Strange Problem with 16 byte packets

[Glen Kent <glen.kent () gmail com>]

Hi,

I am using a proprietary protocol and sending a bunch of bytes to a Draytek
router at an enterprise site. When i send the data in TCP batches of 1 MB i
see no problem. However,  when i first send 16 bytes followed by 1 MB of
data, and then repeat this till the entire data has beeen sent out. During
this process I see that my TCP session times out. Unable to understand why
this could be happening? How can sending 16 bytes of data followed by 1MB
of data affect the transfer.

Thanks !