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C H A P T E R 2 Typical Configuration
9
Multi-Site Traffic Management Without
NetStructure Load Balancers
The 7190 can support data centers, whether or not they have an Intel
Load Balancer. Without these Intel products, the 7190 can monitor
site service availability by using an ISV method:
• Ping (ICMP)
• TCP Open probe
• HTTP URL probe
Typical
Configuration
The 7190 can be used with a wide variety of topologies but a basic
example of a 7190 configuration might consist of two 7190s and four
NetStructure 7140s (one 7190 at each location that the site is
distributed across, and two 7140s in serial fail-over mode for each
location). For illustrative purposes, these devices are configured to
balance www.mstd-ex.com. Because the 7190 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 7190s. 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 7190.
7190 Overview - A Basic Configuration
Intel
Internet
7190 secondary
7180s
servers
7190 primary
7180s
servers
Client
Los Angeles location Chicago location