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Rules

BIG-IP® Reference Guide 4-55

Using the one of operator instead, you can cause BIG-IP to load balance all

incoming AOL connections to the pool aol_pool, if the value of the

client_addr variable is a member of the class AOL. Figure 4.26 shows this

type of rule. In this case, the one of operator indicates that the variable

client_addr is actually a list of values (that is, a class).

Figure 4.26 A rule based on the one of operator

Note that an expression such as client_addr equals one of aol is true if the

expression is true with at least one specific value in the class.

For another example of a rule using the one of operator, see Additional rule

examples, on page 4-65.

Class types

The one of operator for rules supports three specific types of classes. They

are:

• Strings - The following command creates a string class:

b class my_class { \".gif\" }

Note: This example shows the use of escape characters for the quotation

marks.

Figure 4.27 shows the resulting string type of class.

Figure 4.27 An example of a string type of class

• Numerics - The following command creates a numeric type of class:

b class my_protos { 27 38 93 }

rule my_rule {

if (client_addr equals one of aol) {

use (aol_pool)

}

else {

use (all_pool)

}

class images {

".gif"

}

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