Elastic Load Balancing | Network Load Balancer Flashcards
How does the LCU billing work with different certificate types and key sizes?
Network Load Balancer
Elastic Load Balancing | Compute
Certificate key size affects only the number of new connections per second in the LCU computation for billing.
The following table lists the value of this dimension for different key sizes for RSA and ECDSA certificates.
Can I create a TCP (Layer 4) listener for my Network Load Balancer?
Network Load Balancer
Elastic Load Balancing | Compute
Yes. Network Load Balancers support only TCP (Layer 4) listeners.
What are the key features available with the Network Load Balancer?
Network Load Balancer
Elastic Load Balancing | Compute
Network Load Balancer provides TCP (Layer 4) load balancing. It is architected to handle millions of requests/sec, sudden volatile traffic patterns and provides extremely low latencies. In addition Network Load Balancer also preserves the source IP of the clients, provides stable IP support and Zonal isolation. It also supports long-running connections that are very useful for WebSocket type applications.
How does Network Load Balancer compare to what I get with the TCP listener on a Classic Load Balancer?
Network Load Balancer
Elastic Load Balancing | Compute
Network Load Balancer preserves the source IP of the client which in the Classic Load Balancer is not preserved. Customers can use proxy protocol with Classic Load Balancer to get the source IP. Network Load Balancer automatically provides a static IP per Availability Zone to the load balancer and also enables assigning an Elastic IP to the load balancer per Availability Zone. This is not supported with Classic Load Balancer. Classic Load Balancer provides SSL termination that is not available with Network Load Balancer.
Can I migrate to Network Load Balancer from Classic Load Balancer?
Network Load Balancer
Elastic Load Balancing | Compute
Yes. You can migrate to Network Load Balancer from Classic Load Balancer using one of the options listed in this document.
Are there limits on the resources for my Network Load Balancer?
Network Load Balancer
Elastic Load Balancing | Compute
Yes, please refer to Network Load Balancer limits documentation for more information.
Can I use the AWS Management Console to set up my Network Load Balancer?
Network Load Balancer
Elastic Load Balancing | Compute
Yes, you can use the AWS Management Console, AWS CLI, or the API to set up a Network Load Balancer.
Can I use the existing API for Classic Load Balancers for my Network Load Balancers?
Network Load Balancer
Elastic Load Balancing | Compute
No. To create a Classic Load Balancer, use the 2012-06-01 API. To create a Network Load Balancer or an Application Load Balancer, use the 2015-12-01 API.
Can I create my Network Load Balancer in a single Availability Zone?
Network Load Balancer
Elastic Load Balancing | Compute
Yes, you can create your Network Load Balancer in a single availability zone by providing a single subnet when you create the load balancer.
Does Network Load Balancer support DNS regional and zonal fail-over?
Network Load Balancer
Elastic Load Balancing | Compute
Yes, you can use Amazon Route 53 health checking and DNS failover features to enhance the availability of the applications running behind Network Load Balancers. Using Route 53 DNS failover, you can run applications in multiple AWS Availability zones and designate alternate load balancers for failover across regions. In the event that you have your Network Load Balancer configured for multi-AZ, if there are no healthy EC2 instances registered with the load balancer for that Availability Zone or if the load balancer nodes in a given zone are unhealthy, then R-53 will fail away to alternate load balancer nodes in other healthy availability zones.
Can I have a Network Load Balancer with a mix of ELB-provided IPs and Elastic IPs or assigned private IPs?
Network Load Balancer
Elastic Load Balancing | Compute
No. A Network Load Balancer’s addresses must be completely controlled by you, or completely controlled by ELB. This is to ensure that when using Elastic IPs with a Network Load Balancer, all addresses known to your clients do not change.
Can I assign more than one EIP to my Network Load Balancer in each subnet?
Network Load Balancer
Elastic Load Balancing | Compute
No. For each associated subnet that a Network Load Balancer is in, the Network Load Balancer can only support a single public/internet facing IP address
If I remove/delete a Network Load Balancer what will happen to the Elastic IP addresses that were associated with it?
Network Load Balancer
Elastic Load Balancing | Compute
The Elastic IP Addresses that were associated with your load balancer will be returned to your allocated pool and made available for future use.
Does Network Load Balancer support internal load balancers?
Network Load Balancer
Elastic Load Balancing | Compute
Network Load Balancer can be set-up as an internet-facing load balancer or an internal load balancer similar to what is possible with Application Load Balancer and Classic Load Balancer.
Can the internal Network Load balancer support more than one private IP in each subnet?
Network Load Balancer
Elastic Load Balancing | Compute
No. For each associated subnet that a load balancer is in, the Network Load Balancer can only support a single private IP.