Installation guide

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Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance
OL-26645-02
Chapter 7 Configuring Stickiness
Stickiness Overview
Figure 7-3 Buddy Sticky Groups: Many-to-One Association
The buddy sticky groups blue and red divide the first-tier real servers into groups and then sticks each
of these groups to a specific second-tier real server.
In this example, when the ACE load balances clients to either real server 1nx1 or 1nx2 in the server farm
web, the clients are directed only to real server db1 when they are ready to move to the server farm app.
Notice also that clients that the ACE load balances to 1nx3 and 1nx4 are directed only to real server db2
when they are ready to move to the server farm app.
Server Farm
Server Farm
Buddy Member Group Real Server
Real Server
Buddy Group
web (first tier) alpha 1nx1:192.168.1.11:80 blue
1nx2:192.168.1.12:80 blue
1nx3:192.168.1.13:80 red
1nx4:192.168.1.14:80 red
app (second tier) alpha db1:192.168.1.21:123 blue
db1:192.168.1.22:123 red
Server Farm
web
(alpha)
Server Farm
app
(alpha)
1nx3
192.168.1.13:80
1nx4
192.168.1.14:80
db2
192.168.1.22:123
1nx2
192.168.1.12:80
1nx1
192.168.1.11:80
db1
192.168.1.21:123
blue
red
First Tier Servers Second Tier Servers
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