Redundancy. ◦ Multiple components able to perform the same tasks. ▻ Clustering (Database/Storage). ◦ MSCS (SQL Server). ◦ Oracle RAC. ▻ Load Balancing. This manual applies to version of BIG-IP® Local Traffic ManagerTM, BIG-IP® Load Balancer. LimitedTM, and BIG-IP® SSL AcceleratorTM. Legal Notices. - Explain the effect of LTM device configuration parameters on load balancing reports to a PDF or CSV file, or send the reports to one or more email.
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Cisco UCS Director F5 BIG-IP Management Guide, Release -Managing the F5 BIG-IP Load Balancer. BIG IP F5 LOAD BALANCER. Steps to create Portal Web Server clustering using F5 Load Balancer. Prerequisites: 1) BPM Portal should be installed. 2) F5 Load. F5, BIG-IP, 3-DNS, SEE-IT, and GLOBAL-SITE are registered trademarks of F5 .. Configuring virtual servers for VPN and router load balancing
Requirements Before performing the procedures described in this appendix, you must have performed the following: Installed and configured your WebLogic Server environment. This includes creating and configuring clusters and managed servers. Virtual Server IPs and Pools On each local load balancer you must configure two virtual server IPs as well as a multi-layer pool and a failover trigger pool. This diagram shows individual managed servers, but this could also represent a clustered configuration as well.
Each local load balancer contains a virtual server IP that references a multilayer pool. The multilayer pool references each of the local WebLogic Server IP addresses and host names and the virtual server of the failover trigger pool.
The failover trigger is used to indicate that a site is down. This triggers failover to the other local load balancer. The following sections describe how to configure multi-layer and failover trigger pools. Then, create a new virtual server that specifies this pool. Add a pool name Add all the WLS server host:port combinations to be load balanced The default priority may used.
Session persistence does not need to be configured. You should specify a port that by convention would be a failover-trigger port, for example Specify an IP address for the Virtual Server, for example The failover-trigger virtual server must be a lower priority than the WLS Servers.
By assigning a lower priority, the failover-trigger virtual server will never receive client requests unless all the WLS servers have failed. Session persistence should be configured also.
Clients send http requests to the global load balancer, which uses built in health monitors to direct the web requests to the optimal server based on the chosen method of load balancing.
Load balancing is the most straightforward method of scaling out an application server infrastructure. As application demand increases, new servers can be easily added to the resource pool, and the load balancer will immediately begin sending traffic to the new server.
Core load balancing capabilities include:. When one application server becomes unavailable, the load balancer directs all new application requests to other available servers in the pool.
To handle more advanced application delivery requirements, an application delivery controller ADC is used to improve the performance, security and resiliency of applications delivered to the web. An ADC is not only a load balancer, but a platform for delivering networks, applications and mobile services in the fastest, safest and most consistent manner, regardless of where, when and how they are accessed.
Load balancing uses various algorithms, called load balancing methods, to define the criteria that the ADC appliance uses to select the service to which to redirect each client request.
Different load balancing algorithms use different criteria. Traffic volumes are increasing and applications are becoming more complex. Load balancers provide the bedrock for building flexible networks that meet evolving demands by improving performance and security for many types of traffic and services, including applications.
Citrix ADC is an industry leading application delivery controller that delivers business applications to any device and any location with unmatched security, superior L load balancing, reliable GSLB, and percent uptime. Related terms: All Rights Reserved. What is load balancing? Watch the Webinar: Transitioning Load Balancing to the Cloud This webinar from Packet Pushers and Citrix focuses on key challenges faced by the enterprise when transitioning their load balancers to the cloud.
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Core load balancing capabilities include: Layer 4 L4 load balancing - the ability to direct traffic based on data from network and transport layer protocols, such as IP address and TCP port Layer 7 L7 load balancing and content switching — the ability to make routing decisions based on application layer data and attributes, such as HTTP header, uniform resource identifier, SSL session ID and HTML form data Global server load balancing GSLB - extends the core L4 and L7 capabilities so that they are applicable across geographically distributed server farms How do load balancers work?
Load balancing algorithms and methods Load balancing uses various algorithms, called load balancing methods, to define the criteria that the ADC appliance uses to select the service to which to redirect each client request.