Flags specifying how PRVT-LDP Session Controller should behave in situations either where the interpretation of strict conformance is debatable, or where strictly conformant behavior contradicts the general IETF principle of being liberal on receipt. maxPduLen If set, this flag means that PRVT-LDP should abort session initialization if the peer (in the passive role) proposes a max PDU length that is larger than PRVT-LDP's proposed value. The interpretation here is that the passive peer's value should be the already negotiated value, not its raw value.