Specifications

Chapter 1: Overview
6 Equalizer Installation and Administration Guide
geographic cluster to determine the site that is best able to process the request and then returns the
address of the selected site.
For example, the geographic cluster www.coyotepoint.com might have three sites (see Figure
2): one on the east coast of the U.S., one on the west coast of the U.S., and one in Europe. The
servers at each site are connected to an Equalizer with the Envoy add-on installed.
Figure 2 Three‐sitegeographicclusterconfiguration
When a client in California attempts to connect to coyotepoint.com:
1. The client queries the its local name server to resolve the domain name (see Figure 3).
Figure 3 ClientqueriesitslocalDNSforcoyotepoint.com
Envoy Site B
(West Coast USA)
Envoy Site A
(East Coast USA)
Internet
Envoy Site C
(Europe)
Envoy Site B
(West Coast USA)
Envoy Site A
(East Coast USA)
Internet
Envoy Site C
(Europe)
Client
(California, USA)
Client’s
Local DNS
Authoritative
DNS
for
coyotepoint.com