Internet Direct (Indy) Version 9.0.2 Beta
TIdUDPBase.BufferSize
Specifies the largest UDP packet size.

property BufferSize: Integer;
Description
BufferSize is an Integer property used to specify the largest UDP packet that can be sent or received using Binding. The default value for BufferSize is 8192, and is assigned in Create.

An EIdSocketError exception will be raised if ReceiveString encounters a packet larger than BufferSize.