.. عنوان: ECMP فلو ہیش کیلکولیٹر
.. slug: ecmp-flow-hash-calculator
.. تاریخ: 2026-03-27 12:00:00 UTC
.. ٹیگز: نیٹ ورکنگ، ای سی ایم پی، لوڈ بیلنسنگ، ہیشنگ، کیلکولیٹر، ٹول
.. زمرہ: کیلکولیٹر
.. لنک:
.. تفصیل: ایک 5-ٹپل ان پٹ کریں اور حساب لگائیں کہ کون سا ECMP اپلنک اسے XOR، CRC32، اور FNV-1a وینڈر ہیش الگورتھم کے تحت ہیش کرتا ہے۔ غیر مساوی بوجھ کی تقسیم کی تشخیص کریں۔
.. قسم: متن
<style>
/* ── CANONICAL DESIGN SYSTEM ──────────────────────────────────────────────── */
.calc-container { max-width: 900px; 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; opacity: 0.95; font-size: 15px; }
.input-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 15px; margin-top: 20px; }
.input-group { display: flex; flex-direction: column; }
.input-group label { margin-bottom: 8px; font-weight: 600; color: rgba(255,255,255,0.95); font-size: 14px; }
.input-group input, .input-group select, .input-group textarea { padding: 14px; font-size: 14px; border: 2px solid rgba(255,255,255,0.3); border-radius: 6px; background: rgba(255,255,255,0.95); transition: all 0.3s ease; box-sizing: border-box; font-family: inherit; }
.input-group input:focus, .input-group select:focus, .input-group textarea:focus { outline: none; border-color: #4CAF50; background: white; box-shadow: 0 0 0 3px rgba(76,175,80,0.1); }
.input-group textarea { resize: vertical; min-height: 80px; font-family: 'Courier New', monospace; font-size: 13px; }
.button-container { margin-top: 20px; display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.calc-button { padding: 14px 35px; font-size: 16px; background: #4CAF50; color: white; border: none; border-radius: 6px; cursor: pointer; font-weight: bold; transition: all 0.3s ease; box-shadow: 0 2px 4px rgba(0,0,0,0.2); }
.calc-button:hover  { background: #45a049; transform: translateY(-1px); box-shadow: 0 4px 8px rgba(0,0,0,0.3); }
.calc-button:active { background: #3d8b40; transform: translateY(0); }
.calc-button.secondary { background: rgba(255,255,255,0.2); }
.calc-button.secondary:hover { background: rgba(255,255,255,0.3); transform: translateY(-1px); }
.help-text { margin-top: 15px; font-size: 14px; color: rgba(255,255,255,0.9); background: rgba(0,0,0,0.1); padding: 10px 15px; border-radius: 4px; }
.help-text strong { color: white; }
.result-section { background: white; border: 1px solid #e0e0e0; border-radius: 8px; margin-top: 20px; overflow: hidden; box-shadow: 0 2px 4px rgba(0,0,0,0.05); transition: all 0.3s ease; }
.result-section:hover { box-shadow: 0 4px 8px rgba(0,0,0,0.1); }
.section-header { background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%); color: white; padding: 15px 20px; font-size: 18px; font-weight: bold; }
.section-content { padding: 20px; background: #fafafa; }
.result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 15px; }
.data-row { display: flex; flex-direction: column; padding: 15px; background: white; border-radius: 6px; border-left: 4px solid #4CAF50; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.data-label { font-weight: bold; color: #555; font-size: 13px; margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.data-value { color: #4CAF50; font-family: 'Courier New', monospace; font-size: 20px; font-weight: bold; }
.data-value.small { font-size: 14px; }
.info-box { margin-top: 15px; padding: 15px; background: #e3f2fd; color: #1565c0; border-radius: 8px; border-left: 4px solid #2196F3; font-size: 14px; line-height: 1.6; }
table { width: 100%; border-collapse: collapse; }
th { background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%); color: white; padding: 10px; text-align: left; }
td { padding: 8px 10px; border-bottom: 1px solid #eee; font-size: 13px; }
tr:hover td { background: #f8fff8; }
@media (max-width: 768px) { .input-grid, .result-grid { grid-template-columns: 1fr; } .calc-header h2 { font-size: 22px; } .calc-container { padding: 10px; } }
/* Page-specific */
.uplink-badge { display: inline-block; padding: 3px 10px; border-radius: 12px; background: #4CAF50; color: white; font-size: 12px; font-weight: bold; }
.hash-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; }
</style>
<div class="calc-container">
<div class="calc-header">
<h2>ECMP فلو ہیش کیلکولیٹر</h2>
<p>یہ دیکھنے کے لیے 5-ٹپل درج کریں کہ ہر وینڈر کا ہیش الگورتھم کون سا اپ لنک منتخب کرتا ہے۔ ناہموار بوجھ کی تقسیم کی تشخیص کریں اور فلو پلیسمنٹ کی منصوبہ بندی کریں۔</p>
<div class="input-grid">
<div class="input-group">
<label>ماخذ آئی پی</label>
<input id="srcIp" placeholder="10.0.0.1" type="text" value="10.0.0.1"/>
</div>
<div class="input-group">
<label>منزل آئی پی</label>
<input id="dstIp" placeholder="10.0.1.1" type="text" value="10.0.1.1"/>
</div>
<div class="input-group">
<label>سورس پورٹ</label>
<input id="srcPort" max="65535" min="0" type="number" value="54321"/>
</div>
<div class="input-group">
<label>منزل پورٹ</label>
<input id="dstPort" max="65535" min="0" type="number" value="80"/>
</div>
<div class="input-group">
<label>پروٹوکول</label>
<select id="proto">
<option selected="" value="6">TCP (6)</option>
<option value="17">UDP (17)</option>
<option value="1">ICMP (1)</option>
<option value="50">ESP (50)</option>
</select>
</div>
<div class="input-group">
<label>اپ لنکس کی تعداد (ECMP راستے)</label>
<input id="numUplinks" max="64" min="2" type="number" value="4"/>
</div>
</div>
<div class="button-container">
<button class="calc-button" onclick="calcHash()">ہیش کا حساب لگائیں۔</button>
</div>
</div>
<div id="hashResult" style="display:none"></div>
<div class="result-section">
<div class="section-header">الگورتھم حوالہ</div>
<div class="section-content">
<table>
<tr><th>وینڈر / الگورتھم</th><th>ہیش ان پٹ</th><th>نوٹس</th></tr>
<tr><td>XOR (سسکو میراث)</td><td>src_ip XOR dst_ip XOR (src_port XOR dst_port)</td>
<td>ملتے جلتے IPs کے لیے تیز، ناقص تقسیم</td></tr>
<tr><td>CRC32 (Arista / Cisco NX-OS)</td><td>مکمل 5-ٹپل بائٹ سرنی کے طور پر</td>
<td>بہت بہتر تقسیم؛ جدید گیئر پر پہلے سے طے شدہ</td></tr>
<tr><td>FNV-1a (جونیپر)</td><td>مکمل 5-ٹپل بائٹ سرنی کے طور پر</td>
<td>تیز نان کرپٹو ہیش؛ اچھا برفانی تودہ اثر</td></tr>
</table>
</div>
</div>
</div>
<script>
function ipToU32(ip) {
    const parts = ip.trim().split('.').map(Number);
    if (parts.length !== 4 || parts.some(p => isNaN(p) || p < 0 || p > 255)) return null;
    return ((parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8) | parts[3]) >>> 0;
}

function toBytes(srcIp32, dstIp32, srcPort, dstPort, proto) {
    return [
        (srcIp32 >>> 24) & 0xff, (srcIp32 >>> 16) & 0xff,
        (srcIp32 >>> 8) & 0xff, srcIp32 & 0xff,
        (dstIp32 >>> 24) & 0xff, (dstIp32 >>> 16) & 0xff,
        (dstIp32 >>> 8) & 0xff, dstIp32 & 0xff,
        (srcPort >>> 8) & 0xff, srcPort & 0xff,
        (dstPort >>> 8) & 0xff, dstPort & 0xff,
        proto & 0xff
    ];
}

function hashXor(srcIp32, dstIp32, srcPort, dstPort) {
    return (srcIp32 ^ dstIp32 ^ (srcPort ^ dstPort)) >>> 0;
}

function hashCrc32(bytes) {
    let crc = 0xFFFFFFFF;
    const table = buildCrc32Table();
    for (const b of bytes) {
        crc = (table[(crc ^ b) & 0xff] ^ (crc >>> 8)) >>> 0;
    }
    return (crc ^ 0xFFFFFFFF) >>> 0;
}

let _crc32Table = null;
function buildCrc32Table() {
    if (_crc32Table) return _crc32Table;
    _crc32Table = new Uint32Array(256);
    for (let i = 0; i < 256; i++) {
        let c = i;
        for (let j = 0; j < 8; j++) {
            c = (c & 1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1);
        }
        _crc32Table[i] = c;
    }
    return _crc32Table;
}

function hashFnv1a(bytes) {
    // FNV-1a 32-bit: offset_basis=2166136261, prime=16777619
    let h = 2166136261;
    for (const b of bytes) {
        h = Math.imul(h ^ b, 16777619) >>> 0;
    }
    return h >>> 0;
}

function calcHash() {
    const srcIp = document.getElementById('srcIp').value;
    const dstIp = document.getElementById('dstIp').value;
    const srcPort = parseInt(document.getElementById('srcPort').value);
    const dstPort = parseInt(document.getElementById('dstPort').value);
    const proto = parseInt(document.getElementById('proto').value);
    const numUplinks = parseInt(document.getElementById('numUplinks').value);
    const div = document.getElementById('hashResult');
    div.style.display = 'block';

    const srcIp32 = ipToU32(srcIp);
    const dstIp32 = ipToU32(dstIp);
    if (srcIp32 === null || dstIp32 === null) {
        div.innerHTML = '<div class="result-section"><div class="section-header">Error</div><div class="section-content"><strong style="color:red">Invalid IP address. Use dotted-decimal notation (e.g. 10.0.0.1).</strong></div></div>';
        return;
    }
    if (isNaN(srcPort) || isNaN(dstPort) || srcPort < 0 || srcPort > 65535 || dstPort < 0 || dstPort > 65535) {
        div.innerHTML = '<div class="result-section"><div class="section-header">Error</div><div class="section-content"><strong style="color:red">Invalid port. Range: 0\u201365535.</strong></div></div>';
        return;
    }
    if (isNaN(numUplinks) || numUplinks < 2 || numUplinks > 64) {
        div.innerHTML = '<div class="result-section"><div class="section-header">Error</div><div class="section-content"><strong style="color:red">Invalid uplink count. Range: 2\u201364.</strong></div></div>';
        return;
    }

    const bytes = toBytes(srcIp32, dstIp32, srcPort, dstPort, proto);
    const xorHash = hashXor(srcIp32, dstIp32, srcPort, dstPort);
    const crcHash = hashCrc32(bytes);
    const fnvHash = hashFnv1a(bytes);

    const xorUplink = (xorHash % numUplinks) + 1;
    const crcUplink = (crcHash % numUplinks) + 1;
    const fnvUplink = (fnvHash % numUplinks) + 1;

    div.innerHTML = `<div class="result-section">
        <div class="section-header">Hash Result</div>
        <div class="section-content">
            <div style="margin-bottom: 20px; padding: 12px; background: white; border-radius: 6px; border-left: 4px solid #4CAF50;">
                <strong>5-tuple:</strong> ${srcIp}:${srcPort} \u2192 ${dstIp}:${dstPort} proto=${proto} | ${numUplinks} uplinks
            </div>
            <div class="hash-grid">
                <div class="data-row">
                    <div class="data-label">XOR (Cisco legacy)</div>
                    <div class="data-value">0x${xorHash.toString(16).toUpperCase().padStart(8,'0')}</div>
                    <span class="uplink-badge">Uplink ${xorUplink}</span>
                </div>
                <div class="data-row">
                    <div class="data-label">CRC32 (Arista / NX-OS)</div>
                    <div class="data-value">0x${crcHash.toString(16).toUpperCase().padStart(8,'0')}</div>
                    <span class="uplink-badge">Uplink ${crcUplink}</span>
                </div>
                <div class="data-row">
                    <div class="data-label">FNV-1a (Juniper)</div>
                    <div class="data-value">0x${fnvHash.toString(16).toUpperCase().padStart(8,'0')}</div>
                    <span class="uplink-badge">Uplink ${fnvUplink}</span>
                </div>
            </div>
        </div>
    </div>`;
}
</script>