"
Get-Counter '\Network Interface(*)\Packets Received/sec' |
Select-Object -ExpandProperty CounterSamples |
Format-Table InstanceName,CookedValue -AutoSize |
Out-String | Add-Content $LogFile

# Hyper-V Virtual Switch流量
Add-Content $LogFile ""
Add-Content $LogFile "[Hyper-V Virtual Switch Bytes/sec]"
Get-Counter '\Hyper-V Virtual Switch(*)\Bytes/sec' |
Select-Object -ExpandProperty CounterSamples |
Format-Table InstanceName,CookedValue -AutoSize |
Out-String | Add-Content $LogFile

# Hyper-V Virtual Adapter流量
Add-Content $LogFile ""
Add-Content $LogFile "[Hyper-V Virtual Network Adapter(*)\Bytes/sec]"
Get-Counter '\Hyper-V Virtual Network Adapter(*)\Bytes/sec' |
Select-Object -ExpandProperty CounterSamples |
Format-Table InstanceName,CookedValue -AutoSize |
Out-String | Add-Content $LogFile

# CPU
Add-Content $LogFile ""
Add-Content $LogFile "[CPU]"
Get-Counter '\Processor(*)\% Processor Time' |
Select-Object -ExpandProperty CounterSamples |
Format-Table InstanceName,CookedValue -AutoSize |
Out-String | Add-Content $LogFile

# 网络队列长度
Add-Content $LogFile ""
Add-Content $LogFile "[Network Output Queue Length]"
Get-Counter '\Network Interface(*)\Output Queue Length' |
Select-Object -ExpandProperty CounterSamples |
Format-Table InstanceName,CookedValue -AutoSize |
Out-String | Add-Content $LogFile

# Hyper-V VM Switch丢包
Add-Content $LogFile ""
Add-Content $LogFile "[Hyper-V Switch Packets/sec]"
try {
    Get-Counter '\Hyper-V Virtual Switch(*)\Packets/sec' |
    Select-Object -ExpandProperty CounterSamples |
    Format-Table InstanceName,CookedValue -AutoSize |
    Out-String | Add-Content $LogFile
}
catch {
    Add-Content $LogFile "Counter not available."
}

Add-Content $LogFile ""
Add-Content $LogFile "END"

这两个对于判断 Hyper-V 在 70 万 NAT 连接场景下是否存在 RSS/VMQ 瓶颈非常有帮助。

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