Whether the Ethernet port supports Pause frame flow control. Options: 1. true(1) -support 2. false(2) -not support When traffic of an Ethernet port is heavy, use this leaf to control traffic to prevent network congestion, which may cause the loss of data packets. After traffic control of an Ethernet port is enabled, when traffic of EE port exceeds 1 Gbit/s and traffic of FE port exceeds 100 Mbit/s, the device sends PAUSE frames to inform the remote PC to reduce traffic so as to reduce the packet loss rate. The control function requires the supports from both the MA5600T and the peer device. If the peer device supports traffic control, enable the traffic control of the MA5600T; if the peer device does not support the traffic control, disable the traffic control of the MA5600T.