direct traffic based on information from the XML request

try something like that:

when CLIENT_ACCEPTED { 
    set default_pool [LB::server pool]
}

when HTTP_REQUEST {
    set msisdn [URI::decode [URI::query [HTTP::uri] msisdn]]
    if {[string length $msisdn] } {
        switch -glob $msisdn {
            "*0" { set ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980}}
            "*1" { set ports {8180 8080 8380 8280 8580 8480 8780 8680 8980 8880}}
            "*2" { set ports {8280 8380 8480 8580 8680 8780 8880 8980 8080 8180}}
            "*3" { set ports {8380 8280 8580 8480 8780 8680 8980 8880 8180 8080}}
            "*4" { set ports {8480 8580 8680 8780 8880 8980 8080 8180 8280 8380}}
            "*5" { set ports {8580 8480 8780 8680 8980 8880 8180 8080 8380 8280}}
            "*6" { set ports {8680 8780 8880 8980 8080 8180 8280 8380 8480 8580}}
            "*7" { set ports {8780 8680 8980 8880 8180 8080 8380 8280 8580 8480}}
            "*8" { set ports {8880 8980 8080 8180 8280 8380 8480 8580 8680 8780}}
            "*9" { set ports {8980 8880 8080 8180 8280 8380 8480 8580 8680 8780}}
            default { set ports {8080 8180 8080 8180 8480 8580 8680 8780 8880 8980}}
        }  
    } else {set ports {8080 8180 8280 8380 8480 8580 8680 8780 8880 8980}}
    foreach port $ports {
        if { [LB::status pool $default_pool member 172.24.248.85 $port] eq "up" } {
            pool $default_pool member 172.24.248.85  $port
            break
        }
    }
}