Tuesday 22 October 2013

Introduction to F5 Load Balancer

Introduction:
F5 Networks best known for its BIG-IP products.

1.Set of application delivery products
2.load balancing
3.link traffic management
4.special handling
5.augmented security
6.contains multiple components




1.BIG-IP Local Traffic Management or LTM

2. BIG-IP Global Traffic Management or GTM :
GTM provides wide area traffic management and high availability of IP application and services running across multiple data centers

3. Linkcontroller : Linkcontroller monitors availability and performance of multiple WAN connections (or Links) and then intelligently manages traffics flows through those links, provide fault torrent, Optimized internet access.

4. BIG-IP Application security manager or ASM :
  ASM Provides comprehensive security that protects IP-Based application and services against known and  unknown external threats at the network and application layer.

5. BIG-IP Web accelerator:
  Web accelerator assists web applications for mobile workers by coaching content and working with the client browser session to improve performance.

6. BIG-IP Enterprise manager:
  And finally, BIG-IP enterprise manager provides a single, centralized management & operational interface  for the other F5 devices.

Question: What does BIG-IP LTM actually do?

Answer: BIG-IP LTM Manages yours network by monitoring status of each server and load balancing the traffic.

In this diagram, BIG-IP Lies between your server & the internet, it receives incoming traffic and most cases sents outgoing taffic.  

The LTM balances the load by sending traffic to different servers.

1.Monitors servers status
2.Load balances Traffic

      Users
   |
     Internet
         |
    BIG-IP LTM
         |
    Servers 


If a server is unavailable LTM stops sending traffic to it. Unlike traditional load balancers that are reserved for web-only applications BIG-IP LTM can manages traffic for all ip based applications and web servers.

The LTM Examines values in the header or pay load of incoming packet and based on its value it intercepts transforms and directs application and web services requests.

One of the best feature of LTM is handling of SSL Traffic. The BIG-IP LTM can off load this processing intensive function from the application servers, greatly increasing application performance.

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