How does NetScaler load balance?
Log onto the NetScaler management GUI. Select Traffic Management > Load Balancing > Servers > Add and add each of the four StoreFront nodes to be load balanced. Use IP based server configuration and enter the server IP address for each StoreFront node.
What is a layer 7 load balancer?
Transmission Control Protocol (TCP) is the Layer 4 protocol for Hypertext Transfer Protocol (HTTP) traffic on the Internet. Layer 7 load balancers route network traffic in a much more sophisticated way than Layer 4 load balancers, particularly applicable to TCP‑based traffic such as HTTP.
What are the characteristics of Layer 7 load balancing?
Instead of merely forwarding traffic unread, a layer 7 load balancer terminates network traffic, performs decryption as needed, inspects messages, makes content-based routing decisions, initiates a new TCP connection to the appropriate upstream server, and writes the request to the server.
What is persistence in NetScaler?
With persistence configured, enabling the NetScaler to send any subsequent client requests to the selected server, the server can access state information for that client. If persistence is configured, it overrides the load balancing methods once the server has been selected.
What is Level 7 load balancing?
What is layer 7 load-balancing? A layer 7 load-balancer takes routing decision based on IPs, TCP or UDP ports or any information it can get from the application protocol (mainly HTTP). The layer 7 load-balancer acts as a proxy, which means it maintains two TCP connections: one with the client and one with the server.
What is difference between L4 and L7?
L4 load balancing offers traffic management of transactions at the network protocol layer (TCP/UDP). L7 load balancing works at the highest level of the OSI model. L7 bases its routing decisions on various characteristics of the HTTP/HTTPS header, the content of the message, the URL type, and information in cookies.
Is NetScaler a reverse proxy?
Citrix NetScaler can help companies arrange this using the reverse proxy methodology. Citrix NetScaler will be the proxy between the Internet and the company network. So basically, the servers can be in the LAN network and Citrix NetScaler will be placed in the DMZ zone. This will perform a secure connection.
What type of load balancer should you use?
Elastic Load Balancing supports the following types of load balancers: Application Load Balancers, Network Load Balancers, and Classic Load Balancers. Amazon ECS services can use these types of load balancer. Application Load Balancers are used to route HTTP/HTTPS (or Layer 7) traffic.
How does a load balancer work in NetScaler?
When you refresh the page, you can see that the NetScaler is doing its job and balancing the requests across both back-end web servers as shown in the following image: Use a load balancer to distribute the load across multiple web and application servers.
Why do we need layer 7 proxy in NetScaler?
The basic idea is that Layer 7 proxy allows us to have independent logical entry point for each Exchange web app which in turn allows us to independently switch them on and off based on their individual health rather than overall health of the server. Now, let us see how this general architecture can be translated into NetScaler configuration.
Why do we need a layer 4 load balancer?
Layer 4 load balancers can monitor the health of the server and helps to decide whether to take it out of the network or to continue to use it. Layer 4 load balancing is useful for various applications which still work on top of the TCP or UDP payloads.
How do I add a backend server to NetScaler?
To add the backend servers, perform the following steps: Connect to the management IP of your NetScaler. Select Login > Configuration > Traffic Management > Load Balancing > Servers. Click Add. Choose a naming convention for the first server and enter its IP address. This example uses `Web-01`. Click Create.