Hp Multi-Site Traffic Director sa9200 Manual de usuario descargar pdf (Pagina 46)

C H A P T E R 4 HP Multi-Site Traffic Director Server Appliance SA9200 User Guide

• Flash Response Mode

• Mixture of Brokered and Non-brokered Sites

• Different Site Combinations for Each Hostname

• Different Balancing Methods for Each Hostname

• Associating Services with Hostnames

Procedures

NOTE: HP Traffic

Director refers to either

an HP Traffic Director

Server Appliance, Models

SA7200 and SA7220; or

HP e-Commerce Traffic

Director Server

Appliance, Models

SA8200 and SA8220

Step 1. Create agents for each of the sites brokered by HP

Traffic Directors and associate their services.

For this example, there is one existing site used for only one

division’s Web site. This site enforces the fact that not all sites have

to be identical.

The SA9200-to-site association is also done at this time since at least

one Web site uses Flash Response Mode. The HP Traffic Directors

are used as the backup Flash source.

In this scenario, only two of the four sites SA9200s are actually

required. If Flash Response Mode is used, the Traffic Directors can

broadcast the DNS responses under the direction of the SA9200s. The

Traffic Directors may have an impact on performance, so it is

recommended that a SA9200 be placed at each site and the site

Traffic Director designated as a backup Flash source. This prevents

the SA9200 from being a single source of failure without impacting

the performance of the Traffic Director except upon a SA9200

failure.

Since redundancy is a key issue, all of the Traffic Directors are

deployed in pairs with serial failover enabled. This means that each

Traffic Director actually has three IP addresses. The IP address that

is used to communicate with the SA9200 is the Online Outside IP

Address (management address). This makes the failure of a Traffic

Director transparent to the SA9200 except for a momentary loss of

connection that provides the Traffic Director metrics.

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Hp Multi-Site Traffic Director sa9200 Manual de usuario Pagina 46