C H A P T E R 3 Intel® NetStructure™ 7190 Multi-Site Traffic Director User Guide
18
Sample Network Topology
Adding Secondary 7190(s)Now that the primary 7190 is up and running, the additional 7190s
can be easily added by configuring them as secondary 7190s. They
receive all their configuration information from the designated
primary 7190 through the Global Sync process, which automatically
transfers the primary 7190 configuration to any secondary 7190s.
Similar to a typical DNS server, all 7190s are treated as equals by
other DNS servers. The terms of primary and secondary only refers
to where a 7190 gets its new configuration information. The 7190
only allows the configuration to be changed on a primary 7190.
Secondaries get their configuration from their designated primary
7190 and store a copy of the received configuration locally. Should a
secondary be unable to contact a primary it functions normally using
its stored configuration. All 7190s have the same picture of the
current Agent metrics and are equally capable of responding. Should
one fail the existing DNS protocol automatically routes requests to
the non-failed 7190s.
The theoretical secondary ns2.xyz-ex.com (IP 10.100.68.2) can re-
solve requests for www.somedomain.xyz-ex.com by becoming a sec-
ondary of the 7190 at 10.54.67.2. From the CLI on the proposed
second 7190, execute the command:
7190 (Primary)
7190 (Secondary & Peer)
Network Topology
Map of
www .xyz -ex .co m
host name: ns1.xyz-ex.com
IP address: 10.54.67.2
host name: ns2.xyz-ex.com
IP address: 10.100.68.2
service VIP 10.54.67.5 port 80
service VIP 10.54.67.6 port 80
IP address 10.54.67.4
name: lb1
generic load balancer
IP address 10.100.68.3
name: isvg2
7xxx Load Balancer
7xxx Load Balancer
generic load balancer
service VIP 10.54.67.7 port 255
service VIP 10.54.67.8 port 255
IP address 10.54.67.3
name: isvg1
service VIP 10.54.68.7 port 255
service VIP 10.54.68.8 port 255
Data Center 1
Data Center 2
IP address 10.100.68.4
name: lb2
service VIP 10.100.68.5 port 80
service VIP 10.100.68.6 port 80