How does the session tracking module work?
The default session tracking module shipped with the sources (lnlb_mod_default) does a simple and lightweight source IP based tracking. Once a remote IP is mapped to a node, all subsequent datagrams sent to the cluster will be delivered to the same node (except if node has a fault, in this case the connection will be reassigned). If this is not enough for you, you can redesign the default session tracking module, or add a new module that will handle tracking for a specific transport protocol (e.g. TCP, UDP,…).
