What would cause UDP packets to be dropped when being sent to localhost?

Question

I\'m sending very large (64000 bytes) datagrams. I realize that the MTU is much smaller than 64000 bytes (a typical value is around 1500 bytes, from my reading), but I would

Answer 1

UDP pkts scheduling may be handled by multiple threads on OS level. That would explain why you receive them out of order even on 127.0.0.1.