Unlike the other transport protocols, TUNNEL doesn't bind any configured additional_data to the local IpAddress once it learns what it is. This prevents a TUNNEL-based channel from working with a JBoss AS HAPartition.

Fix is to add

if(additional_data != null && local_addr instanceof IpAddress)
((IpAddress)local_addr).setAdditionalData(additional_data);

to TUNNEL.start() after the local_addr is assigned.