HP SuperStack 3 Load Balancer Appliance Supported Algorithms Description Destination, Round Robin

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Creating a Cache Profile (Optional)

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6Choose a algorithm. The default algorithm is Round-robin. Table 10 describes the available algorithms.

Table 10 Supported Algorithms and Description

Supported Algorithms	Description

Destination	The Destination IP address of the client's packets is
	hashed and used as an index to an array of active
	servers bound to the service. This is appropriate for
	redirection of sessions between a smaller set of clients
	and a larger set of servers, for example, local users of
	the extraNet, or the World-Wide Web
Round Robin	Each new connection is assigned to the next server in
	the list. This distributes connections evenly between
	the servers.
Weighted Round Robin	Similar to Round Robin, except that N consecutive new
	connections are assigned to a server before selecting
	the next server in the list, where N is the weight
	assigned to the server. Servers with higher
	performance or capacity should be assigned higher
	weight.
	The weight assigned to the server is assigned using the
	Assign caches to services (Advanced)... window. A
	weight field is provided.
Least Connections	Each new connection is assigned to the server having
	the fewest number of open connections. If several
	servers have the same low number of open
	connections, then the new connection is sent to the
	server that was least recently sent a new connection
Weighted Least	Similar to Least Connections, except that N consecutive
Connections	new connections are assigned to a server before next
	selecting the server with the least number of open
	connections, where N is the weight assigned to the
	server

7Leave Sticky Mode field set to Off.

8The default health check is Ping, click Next. Other available health checks are:

■Ping — Server Load Balancer periodically pings each server using ICMP Echo. The number of retries are configurable. If successive ping attempts fail, the server is marked as down and is removed from the pool of available servers.

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Contents SuperStack 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Contents Setting UP for Management Technical Specifications and PIN-OUTS 3Com Knowledgebase Web Services About this Guide Convention Description ConventionsIcon Description Documentation Related DocumentationProduct RegistrationAbout this Guide Balancer 12 10/100 LAN Ports Feature Server Load Balancer Plus MemoryFeature Server Load Balancer Plus Algorithms Server Load BalancerBalancer Front View Detail Server Load1000BASE-SX Port Status LEDs Color Indicates Power/Self Test LEDPower LED 10/100BASE-T Port Status LEDsBalancer Rear View Detail Power SocketDisconnecting the power cord Advanced Redundant Power System outputType 3 Power Module, read the Safety Information section Documentation shipped with the power systemInstalling the Server Load Installing the Server Load Balancer Server Load Balancer if they have been fitted Rack-mountingTop of Each Other ChoosingCorrect Cables Placing Units OnSequence Power-upPowered-up and ready for operation On powering-up, the Power/Self Test LED lights yellow Problem Suggested SolutionSetting UP for Management Address Methods Managing Server Load BalancerAssigning an IP SEC Setting UP for Management Interface Security Warning Window Web Interface pages appears To install the plug-in, complete the following stepsAfter a management session Network Password window appearsInterfacesteps Navigation Tree Using the Web InterfaceWeb interface is made up of three areas BannerDevice Summary Summary information is displayed in a two tablesSystem Summary Unit Hotspot Port HotspotsColor Action Control ButtonsLogical View Button Action Help View Specifying Setting up SnmpTrap Community String field is defaulted to public ManagementLoad Balancer UpgradingOperating Software Working with the WEB Interface Server Load Balancing Approximately double the performance of Server B ConfigurationBalancing ExampleConfiguring for Non-redundant Server Load Balancing Click Next. The Getting Started Password page appears Configuring Redundant Load Balancing Balancer 1 and is configured for the same serviceRedundant Server Load Balancer for active-passive redundancy Configuring forActive-Passive RedundancyEnter 10.20.30.56 in the Device B IP Address field Load Balancer for active-active redundancy Active-ActiveClick Next. The Getting Started IP Settings page appears Enter 26 in the Virtual router ID B field SettingSettings Enter 25 in the Virtual router ID a fieldConfiguring Redundant Server Load Balancing Redirection Cache Redirection Configuration Example Non-redundant ConfigurationDefining a Cache SubnetClick Next Click Finish. Your cache subnet has been added Been created ServicesAdding a Cache Assigning Caches toEnter a descriptive name, such as Cache2, in the Name field StepsRound Robin Weighted Round RobinWeighted Least Supported Algorithms Description DestinationThis sets the number of retries a health check is attempted TimeoutRetries field Balancing Click Finish. Your server subnet has been added Click Next. The Server Subnet Define Subnet page appearsChanging Lan Port Roles Adding a Server Highlight Http and click the Next Click Continue with Advanced SettingsEnter a descriptive name, such as Web, in the Name field Showing Status To ServiceServer load balancing service Assigning ServersEnter 8080 in the Server port field Click OK Click Server AssignmentsClick on the cell next to Server A. a pop-up menu appears To add a user group, complete the following steps Adding a UserGroup This user groupClick Permissions To assign permissions, complete the following stepsResponse Supported Algorithms Description Round RobinQuickest Last Response Quickest AverageThis sets the number of retries in a health check period Filter Description Select the attack filters you wish to enable and click OKMitigation FiltersSelect Security User Modifying Admin AccessModifying Monitor Access Configuring for Load Balancing Safety Information Information Important SafetyImportant Safety Information Hub plus étroites ’information deSécurité Importante Personnel qualifié’information de Sécurité Importante Europe Wichtige Sicherheitsinformat ionenAchtung Faseroptikanschlüsse Optische Sicherheit Appendix a Safety Information Balancer and the Server Load Balancer Plus SpecificationsPIN -OUTS Pin to 9-pin Console Port CablePC-AT Serial Pin to RS232 25-pin3Com ServicesOnline Technical Username anonymous Europe, Middle East Africa Asia, Pacific RimNorth America Country Telephone Number Fax Number Appendix C Technical Support Numbers IndexSpecifications, system 83 summary view Summary view 32 World Wide Web WWW Index Superstack 3 Server Load Balancer 3C16120 Obtaining Warranty Service Warranties Exclusive Other Services Regulatory Notices

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