.. tiêu đề: Máy tính & Trình tạo cấu hình QoS DSCP
.. sên: qos-dscp-máy tính
.. ngày: 2026-02-02 16:00:00 UTC
.. tags: mạng, qos, dscp, máy tính, công cụ
.. thể loại: Công cụ
.. liên kết:
.. mô tả: Công cụ thiết kế QoS tương tác với máy tính DSCP, công cụ lập kế hoạch phân bổ băng thông và trình tạo cấu hình đa nhà cung cấp
.. loại: văn bản
<link href="/assets/css/tools-common.css" rel="stylesheet"/>
<style>
        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            margin: 0;
            padding: 0;
        }

        .calc-container {
            max-width: 1000px;
            margin: 20px auto;
            padding: 20px;
        }

        .calc-header {
            margin-bottom: 30px;
            padding: 25px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-radius: 12px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            color: white;
        }

        .calc-header h2 {
            margin-top: 0;
            color: white;
            font-size: 28px;
            margin-bottom: 10px;
        }

        .calc-header p {
            margin: 10px 0 20px 0;
            opacity: 0.95;
            font-size: 15px;
        }

        /* DSCP Converter in Header */
        .dscp-converter-compact {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 15px;
            margin-top: 20px;
        }

        .input-group {
            display: flex;
            flex-direction: column;
        }

        .input-group label {
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 14px;
            color: rgba(255,255,255,0.95);
        }

        .input-group input,
        .input-group select {
            padding: 14px;
            font-size: 16px;
            border: 2px solid rgba(255,255,255,0.3);
            border-radius: 6px;
            font-family: 'Courier New', monospace;
            background: rgba(255,255,255,0.95);
            transition: all 0.3s ease;
        }

        .input-group input:focus,
        .input-group select:focus {
            outline: none;
            border-color: #4CAF50;
            background: white;
            box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
        }

        .dscp-info {
            margin-top: 15px;
            padding: 12px;
            background: rgba(255,255,255,0.15);
            border-radius: 6px;
            font-size: 14px;
        }

        .dscp-info strong {
            color: white;
        }

        /* Quick Reference Table */
        .quick-reference {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 8px;
            margin-top: 15px;
        }

        .dscp-chip {
            background: rgba(255,255,255,0.15);
            padding: 8px 12px;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.2s ease;
            text-align: center;
            border: 2px solid transparent;
            color: inherit;
            font-family: inherit;
            width: 100%;
        }

        .dscp-chip:hover {
            background: rgba(255,255,255,0.25);
            border-color: rgba(255,255,255,0.4);
        }

        .dscp-chip:focus {
            outline: none;
            background: rgba(255,255,255,0.3);
            border-color: #4CAF50;
            box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.3);
        }

        .dscp-chip:active {
            transform: scale(0.98);
        }

        .dscp-chip .name {
            font-weight: bold;
            font-size: 13px;
        }

        .dscp-chip .value {
            font-size: 11px;
            opacity: 0.9;
            margin-top: 2px;
        }

        /* Section Tabs */
        .tabs {
            display: none; /* Hidden by default, shown after pathway selection */
            background: rgba(255,255,255,0.1);
            border-radius: 8px;
            margin-top: 20px;
            overflow: hidden;
        }

        .tabs.show {
            display: flex;
        }

        .tab {
            flex: 1;
            padding: 12px 20px;
            text-align: center;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.3s;
            color: rgba(255,255,255,0.8);
            border: none;
            background: transparent;
        }

        .tab:hover {
            background: rgba(255,255,255,0.15);
            color: white;
        }

        .tab.active {
            background: white;
            color: #667eea;
        }

        .tab-content {
            display: none;
        }

        .tab-content.active {
            display: block;
        }

        /* Sections */
        .section {
            margin-bottom: 30px;
            background: white;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }

        .section h3 {
            margin-top: 0;
            margin-bottom: 20px;
            color: #333;
            border-left: 5px solid #667eea;
            padding-left: 15px;
            font-size: 20px;
        }

        .section-header {
            background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
            color: white;
            padding: 15px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-radius: 8px 8px 0 0;
            margin: -20px -20px 20px -20px;
        }

        .section-header h3 {
            margin: 0;
            font-size: 18px;
            border: none;
            padding: 0;
            color: white;
        }

        /* Policy Designer */
        .traffic-class {
            background: #f8f9fa;
            padding: 15px;
            margin-bottom: 15px;
            border-radius: 8px;
            border-left: 4px solid #667eea;
        }

        .traffic-class-header {
            display: flex;
            gap: 15px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }

        .traffic-class-header input,
        .traffic-class-header select {
            flex: 1;
            min-width: 150px;
            padding: 10px;
            border: 2px solid #ced4da;
            border-radius: 6px;
            font-size: 14px;
        }

        .traffic-class-header input:focus,
        .traffic-class-header select:focus {
            outline: none;
            border-color: #667eea;
        }

        .remove-class-btn {
            background: #dc3545;
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
        }

        .remove-class-btn:hover {
            background: #c82333;
        }

        .btn {
            padding: 12px 24px;
            border: none;
            border-radius: 6px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }

        .btn-primary {
            background: #4CAF50;
            color: white;
        }

        .btn-primary:hover {
            background: #45a049;
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.3);
        }

        .btn-secondary {
            background: #6c757d;
            color: white;
        }

        .btn-secondary:hover {
            background: #5a6268;
        }

        .alert {
            padding: 15px 20px;
            border-radius: 8px;
            margin-bottom: 20px;
            border-left: 4px solid;
        }

        .alert-info {
            background: #d1ecf1;
            border-color: #17a2b8;
            color: #0c5460;
        }

        .alert-warning {
            background: #fff3cd;
            border-color: #ffc107;
            color: #856404;
        }

        .alert-success {
            background: #d4edda;
            border-color: #28a745;
            color: #155724;
        }

        .bandwidth-summary {
            background: white;
            padding: 20px;
            border-radius: 8px;
            margin-top: 20px;
            border: 2px solid #667eea;
        }

        .bandwidth-bar-container {
            margin: 20px 0;
        }

        .bandwidth-bar {
            height: 40px;
            display: flex;
            border-radius: 6px;
            overflow: hidden;
            border: 2px solid #dee2e6;
        }

        .bandwidth-segment {
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 12px;
            transition: all 0.3s ease;
        }

        /* Latency Calculator */
        .latency-calculator {
            background: white;
            padding: 20px;
            border-radius: 8px;
            margin-top: 20px;
            border: 2px solid #17a2b8;
        }

        .latency-class {
            background: #f8f9fa;
            padding: 20px;
            margin-bottom: 15px;
            border-radius: 8px;
            border-left: 4px solid #17a2b8;
        }

        .latency-class-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
            flex-wrap: wrap;
            gap: 10px;
        }

        .latency-class-name {
            font-weight: 600;
            font-size: 16px;
            color: #333;
        }

        .latency-result {
            font-size: 24px;
            font-weight: bold;
            font-family: 'Courier New', monospace;
        }

        .latency-result.good {
            color: #28a745;
        }

        .latency-result.warning {
            color: #ffc107;
        }

        .latency-result.critical {
            color: #dc3545;
        }

        .slider-container {
            margin-top: 15px;
        }

        .slider-label {
            display: flex;
            justify-content: space-between;
            margin-bottom: 8px;
            font-size: 14px;
            color: #666;
        }

        .slider-input {
            width: 100%;
            height: 8px;
            border-radius: 4px;
            background: #dee2e6;
            outline: none;
            -webkit-appearance: none;
        }

        .slider-input::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #17a2b8;
            cursor: pointer;
            box-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }

        .slider-input::-moz-range-thumb {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #17a2b8;
            cursor: pointer;
            box-shadow: 0 2px 4px rgba(0,0,0,0.2);
            border: none;
        }

        .slider-input:hover::-webkit-slider-thumb {
            background: #138496;
        }

        .slider-input:hover::-moz-range-thumb {
            background: #138496;
        }

        .latency-details {
            margin-top: 10px;
            padding-top: 10px;
            border-top: 1px solid #dee2e6;
            font-size: 13px;
            color: #666;
        }

        .config-output {
            background: #2d2d2d;
            color: #f8f8f2;
            padding: 20px;
            border-radius: 6px;
            font-family: 'Courier New', monospace;
            font-size: 13px;
            line-height: 1.6;
            overflow-x: auto;
            margin-top: 15px;
        }

        .copy-btn {
            background: #4CAF50;
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
            margin-top: 10px;
        }

        .copy-btn:hover {
            background: #45a049;
        }

        .vendor-selector {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .vendor-btn {
            padding: 10px 20px;
            background: white;
            border: 2px solid #667eea;
            color: #667eea;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: all 0.2s ease;
        }

        .vendor-btn:hover {
            background: #f0f0ff;
        }

        .vendor-btn.active {
            background: #667eea;
            color: white;
        }

        .hidden {
            display: none;
        }

        /* Getting Started Section */
        .getting-started {
            background: rgba(255,255,255,0.95);
            padding: 25px;
            border-radius: 8px;
            margin-top: 20px;
            border: 2px solid rgba(255,255,255,0.3);
        }

        .getting-started h3 {
            margin-top: 0;
            color: white;
            font-size: 20px;
        }

        .pathway-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 15px;
            margin-top: 15px;
        }

        .pathway-card {
            background: white;
            padding: 20px;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            border: 2px solid #dee2e6;
            text-align: center;
        }

        .pathway-card:hover {
            border-color: #667eea;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
        }

        .pathway-card:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.3);
        }

        .pathway-icon {
            font-size: 36px;
            margin-bottom: 10px;
        }

        .pathway-title {
            font-weight: bold;
            color: #333;
            margin-bottom: 8px;
            font-size: 16px;
        }

        .pathway-desc {
            color: #666;
            font-size: 13px;
        }

        /* Collapsible DSCP Converter */
        .dscp-converter-toggle {
            background: rgba(255,255,255,0.2);
            border: 2px solid rgba(255,255,255,0.3);
            padding: 12px 20px;
            border-radius: 8px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 20px;
            transition: all 0.2s ease;
            color: white;
            font-weight: 600;
        }

        .dscp-converter-toggle:hover {
            background: rgba(255,255,255,0.3);
        }

        .dscp-converter-toggle:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.3);
        }

        .toggle-icon {
            transition: transform 0.3s ease;
        }

        .toggle-icon.open {
            transform: rotate(180deg);
        }

        .dscp-converter-content {
            margin-top: 15px;
            display: none;
        }

        .dscp-converter-content.show {
            display: block;
            animation: slideDown 0.3s ease;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .calc-container {
                padding: 12px;
                margin: 10px auto;
            }

            .dscp-converter-compact {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .quick-reference {
                grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
                gap: 6px;
            }

            .dscp-chip {
                padding: 6px 10px;
                font-size: 12px;
            }

            .dscp-chip .name {
                font-size: 12px;
            }

            .dscp-chip .value {
                font-size: 10px;
            }

            .tabs {
                flex-direction: column;
            }

            .tab {
                padding: 10px 15px;
                border-right: none;
                border-bottom: 2px solid transparent;
            }

            .tab.active {
                border-right: none;
                border-bottom: 2px solid white;
            }

            .traffic-class-header {
                flex-direction: column;
            }

            .traffic-class-header input,
            .traffic-class-header select {
                width: 100%;
            }

            .section {
                padding: 15px;
            }

            .section h3 {
                font-size: 18px;
            }

            /* Minimum touch target size for mobile accessibility */
            .btn, button, .tab, .dscp-chip {
                min-height: 44px;
                min-width: 44px;
            }
        }

        @media (max-width: 480px) {
            .calc-container {
                padding: 8px;
            }

            .calc-header h2 {
                font-size: 22px;
            }

            .calc-header p {
                font-size: 14px;
            }

            .input-group label {
                font-size: 13px;
            }

            .input-group input,
            .input-group select {
                font-size: 14px;
                padding: 10px;
            }

            .btn {
                width: 100%;
                padding: 10px 16px;
                font-size: 14px;
            }
        }
    </style>

<body>
<div class="calc-container">
<div class="calc-header">
<h2>🎯 Trình tạo cấu hình và tính toán QoS DSCP</h2>
<p>Chuyển đổi giá trị DSCP, thiết kế chính sách QoS và tạo cấu hình nhiều nhà cung cấp cho mạng hội tụ</p>
Phần bắt đầu
<div class="getting-started" id="gettingStarted">
<h3 style="color: #333;">👋 Bạn muốn làm gì?</h3>
<div class="pathway-cards">
<button aria-label="Start with a pre-built QoS template" class="pathway-card" onclick="selectPathway('template')">
<div class="pathway-icon">📋</div>
<div class="pathway-title">Sử dụng mẫu</div>
<div class="pathway-desc">Bắt đầu với các mẫu Chăm sóc sức khỏe, Giáo dục hoặc Doanh nghiệp</div>
</button>
<button aria-label="Convert DSCP values between formats" class="pathway-card" onclick="selectPathway('converter')">
<div class="pathway-icon">🔄</div>
<div class="pathway-title">Chuyển đổi giá trị DSCP</div>
<div class="pathway-desc">Chuyển đổi nhanh giữa thập phân, hex và nhị phân</div>
</button>
<button aria-label="Design a custom QoS policy" class="pathway-card" onclick="selectPathway('design')">
<div class="pathway-icon">🎨</div>
<div class="pathway-title">Thiết kế chính sách tùy chỉnh</div>
<div class="pathway-desc">Xây dựng cấu hình QoS của riêng bạn từ đầu</div>
</button>
</div>
</div>
Bộ chuyển đổi DSCP có thể thu gọn
<button aria-controls="converterContent" aria-expanded="false" class="dscp-converter-toggle" id="converterToggle" onclick="toggleConverter()" style="display: none;">
<span>🔄 Bộ chuyển đổi DSCP nhanh</span>
<span class="toggle-icon" id="toggleIcon">▼</span>
</button>
<div class="dscp-converter-content" id="converterContent">
<div class="dscp-converter-compact">
<div class="input-group">
<label for="dscpDecimal">Thập phân (0-63):</label>
<input id="dscpDecimal" max="63" min="0" type="number" value="46"/>
</div>
<div class="input-group">
<label for="dscpHex">Thập lục phân:</label>
<input id="dscpHex" maxlength="4" type="text" value="0x2E"/>
</div>
<div class="input-group">
<label for="dscpBinary">Nhị phân (6 bit):</label>
<input id="dscpBinary" maxlength="6" type="text" value="101110"/>
</div>
<div class="input-group">
<label for="dscpName">Tên tiêu chuẩn:</label>
<select id="dscpName">
<option value="">Lựa chọn...</option>
</select>
</div>
</div>
<div class="dscp-info">
<strong>Giá trị hiện tại:</strong> <span id="currentValue">DSCP 46 (EF - Chuyển tiếp nhanh)</span><br/>
<strong>Trường hợp sử dụng:</strong> <span id="useCase">Lưu lượng thoại (VoIP)</span>
</div>
<div id="tosDisplay" style="margin-top: 15px; padding: 12px; background: #f0f0f0; border-radius: 6px; font-family: monospace;">
<strong>Phân tích byte IP ToS:</strong><br/>
<div style="display: grid; grid-template-columns: repeat(8, 1fr); gap: 2px; margin-top: 8px;">
<div style="border: 1px solid #999; padding: 4px; text-align: center; background: #e3f2fd; font-weight: bold;">D</div>
<div style="border: 1px solid #999; padding: 4px; text-align: center; background: #e3f2fd; font-weight: bold;">D</div>
<div style="border: 1px solid #999; padding: 4px; text-align: center; background: #e3f2fd; font-weight: bold;">D</div>
<div style="border: 1px solid #999; padding: 4px; text-align: center; background: #e3f2fd; font-weight: bold;">D</div>
<div style="border: 1px solid #999; padding: 4px; text-align: center; background: #e3f2fd; font-weight: bold;">D</div>
<div style="border: 1px solid #999; padding: 4px; text-align: center; background: #e3f2fd; font-weight: bold;">D</div>
<div style="border: 1px solid #999; padding: 4px; text-align: center; background: #fff9c4; font-weight: bold;">E</div>
<div style="border: 1px solid #999; padding: 4px; text-align: center; background: #fff9c4; font-weight: bold;">E</div>
</div>
<div style="font-size: 12px; margin-top: 8px; color: #666;">DSCP (bit 7-2):<strong id="tosDisplayDscp"></strong> = <strong id="tosDisplayDscpDec"></strong>|
                    ECN (bit 1-0):<strong id="tosDisplayEcn"></strong>|
                    Ưu tiên IP:<strong id="tosDisplayIpp"></strong>
</div>
</div>
Giá trị chung nhanh
<div style="margin-top: 15px;">
<label style="display: block; margin-bottom: 8px; font-weight: 600; font-size: 14px;">Chọn nhanh các giá trị chung:</label>
<div aria-label="Quick DSCP value selection" class="quick-reference" role="group">
<button aria-label="Select EF - Expedited Forwarding, DSCP 46, for Voice traffic" class="dscp-chip" onclick="setDSCP(46)">
<div class="name">EF</div>
<div class="value">46/ Giọng nói</div>
</button>
<button aria-label="Select AF41 - Assured Forwarding 41, DSCP 34, for Video traffic" class="dscp-chip" onclick="setDSCP(34)">
<div class="name">AF41</div>
<div class="value">34/Video</div>
</button>
<button aria-label="Select AF31 - Assured Forwarding 31, DSCP 26, for Streaming traffic" class="dscp-chip" onclick="setDSCP(26)">
<div class="name">AF31</div>
<div class="value">26 / Truyền phát</div>
</button>
<button aria-label="Select CS3 - Class Selector 3, DSCP 24, for Signaling traffic" class="dscp-chip" onclick="setDSCP(24)">
<div class="name">CS3</div>
<div class="value">24/ Báo hiệu</div>
</button>
<button aria-label="Select AF21 - Assured Forwarding 21, DSCP 18, for High Data traffic" class="dscp-chip" onclick="setDSCP(18)">
<div class="name">AF21</div>
<div class="value">18/ Dữ liệu cao</div>
</button>
<button aria-label="Select BE - Best Effort, DSCP 0, for Best Effort traffic" class="dscp-chip" onclick="setDSCP(0)">
<div class="name">LÀ</div>
<div class="value">0/ Nỗ lực hết mình</div>
</button>
</div>
</div>
</div> Kết thúc nội dung chuyển đổi dscp
Tab cho các tính năng bổ sung
<div class="tabs">
<button class="tab active" data-tab="policy">Nhà thiết kế chính sách</button>
<button class="tab" data-tab="config">Trình tạo cấu hình</button>
<button class="tab" data-tab="reference">Tham khảo đầy đủ</button>
</div>
</div>
Kiểm soát phiên
<div class="session-controls" id="sessionControls">
<span class="session-status" id="sessionStatus">Chưa lưu</span>
<button class="btn btn-small btn-secondary" onclick="clearSession()">Xóa dữ liệu đã lưu</button>
</div>
Khôi phục biểu ngữ
<div aria-live="polite" class="alert alert-info" id="restoreBanner" role="status" style="display: none;">
<strong>Đã tìm thấy phiên trước đó!</strong>
<button class="btn btn-small btn-primary" onclick="restoreSession()" style="margin: 0 10px;">Khôi phục</button>
<button class="btn btn-small btn-secondary" onclick="dismissRestore()">Bắt đầu mới</button>
</div>
Cách sử dụng bảng điều khiển
<div class="how-to-use">
<div class="how-to-use-header">
<span>📖 Cách sử dụng công cụ này</span>
<span class="toggle-icon">▼</span>
</div>
<div class="how-to-use-content">
<ul>
<li><strong>Bộ chuyển đổi DSCP:</strong>Chuyển đổi giữa các tên thập phân, hex, nhị phân và tiêu chuẩn trong tiêu đề</li>
<li><strong>Mẫu chính sách:</strong>Tải các chính sách được cấu hình sẵn cho các tình huống phổ biến (Chăm sóc sức khỏe, Giáo dục, Doanh nghiệp)</li>
<li><strong>Nhà thiết kế chính sách:</strong>Tạo các lớp lưu lượng, gán giá trị DSCP và phân bổ phần trăm băng thông</li>
<li><strong>Máy tính độ trễ:</strong>Điều chỉnh độ sâu hàng đợi để xem tác động của độ trễ theo thời gian thực đối với từng lớp</li>
<li><strong>Trình tạo cấu hình:</strong>Tạo cấu hình bộ định tuyến/chuyển mạch cho Cisco, Juniper, Arista và Aruba</li>
<li><strong>Tham khảo đầy đủ:</strong>Bảng tra cứu nhanh tất cả các giá trị DSCP tiêu chuẩn và trường hợp sử dụng</li>
</ul>
</div>
</div>
Tab 1: Nhà thiết kế chính sách
<div class="tab-content active" id="policy">
<div class="section">
<h3>Nhà thiết kế chính sách QoS</h3>
<div class="alert alert-info">
<strong>ℹ️ Thông tin:</strong>Xác định các lớp lưu lượng truy cập và phân bổ băng thông của bạn. Tổng số không được vượt quá 100%. Biểu đồ cập nhật tự động.</div>
Mẫu chính sách (Tính năng P0)
<div style="margin-bottom: 20px; padding: 15px; background: #f8f9fa; border-radius: 8px;">
<label style="display: block; margin-bottom: 10px; font-weight: 600;">Tải mẫu chính sách:<span class="tooltip-trigger" data-tooltip="Pre-configured policies optimized for common network scenarios.">?</span>
</label>
<select id="templateSelect" onchange="loadTemplate(this.value)" style="width: 100%; max-width: 400px; padding: 10px; border: 2px solid #ced4da; border-radius: 6px;">
<option value="">-- Chọn một mẫu --</option>
<option value="healthcare">Chăm sóc sức khỏe (Quan trọng bằng giọng nói)</option>
<option value="education">Giáo dục (Video nặng)</option>
<option value="enterprise">Doanh nghiệp (Cân bằng)</option>
<option value="retail">Bán lẻ (Khách + Doanh nghiệp)</option>
<option value="datacenter">Trung tâm dữ liệu (Đông-Tây)</option>
</select>
</div>
<div style="margin-bottom: 20px;">
<label style="display: block; margin-bottom: 10px; font-weight: 600;">Tốc độ liên kết (Mbps):<span class="tooltip-trigger" data-tooltip="Network link capacity - used for bandwidth calculations.">?</span>
</label>
<input id="linkSpeed" max="100000" min="1" style="width: 200px; padding: 10px; border: 2px solid #ced4da; border-radius: 6px;" type="number" value="1000"/>
</div>
<div id="trafficClasses"></div>
<div style="margin-top: 20px;">
<button class="btn btn-primary" id="addClass">+ Thêm loại giao thông</button>
</div>
<div class="bandwidth-summary" id="bandwidthSummary" style="display: none;">
<h4 style="margin-top: 0;">Phân bổ băng thông</h4>
<div aria-live="assertive" class="alert alert-warning hidden" id="totalWarning" role="alert">
<strong>⚠️ Cảnh báo:</strong>Tổng phân bổ băng thông vượt quá 100%! Điều chỉnh tỷ lệ phần trăm của bạn.</div>
<div aria-live="polite" class="alert alert-success hidden" id="totalSuccess" role="status">
<strong>✅ Hợp lệ:</strong>Tổng phân bổ là<span id="totalPercent">0</span>% - trong giới hạn.</div>
<div aria-atomic="true" aria-live="polite" class="bandwidth-bar-container">
<div aria-label="Bandwidth allocation visualization" class="bandwidth-bar" id="bandwidthBar" role="img"></div>
</div>
<div style="margin-top: 20px;">
<div style="display: flex; justify-content: space-between; margin-bottom: 10px;">
<strong>Tổng số được phân bổ:</strong>
<span id="totalAllocated">0 Mb/giây (0%)</span>
</div>
<div style="display: flex; justify-content: space-between;">
<strong>Còn lại:</strong>
<span id="remaining">1000 Mb/giây (100%)</span>
</div>
</div>
</div>
Máy tính tác động độ trễ
<div aria-atomic="true" aria-live="polite" class="latency-calculator" id="latencyCalculator" style="display: none;">
<h4 style="margin-top: 0;">⏱️ Máy tính tác động độ trễ</h4>
<div class="alert alert-info">
<strong>ℹ️ Thông tin:</strong>Điều chỉnh độ sâu hàng đợi cho từng loại lưu lượng để xem độ trễ xếp hàng trong trường hợp xấu nhất. Giọng nói phải dưới 20 mili giây, video dưới 50 mili giây.</div>
<div id="latencyClasses"></div>
<div style="margin-top: 20px; padding: 15px; background: #f8f9fa; border-radius: 6px;">
<h5 style="margin-top: 0;">Công thức tính toán:</h5>
<code style="background: white; padding: 10px; display: block; border-radius: 4px;">
                            Delay (ms) = (Queue Depth × Packet Size × 8) / (Link Speed × 1,000,000)
                        </code>
<p style="margin-bottom: 0; margin-top: 10px; font-size: 14px; color: #666;">Giả sử trường hợp xấu nhất trong đó tất cả các gói trong hàng đợi phải được truyền trước gói của bạn.</p>
</div>
</div>
</div>
</div>
Tab 2: Trình tạo cấu hình
<div class="tab-content" id="config">
<div class="section">
<h3>Trình tạo cấu hình</h3>
<div class="alert alert-warning">
<strong>⚠️ Lưu ý:</strong>Cấu hình được tạo là các mẫu. Luôn xem xét và thử nghiệm trong môi trường phòng thí nghiệm trước khi triển khai vào sản xuất.</div>
<p style="margin-bottom: 20px;">Thiết kế chính sách của bạn trong tab Trình thiết kế chính sách, sau đó chọn nền tảng nhà cung cấp của bạn bên dưới để tạo cấu hình.</p>
<h4 style="margin-bottom: 15px;">Chọn nền tảng nhà cung cấp:</h4>
<div class="vendor-selector">
<button class="vendor-btn active" data-vendor="cisco-ios">Cisco IOS/IOS-XE</button>
<button class="vendor-btn" data-vendor="cisco-nxos">Cisco NXOS</button>
<button class="vendor-btn" data-vendor="juniper">Juniper JunOS</button>
<button class="vendor-btn" data-vendor="arista">Arista EOS</button>
<button class="vendor-btn" data-vendor="aruba">Aruba AOS-CX</button>
</div>
<button class="btn btn-primary" id="generateConfig">Tạo cấu hình</button>
<div aria-atomic="false" aria-live="polite" class="hidden" id="configOutput">
<div class="config-output" id="configText"></div>
<button class="copy-btn" onclick="copyConfig()">📋 Sao chép vào Clipboard</button>
</div>
</div>
</div>
Tab 3: Tham khảo đầy đủ
<div class="tab-content" id="reference">
<div class="section">
<h3>Bảng tham khảo nhanh DSCP</h3>
<div style="overflow-x: auto;">
<table style="width: 100%; border-collapse: collapse;">
<thead>
<tr style="background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white;">
<th style="padding: 12px; text-align: left;">Tên</th>
<th style="padding: 12px; text-align: left;">Số thập phân</th>
<th style="padding: 12px; text-align: left;">lục giác</th>
<th style="padding: 12px; text-align: left;">nhị phân</th>
<th style="padding: 12px; text-align: left;">Trường hợp sử dụng</th>
</tr>
</thead>
<tbody id="referenceTable"></tbody>
</table>
</div>
</div>
</div>
</div>
<script>
    let calculationTimeout;
    let trafficClassesData = [];
    let selectedVendor = 'cisco-ios';

    // DSCP Standard Values (Complete RFC 3260 + RFC 5865)
    const dscpStandards = [
        { name: 'CS7', decimal: 56, useCase: 'System control traffic' },
        { name: 'CS6', decimal: 48, useCase: 'Network control and routing' },
        { name: 'EF', decimal: 46, useCase: 'Voice traffic (VoIP)' },
        { name: 'VA', decimal: 44, useCase: 'Voice Admit (RFC 5865)' },
        { name: 'CS5', decimal: 40, useCase: 'Signaling and network control' },
        { name: 'AF41', decimal: 34, useCase: 'Video conferencing' },
        { name: 'AF42', decimal: 36, useCase: 'Video conferencing' },
        { name: 'AF43', decimal: 38, useCase: 'Video conferencing' },
        { name: 'CS4', decimal: 32, useCase: 'Real-time interactive traffic' },
        { name: 'AF31', decimal: 26, useCase: 'Streaming video' },
        { name: 'AF32', decimal: 28, useCase: 'Streaming video' },
        { name: 'AF33', decimal: 30, useCase: 'Streaming video' },
        { name: 'CS3', decimal: 24, useCase: 'Call signaling' },
        { name: 'AF21', decimal: 18, useCase: 'High priority data' },
        { name: 'AF22', decimal: 20, useCase: 'High priority data' },
        { name: 'AF23', decimal: 22, useCase: 'High priority data' },
        { name: 'CS2', decimal: 16, useCase: 'OAM & management traffic' },
        { name: 'AF11', decimal: 10, useCase: 'Medium priority data' },
        { name: 'AF12', decimal: 12, useCase: 'Medium priority data' },
        { name: 'AF13', decimal: 14, useCase: 'Medium priority data' },
        { name: 'CS1', decimal: 8, useCase: 'Scavenger/Bulk' },
        { name: 'CS0/BE', decimal: 0, useCase: 'Best effort' }
    ];

    // Generate ToS Byte Display
    function generateToSByteDisplay(decimal) {
        // Create 8-bit ToS byte with DSCP in bits 7-2, ECN in bits 1-0
        const binary6bit = decimal.toString(2).padStart(6, '0');
        const binary8bit = binary6bit + '00'; // Assume ECN bits = 00

        // Extract IP Precedence (bits 7-5)
        const ipPrecedence = parseInt(binary8bit.substring(0, 3), 2);

        return {
            tosFullByte: binary8bit,
            dscpBits: binary6bit,
            ecnBits: '00',
            ipPrecedence: ipPrecedence
        };
    }

    // Pathway selection functions
    function selectPathway(pathway) {
        const gettingStarted = document.getElementById('gettingStarted');
        const converterToggle = document.getElementById('converterToggle');
        const tabsContainer = document.querySelector('.tabs');

        // Hide getting started
        gettingStarted.style.display = 'none';

        if (pathway === 'template') {
            // Show template selector and policy designer tab
            tabsContainer.classList.add('show');
            switchTab('policy');
            // Scroll to template selector
            setTimeout(() => {
                document.getElementById('templateSelect').scrollIntoView({ behavior: 'smooth', block: 'start' });
            }, 100);
        } else if (pathway === 'converter') {
            // Show DSCP converter
            converterToggle.style.display = 'flex';
            toggleConverter();
        } else if (pathway === 'design') {
            // Show tabs and go to policy designer
            tabsContainer.classList.add('show');
            converterToggle.style.display = 'flex';
            switchTab('policy');
        }
    }

    function toggleConverter() {
        const content = document.getElementById('converterContent');
        const toggle = document.getElementById('converterToggle');
        const icon = document.getElementById('toggleIcon');

        const isOpen = content.classList.contains('show');

        if (isOpen) {
            content.classList.remove('show');
            icon.classList.remove('open');
            toggle.setAttribute('aria-expanded', 'false');
        } else {
            content.classList.add('show');
            icon.classList.add('open');
            toggle.setAttribute('aria-expanded', 'true');
        }
    }

    // Initialize
    function init() {
        populateDSCPSelect();
        populateReferenceTable();
        setupEventListeners();
        updateDSCPDisplay();
        addTrafficClass(); // Add one default class
    }

    // Populate DSCP select dropdown
    function populateDSCPSelect() {
        const select = document.getElementById('dscpName');
        dscpStandards.forEach(dscp => {
            const option = document.createElement('option');
            option.value = dscp.decimal;
            option.textContent = `${dscp.name} (${dscp.decimal})`;
            select.appendChild(option);
        });
    }

    // Populate reference table
    function populateReferenceTable() {
        const tbody = document.getElementById('referenceTable');
        dscpStandards.forEach((dscp, index) => {
            const binary = dscp.decimal.toString(2).padStart(6, '0');
            const hex = '0x' + dscp.decimal.toString(16).toUpperCase().padStart(2, '0');
            const row = tbody.insertRow();
            row.style.background = index % 2 === 0 ? '#f8f9fa' : 'white';
            row.innerHTML = `
                <td style="padding: 10px; font-weight: bold;">${dscp.name}</td>
                <td style="padding: 10px; font-family: 'Courier New', monospace;">${dscp.decimal}</td>
                <td style="padding: 10px; font-family: 'Courier New', monospace;">${hex}</td>
                <td style="padding: 10px; font-family: 'Courier New', monospace;">${binary}</td>
                <td style="padding: 10px;">${dscp.useCase}</td>
            `;
        });
    }

    // Setup event listeners
    function setupEventListeners() {
        // DSCP converter inputs
        document.getElementById('dscpDecimal').addEventListener('input', () => {
            const val = parseInt(document.getElementById('dscpDecimal').value) || 0;
            setDSCP(Math.max(0, Math.min(63, val)));
        });

        document.getElementById('dscpHex').addEventListener('input', () => {
            const val = document.getElementById('dscpHex').value.replace('0x', '').replace('0X', '');
            if (val === '') return;

            // Validate hex format
            if (!/^[0-9A-Fa-f]{1,2}$/.test(val)) {
                return; // Silently skip invalid, let HTML5 validation handle
            }

            const decimal = parseInt(val, 16);
            if (decimal >= 0 && decimal <= 63) {
                setDSCP(decimal);
            }
        });

        document.getElementById('dscpBinary').addEventListener('input', () => {
            const val = document.getElementById('dscpBinary').value;
            if (val === '') return;

            // Validate binary format
            if (!/^[01]{1,6}$/.test(val)) {
                // Show error message
                const errorMsg = document.getElementById('conversionError') ||
                    (function() {
                        const div = document.createElement('div');
                        div.id = 'conversionError';
                        div.style.cssText = 'color: #c62828; font-size: 13px; margin-top: 8px; padding: 8px; background: #ffebee; border-radius: 4px;';
                        document.getElementById('converterContent').insertBefore(div, document.getElementById('dscpInfo'));
                        return div;
                    })();

                errorMsg.textContent = 'Binary must be 1-6 digits containing only 0s and 1s (e.g., 101110)';
                errorMsg.style.display = 'block';
                return;
            }

            // Clear error
            const errorMsg = document.getElementById('conversionError');
            if (errorMsg) errorMsg.style.display = 'none';

            // Pad to 6 bits and convert
            const padded = val.padStart(6, '0');
            const decimal = parseInt(padded, 2);
            setDSCP(decimal);
        });

        document.getElementById('dscpName').addEventListener('change', (e) => {
            if (e.target.value) {
                setDSCP(parseInt(e.target.value));
            }
        });

        // Tab switching
        document.querySelectorAll('.tab').forEach(tab => {
            tab.addEventListener('click', (e) => {
                const targetTab = e.target.dataset.tab;
                switchTab(targetTab);
            });
        });

        // Policy designer
        document.getElementById('addClass').addEventListener('click', addTrafficClass);
        document.getElementById('linkSpeed').addEventListener('input', updateBandwidthDisplay);

        // Config generator
        document.querySelectorAll('.vendor-btn').forEach(btn => {
            btn.addEventListener('click', (e) => {
                document.querySelectorAll('.vendor-btn').forEach(b => b.classList.remove('active'));
                e.target.classList.add('active');
                selectedVendor = e.target.dataset.vendor;
            });
        });

        document.getElementById('generateConfig').addEventListener('click', generateConfiguration);
    }

    // Set DSCP value and update all fields
    function setDSCP(decimal) {
        decimal = Math.max(0, Math.min(63, decimal));

        document.getElementById('dscpDecimal').value = decimal;
        document.getElementById('dscpHex').value = '0x' + decimal.toString(16).toUpperCase().padStart(2, '0');
        document.getElementById('dscpBinary').value = decimal.toString(2).padStart(6, '0');

        // Find matching standard name
        const match = dscpStandards.find(d => d.decimal === decimal);
        if (match) {
            document.getElementById('dscpName').value = decimal;
            document.getElementById('currentValue').textContent = `DSCP ${decimal} (${match.name})`;
            document.getElementById('useCase').textContent = match.useCase;
        } else {
            document.getElementById('dscpName').value = '';
            document.getElementById('currentValue').textContent = `DSCP ${decimal} (Custom)`;
            document.getElementById('useCase').textContent = 'Custom DSCP value';
        }

        // Update ToS byte display
        const tosInfo = generateToSByteDisplay(decimal);
        document.getElementById('tosDisplayDscp').textContent = tosInfo.dscpBits;
        document.getElementById('tosDisplayDscpDec').textContent = decimal;
        document.getElementById('tosDisplayEcn').textContent = tosInfo.ecnBits;
        document.getElementById('tosDisplayIpp').textContent = tosInfo.ipPrecedence + ' (Legacy IPP)';
    }

    // Update DSCP display
    function updateDSCPDisplay() {
        setDSCP(46); // Default to EF
    }

    // Switch tab
    function switchTab(tabName) {
        document.querySelectorAll('.tab').forEach(t => t.classList.remove('active'));
        document.querySelectorAll('.tab-content').forEach(c => c.classList.remove('active'));

        document.querySelector(`.tab[data-tab="${tabName}"]`).classList.add('active');
        document.getElementById(tabName).classList.add('active');
    }

    // Add traffic class
    function addTrafficClass() {
        const id = Date.now();
        trafficClassesData.push({
            id: id,
            name: `Class ${trafficClassesData.length + 1}`,
            dscp: 0,
            bandwidth: 10
        });

        renderTrafficClasses();
        updateBandwidthDisplay();
    }

    // Render traffic classes
    function renderTrafficClasses() {
        const container = document.getElementById('trafficClasses');
        container.innerHTML = trafficClassesData.map(tc => `
            <div class="traffic-class">
                <div class="traffic-class-header">
                    <input type="text" value="${tc.name}" onchange="updateClass(${tc.id}, 'name', this.value)" placeholder="Class Name">
                    <select onchange="updateClass(${tc.id}, 'dscp', this.value)">
                        ${dscpStandards.map(d => `
                            <option value="${d.decimal}" ${tc.dscp == d.decimal ? 'selected' : ''}>${d.name} (${d.decimal})</option>
                        `).join('')}
                    </select>
                    <input type="number" value="${tc.bandwidth}" onchange="updateClass(${tc.id}, 'bandwidth', this.value)" placeholder="%" min="0" max="100" style="width: 100px;">
                    <button class="remove-class-btn" onclick="removeClass(${tc.id})">Remove</button>
                </div>
            </div>
        `).join('');
    }

    // Update traffic class
    function updateClass(id, field, value) {
        const tc = trafficClassesData.find(t => t.id === id);
        if (tc) {
            tc[field] = field === 'bandwidth' || field === 'dscp' ? parseFloat(value) : value;
            updateBandwidthDisplay();
        }
    }

    // Remove traffic class
    function removeClass(id) {
        trafficClassesData = trafficClassesData.filter(t => t.id !== id);
        renderTrafficClasses();
        updateBandwidthDisplay();
    }

    // Update bandwidth display
    function updateBandwidthDisplay() {
        if (trafficClassesData.length === 0) {
            document.getElementById('bandwidthSummary').style.display = 'none';
            return;
        }

        document.getElementById('bandwidthSummary').style.display = 'block';

        const linkSpeed = parseFloat(document.getElementById('linkSpeed').value) || 1000;
        const totalPercent = trafficClassesData.reduce((sum, tc) => sum + tc.bandwidth, 0);
        const totalMbps = (totalPercent / 100) * linkSpeed;
        const remaining = linkSpeed - totalMbps;
        const remainingPercent = 100 - totalPercent;

        // Update displays
        document.getElementById('totalPercent').textContent = totalPercent.toFixed(1);
        document.getElementById('totalAllocated').textContent = `${totalMbps.toFixed(0)} Mbps (${totalPercent.toFixed(1)}%)`;
        document.getElementById('remaining').textContent = `${remaining.toFixed(0)} Mbps (${remainingPercent.toFixed(1)}%)`;

        // Show/hide warnings
        if (totalPercent > 100) {
            document.getElementById('totalWarning').classList.remove('hidden');
            document.getElementById('totalSuccess').classList.add('hidden');
        } else {
            document.getElementById('totalWarning').classList.add('hidden');
            document.getElementById('totalSuccess').classList.remove('hidden');
        }

        // Update bandwidth bar
        const bar = document.getElementById('bandwidthBar');
        const colors = ['#667eea', '#4CAF50', '#ffc107', '#17a2b8', '#e83e8c', '#fd7e14'];
        bar.innerHTML = trafficClassesData.map((tc, i) => `
            <div class="bandwidth-segment" style="width: ${tc.bandwidth}%; background: ${colors[i % colors.length]};">
                ${tc.bandwidth}%
            </div>
        `).join('');

        // Update latency calculator
        updateLatencyCalculator();
    }

    // Update latency calculator
    function updateLatencyCalculator() {
        if (trafficClassesData.length === 0) {
            document.getElementById('latencyCalculator').style.display = 'none';
            return;
        }

        document.getElementById('latencyCalculator').style.display = 'block';
        renderLatencyClasses();
    }

    // Render latency classes
    function renderLatencyClasses() {
        const container = document.getElementById('latencyClasses');

        // Default packet sizes for common traffic types (in bytes)
        const packetSizes = {
            46: 200,   // EF - Voice (small packets)
            34: 1500,  // AF41 - Video
            26: 1500,  // AF31 - Streaming
            24: 200,   // CS3 - Signaling (small packets)
            18: 1500,  // AF21 - High Data
            10: 1500,  // AF11 - Medium Data
            0: 1500    // BE - Best Effort
        };

        container.innerHTML = trafficClassesData.map((tc, i) => {
            // Initialize queue depth if not set
            if (!tc.queueDepth) tc.queueDepth = 10;

            const packetSize = packetSizes[tc.dscp] || 1500;
            const linkSpeed = parseFloat(document.getElementById('linkSpeed').value) || 1000;

            // Calculate latency: (Queue Depth × Packet Size × 8 bits/byte) / (Link Speed in Mbps × 1,000,000)
            const latencyMs = (tc.queueDepth * packetSize * 8) / (linkSpeed * 1000);

            // Determine color based on thresholds
            let latencyClass = 'good';
            let threshold = 'Good';
            if (tc.dscp === 46) { // Voice
                if (latencyMs > 20) {
                    latencyClass = 'critical';
                    threshold = 'Critical (>20ms for voice)';
                } else if (latencyMs > 10) {
                    latencyClass = 'warning';
                    threshold = 'Warning (>10ms for voice)';
                } else {
                    threshold = 'Good (<10ms for voice)';
                }
            } else if (tc.dscp >= 26 && tc.dscp <= 38) { // Video
                if (latencyMs > 50) {
                    latencyClass = 'critical';
                    threshold = 'Critical (>50ms for video)';
                } else if (latencyMs > 30) {
                    latencyClass = 'warning';
                    threshold = 'Warning (>30ms for video)';
                } else {
                    threshold = 'Good (<30ms for video)';
                }
            } else { // Data
                if (latencyMs > 100) {
                    latencyClass = 'warning';
                    threshold = 'High latency (>100ms)';
                } else {
                    threshold = 'Acceptable';
                }
            }

            // Add status icon based on latency class
            let statusIcon = '✓';
            if (latencyClass === 'critical') statusIcon = '✗';
            else if (latencyClass === 'warning') statusIcon = '⚠';

            return `
                <div class="latency-class">
                    <div class="latency-class-header">
                        <div class="latency-class-name">${tc.name}</div>
                        <div class="latency-result ${latencyClass}" id="latency-${tc.id}">
                            ${statusIcon} ${latencyMs.toFixed(2)} ms
                        </div>
                    </div>
                    <div class="slider-container">
                        <div class="slider-label">
                            <span>Queue Depth (packets):</span>
                            <span id="queueDepth-${tc.id}">${tc.queueDepth}</span>
                        </div>
                        <input
                            type="range"
                            class="slider-input"
                            min="1"
                            max="100"
                            value="${tc.queueDepth}"
                            oninput="updateQueueDepth(${tc.id}, this.value)"
                            aria-label="Adjust queue depth for ${tc.name}"
                        >
                    </div>
                    <div class="latency-details">
                        <strong>Status:</strong> ${statusIcon} ${threshold}<br>
                        <strong>Packet Size:</strong> ${packetSize} bytes<br>
                        <strong>Calculation:</strong> (${tc.queueDepth} packets × ${packetSize} bytes × 8 bits) / (${linkSpeed} Mbps × 1,000,000) = ${latencyMs.toFixed(2)} ms
                    </div>
                </div>
            `;
        }).join('');
    }

    // Update queue depth for latency calculation
    function updateQueueDepth(id, depth) {
        const tc = trafficClassesData.find(t => t.id === id);
        if (tc) {
            tc.queueDepth = parseInt(depth);
            document.getElementById('queueDepth-' + id).textContent = depth;
            renderLatencyClasses();
        }
    }

    // Generate configuration
    function generateConfiguration() {
        if (trafficClassesData.length === 0) {
            alert('Please add at least one traffic class in the Policy Designer tab.');
            return;
        }

        const config = generateConfigForVendor(selectedVendor);
        document.getElementById('configText').innerHTML = config;
        document.getElementById('configOutput').classList.remove('hidden');
    }

    // Generate vendor-specific config
    function generateConfigForVendor(vendor) {
        let config = '';

        if (vendor === 'cisco-ios') {
            config = `! Cisco IOS/IOS-XE QoS Configuration\n!\n`;

            // Class maps
            trafficClassesData.forEach(tc => {
                config += `class-map match-any ${tc.name.replace(/ /g, '-')}\n`;
                config += ` match dscp ${tc.dscp}\n!\n`;
            });

            // Policy map
            config += `policy-map QOS-POLICY\n`;
            trafficClassesData.forEach(tc => {
                config += ` class ${tc.name.replace(/ /g, '-')}\n`;
                config += `  bandwidth percent ${tc.bandwidth}\n`;
            });
            config += `!\n! Apply to interface\ninterface GigabitEthernet0/0\n service-policy output QOS-POLICY\n`;

        } else if (vendor === 'cisco-nxos') {
            config = `! Cisco NXOS QoS Configuration\n!\n`;
            trafficClassesData.forEach(tc => {
                config += `class-map type qos match-all ${tc.name.replace(/ /g, '-')}\n`;
                config += ` match dscp ${tc.dscp}\n!\n`;
            });

            config += `policy-map type qos QOS-POLICY\n`;
            trafficClassesData.forEach(tc => {
                config += ` class ${tc.name.replace(/ /g, '-')}\n`;
                config += `  bandwidth percent ${tc.bandwidth}\n`;
            });
            config += `!\n! Apply to interface\ninterface Ethernet1/1\n service-policy type qos output QOS-POLICY\n`;

        } else if (vendor === 'juniper') {
            config = `# Juniper JunOS QoS Configuration\n#\n`;
            config += `set class-of-service classifiers dscp QOS-CLASSIFIER {\n`;
            trafficClassesData.forEach((tc, i) => {
                config += `  forwarding-class ${tc.name.replace(/ /g, '-')} {\n`;
                config += `    loss-priority low code-points ${tc.dscp}\n`;
                config += `  }\n`;
            });
            config += `}\n`;

        } else if (vendor === 'arista') {
            config = `! Arista EOS QoS Configuration\n!\n`;
            trafficClassesData.forEach(tc => {
                config += `class-map type qos match-any ${tc.name.replace(/ /g, '-')}\n`;
                config += ` match dscp ${tc.dscp}\n!\n`;
            });

        } else if (vendor === 'aruba') {
            config = `! Aruba AOS-CX QoS Configuration\n!\n`;
            trafficClassesData.forEach(tc => {
                config += `qos dscp-map ${tc.name.replace(/ /g, '-')} code-point ${tc.dscp} local-priority ${Math.min(7, Math.floor(tc.dscp / 8))}\n`;
            });
        }

        return config;
    }

    // Copy config to clipboard
    function copyConfig() {
        const text = document.getElementById('configText').textContent;
        navigator.clipboard.writeText(text).then(() => {
            alert('Configuration copied to clipboard!');
        });
    }

    // Policy Templates (P0 Feature)
    const policyTemplates = {
        healthcare: {
            name: "Healthcare (Voice-Critical)",
            classes: [
                { name: "Voice (VoIP)", dscp: 46, bandwidth: 30 },
                { name: "Medical Imaging", dscp: 34, bandwidth: 25 },
                { name: "EMR Data", dscp: 18, bandwidth: 20 },
                { name: "Best Effort", dscp: 0, bandwidth: 25 }
            ]
        },
        education: {
            name: "Education (Video-Heavy)",
            classes: [
                { name: "Video Conferencing", dscp: 34, bandwidth: 40 },
                { name: "Voice", dscp: 46, bandwidth: 15 },
                { name: "Learning Apps", dscp: 18, bandwidth: 25 },
                { name: "Best Effort", dscp: 0, bandwidth: 20 }
            ]
        },
        enterprise: {
            name: "Enterprise (Balanced)",
            classes: [
                { name: "Voice", dscp: 46, bandwidth: 20 },
                { name: "Video", dscp: 34, bandwidth: 25 },
                { name: "Business Critical", dscp: 26, bandwidth: 25 },
                { name: "Best Effort", dscp: 0, bandwidth: 30 }
            ]
        },
        retail: {
            name: "Retail (Guest + Corporate)",
            classes: [
                { name: "POS Systems", dscp: 34, bandwidth: 30 },
                { name: "Corporate Voice", dscp: 46, bandwidth: 15 },
                { name: "Corporate Data", dscp: 18, bandwidth: 25 },
                { name: "Guest WiFi", dscp: 0, bandwidth: 30 }
            ]
        },
        datacenter: {
            name: "Data Center (East-West)",
            classes: [
                { name: "Storage Replication", dscp: 26, bandwidth: 35 },
                { name: "Database", dscp: 18, bandwidth: 30 },
                { name: "Application", dscp: 10, bandwidth: 25 },
                { name: "Best Effort", dscp: 0, bandwidth: 10 }
            ]
        }
    };

    function loadTemplate(templateKey) {
        if (!templateKey) return;

        const template = policyTemplates[templateKey];
        if (!template) return;

        // Clear existing classes
        trafficClassesData = [];

        // Load template classes
        template.classes.forEach(tc => {
            trafficClassesData.push({
                id: Date.now() + Math.random(),
                name: tc.name,
                dscp: tc.dscp,
                bandwidth: tc.bandwidth,
                queueDepth: 10 // Default queue depth
            });
        });

        // Update displays
        renderTrafficClasses();
        updateBandwidthDisplay();

        // Reset template selector
        document.getElementById('templateSelect').value = '';

        // Show success message
        const alert = document.createElement('div');
        alert.className = 'alert alert-success fade-in';
        alert.innerHTML = `<strong>✓ Template Loaded:</strong> ${template.name} policy applied successfully.`;
        alert.style.marginTop = '15px';

        const templateSelect = document.getElementById('templateSelect').parentElement;
        templateSelect.appendChild(alert);

        setTimeout(() => {
            alert.remove();
        }, 3000);
    }

    // Session Management (P0 Feature)
    let sessionManager;

    function initializeSessionManagement() {
        sessionManager = new SessionManager('qos-calculator');

        // Check for previous session
        const savedData = sessionManager.promptRestore();

        // Start auto-save
        sessionManager.startAutoSave(() => {
            return {
                linkSpeed: document.getElementById('linkSpeed').value,
                trafficClasses: trafficClassesData,
                selectedVendor: selectedVendor
            };
        });
    }

    function restoreSession() {
        const data = sessionManager.load();
        if (data) {
            if (data.linkSpeed) {
                document.getElementById('linkSpeed').value = data.linkSpeed;
            }

            if (data.trafficClasses && data.trafficClasses.length > 0) {
                trafficClassesData = data.trafficClasses;
                renderTrafficClasses();
                updateBandwidthDisplay();
            }

            if (data.selectedVendor) {
                selectedVendor = data.selectedVendor;
                document.querySelectorAll('.vendor-btn').forEach(btn => {
                    if (btn.dataset.vendor === selectedVendor) {
                        btn.classList.add('active');
                    } else {
                        btn.classList.remove('active');
                    }
                });
            }

            document.getElementById('restoreBanner').style.display = 'none';
        }
    }

    function dismissRestore() {
        document.getElementById('restoreBanner').style.display = 'none';
    }

    function clearSession() {
        if (confirm('Clear all saved data?')) {
            sessionManager.clear();
            document.getElementById('linkSpeed').value = 1000;
            trafficClassesData = [];
            renderTrafficClasses();
            updateBandwidthDisplay();
        }
    }

    function formatNumber(num) {
        return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ',');
    }

    function animateCards(containerSelector, delay) {
        const cards = document.querySelectorAll(`${containerSelector} .result-card, ${containerSelector} .latency-class`);
        cards.forEach((card, index) => {
            setTimeout(() => {
                card.classList.add('fade-in');
            }, index * delay);
        });
    }

    // Initialize on load
    init();

    // Load common utilities after DOM is ready
    const commonScript = document.createElement('script');
    commonScript.src = '/assets/js/tools-common.js';
    commonScript.onload = () => {
        initializeSessionManagement();
    };
    document.head.appendChild(commonScript);
    </script></body>