Configuring local fragment pre-drop

If the packet size is bigger than the MTU of the egress interface, the packet is fragmented into local fragments. If the first fragment is dropped, the subsequent fragments become invalid fragments, and it is insignificant to process and transmit these invalid fragments.

With local fragment pre-drop, if the first fragment of a packet is dropped by the QoS module, the subsequent fragments will be dropped directly without undergoing QoS processing. The local fragment pre-drop function improves the local fragment processing and transmitting efficiency, and reduces subsequent invalid fragments' occupation of system resources and network bandwidth.

Local fragment pre-drop is mutually exclusive with matching fragments by fragment attributes or size.

Local fragment pre-drop applies to IPv4 and IPv6 local fragments.