Can we load load balance between one lac ssg and 4 L2TP tunnel in huawei
// L2TP load balancing can be configured based on two L2TP tunnels.
is there loopback address limit?
// For L2TP LNS user forwarding, soft loopback can be used only when the outbound interface is configured with a TM. Otherwise, hard loopback can be configured using the forward-mode {through | loopback} l2tp command.
To collect all tunnels in one lns group is ok ?
// An LNS group can support multiple tunnels.
For details, see the configuration method in the link
https://support.huawei.com/hedex/hdx.do?docid=EDOC1100196170&id=EN-US_TASK_0172374291&lang=en