Irule to Load Balance traffic based on group of IP's

There are a few ways to deal with this, but one example is to use an iRule data group and match the specific source IP and make a decision based on that. I would set this up using two pools, a data group and a rule as per this example:

Pool1 - Server 1 and 2 Pool2 - Server 3

iRule Data group (String type)

Name: Pool1IPs

Add the IP Addresses to route to Pool1

iRule to direct the traffic:

when HTTP_REQUEST {
    if {[class match [IP::client_addr] equals Pool1IPs} {
        Pool Pool1
    } else {
        Pool Pool2
    }
}

Hello,

You can use list directly in the irule as shown in the example below :

when RULE_INIT {
    set static::ipaddress ["10.1.1.1" "10.1.1.2" "10.1.1.3"]
}

when HTTP_REQUEST {
    if { [lsearch -glob $static::ipaddress "[IP::client_addr]"] != -1 } {
        pool mypool
    } else {
        pool default_pool
    }
}