Hi, I'm having a very basic issue: when sending a large number of UDP messages in short succession via boost::asio, even to localhost, after a few hundred messages, there seems to be a serious loss. please see a sample code here: http://pastebin.com/Bq0DnkeG the output I get is the following: $ ./async_asio 0 1 2 3 ... 939 940 941 942 943 944 958 983 1013 1049 1093 1151 1234 1363 1576 1943 b sent 2000 messages a received 955 messages so, basically while 2000 messages were sent over, only up to 944 were received so that all of them are, an then there are only sporadic messages received afterwards - a total of 955. while I understand UDP is not guaranteed to be sent over, such a level of unreliability to the localhost interface seems to be quite troublesome.. what am I doing wrong? Akos