Seção principal do Bootsrap preenche toda a altura com marinho
<div class="container-fluid h-100 d-flex flex-column">
<nav class="navbar navbar-expand-sm s-navbar">
<a class="brand navbar-brand" href="/">Brand</a>
<button class="navbar-toggler s-btn-hamburger order-first s-color-icons" aria-expanded="true" aria-controls="navbar-test" aria-label="Toggle navigation" type="button" data-target="#navbar-test" data-toggle="collapse">
<span class="navbar-toggler-icon k-icon k-icon-md k-i-hamburger"></span>
</button>
<div class="navbar-collapse s-menu-content collapse show" id="navbar-test">
<ul class="navbar-nav mr-auto">
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" id="dropdown1" aria-expanded="false" aria-haspopup="true" data-toggle="dropdown">Menu Item</a>
<div class="dropdown-menu" aria-labelledby="dropdown1">
<a class="dropdown-item" href="/Device">Sub menu</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="/Test">Test</a>
</li>
</ul>
</div>
</nav>
<div class="row flex-fill">
<main class="col" style="background-color: yellow"></main>
</div>
</div>
Lonely Lyrebird