<ul>
<li>outline</li>
</ul>
<blockquote>
NLB can be running on a availability zone, and cross-zone load balancing is off for default configuration.
</blockquote>
<ul>
<li>Cross-zone load balancing</li>
</ul>
<blockquote>
Disable : Zone based load balancing Enable : 1/n of backend resources dispite of Zone
</blockquote>
<ul>
<li>note</li>
</ul>
<blockquote>
Bascically, multi zone load balacing is best practice and in that case cross-zone load balancing must be enabled.
</blockquote>
<ul>
<li>reference</li>
</ul>
<blockquote>
<a target="_blank" href="https://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/how-elastic-load-balancing-works.html">https://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/how-elastic-load-balancing-works.html</a>
</blockquote>

* outline
    

> NLB can be running on a availability zone, and cross-zone load balancing is off for default configuration.

* Cross-zone load balancing
    

> Disable : Zone based load balancing  
> Enable : 1/n of backend resources dispite of Zone

* note
    

> Bascically, multi zone load balacing is best practice and in that case cross-zone load balancing must be enabled.

* reference
    

> [https://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/how-elastic-load-balancing-works.html](https://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/how-elastic-load-balancing-works.html)

NLB Cross-zone load balancing

AWS/Network Load Balancer

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