<header>
        ...
    </header>
    <nav class="subnav">
        <ul class="nav">
            <li class="nav-item">
                <a class="nav-link active" href="#">Dashboard</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Management</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Cloud</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Tenants</a>
            </li>
        </ul>
    </nav>