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GVC: スプリットトンネルでローカルISPからのインターネット接続速度が低下する

01/12/2022 3 People found this article helpful 53,193 Views

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    Description


    この記事では、GVCがスプリットトンネリングを使用するように設定されているにもかかわらず、GVCソフトウェアを接続するとスループットが極端に低下する問題を取り上げます。
    また、GVCを切断しても、PCを再起動するまでスループットが回復しないケースもあります。

    Cause

    この問題は、ネットワークアダプターのReceive Segment Coalescing (RSC)に関連するWindows 10オペレーティングシステムの特定のビルドで、Microsoftチームによって確認されました。

    参考リンク:

    https://answers.microsoft.com/en-us/windows/forum/windows_10-networking/wifi-issues-with-creators-update/4a20ba4f-33dc-4397-9823-e12dcb2607ba?auth=1

    Resolution

    Windows 10の新しいパッチファイルがリリースされ、この問題に対処していますので、Windows OSを最新のパッチにアップグレードするか、次の回避策を実行してください。

    • コマンドプロンプトを管理者として実行します
      スタート > すべてのアプリ> Windowsシステムツール> ”コマンドプロンプト”を右クリック> その他 > 管理者として実行

    • ネットワークアダプタ名を確認します

      powershell Get-NetAdapter


      Image

    • "Receive segment coalescing" (Rsc) 設定を確認します:

      powershell Get-NetAdapterRsc
      Image

    • ネットワークアダプタのRSCを無効化します:

      powershell Disable-NetAdapterRsc -Name ADAPTER_NAME_FROM_BEFORE

      .

      注意: ADAPTER_NAME_FROM_BEFOREは、必ずネットワークアダプターの名前に置き換えてください(引用符は使用しないでください)。

      Image

    • RSCが無効化された事を確認します。

      powershell Get-NetAdapterRsc

      IPv4Enabledの状態がFalse, かつ IPv6Enabledの状態がFalseと表示されるはずです,
      Image

    • GVCを起動してインターネット接続速度が改善した事を確認します。

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