XML based content routing

Okay, try this:

XML profile configuration (namespace mapping is not required because the node you're looking for is not behind a namespace)

ltm profile xml /Common/xml-test-2 {
    app-service none
    defaults-from /Common/xml
    multiple-query-matches disabled
    namespace-mappings none
    xpath-queries { //network-operator-code }
}

iRule:

when CLIENT_ACCEPTED {
    set default_pool [LB::server pool]
}
when XML_CONTENT_BASED_ROUTING {
    switch $XML_values(0) {
        "12345" {
            log local0. "send to node-1"
            node 10.70.0.2 80
        }
        "67890" {
            log local0. "send to node-2"
            node 10.70.0.3 80
        }
        default {
            log local0. "send to pool"
            pool $default_pool
        }
    }   
}