Intel manual Adding Secondary 7190s, Sample Network Topology

C H A P T E R 3 Intel® NetStructure™ 7190 Multi-Site Traffic Director User Guide

7190 (Primary)

host name: ns1.xyz-ex.com

IP address: 10.54.67.2

7xxx Load Balancer

IP address 10.54.67.4

name: lb1

service VIP 10.54.67.5 port 80 service VIP 10.54.67.6 port 80

generic load balancer

IP address 10.54.67.3

name: isvg1

service VIP 10.54.67.7 port 255 service VIP 10.54.67.8 port 255

Data Center 1

Netw ork Topology M ap of

ww w .xyz-ex.comData Center 2

generic load balancer
IP address 10.100.68.3
name: isvg2
service VIP 10.54.68.7	port	255
service VIP 10.54.68.8	port 255
7xxx Load Balancer
IP address 10.100.68.4
name: lb2
service VIP 10.100.68.5	port	80
service VIP 10.100.68.6	port	80
7190 (Secondary & Peer)
host name: ns2.xyz-ex.com
IP address: 10.100.68.2

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.comby becoming a sec- ondary of the 7190 at 10.54.67.2. From the CLI on the proposed second 7190, execute the command:

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