HP Multi-Site Traffic Director sa9200 - Manual (Page 15)

C H A P T E R 2 Multi-Site Traffic Management Without HP Traffic Directors
9
Multi-Site
Traffic
Management
Without HP
Traffic
Directors The SA9200 can support data centers, whether or not they have an HP
Traffic Director. Without these HP products, the SA9200 can monitor
site service availability by using an ISV method:
• Ping (ICMP)
• TCP Open probe
• HTTP URL probe
Typical
Configuration The SA9200 can be used with a wide variety of topologies but a basic
example of a SA9200 configuration might consist of two SA9200s
and four HP SA8200s (one SA9200 at each location that the site is
distributed across, and two SA8200s or two SA8220s in serial fail-
over mode for each location). For illustrative purposes, these devices
are configured to balance www.mstd-ex.com. Because the SA9200
does not resolve records aside from hostnames (e.g., no MX records
or reverse DNS lookups), your existing DNS server should remain
authoritative for the domain, mstd-ex.com. A new zone, zone.mstd-
ex.com, must be created and your existing DNS server must delegate
authority for this zone to all of the SA9200s. An alias,
www.zone.mstd-ex.com is created for www.mstd-ex.com. This zone
and alias are transparent to users connecting to your site. They still
requests www.mstd-ex.com and are referred to the optimal site by the
SA9200.
SA9200 Overview - A Basic Configuration
Internet
S A9200 secondary
servers
S A9200 prim ary
S A8200 or SA8220s
servers
C lient
Los A ngeles location Chicago location
S A8200 or S A8220s