The rpc_tcp state engine is used for RPC protocols that use the TCP protocol. Normally, a service definition for such a protocol requires both an rpc_tcp and pmap_tcp state engine entry. The discriminator for the rpc_tcp state engine is the RPC program number for the service.
The rpc_tcp state engine has one parameter:
Idle session lifetime in seconds - Specifies the lifetime of an idle TCP RCP session in seconds (default = 86400 seconds or 24 hours)