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  [Kryonet] Is there a limit on UDP packet size?  (Read 1966 times)
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Offline epicbo

Senior Newbie


Exp: 7 years



« Posted 2014-12-11 13:22:26 »

I found out that my client doesn't receive any UDP packets if they're bigger than about 1460 bytes. If they're smaller than that, it works just fine. I've tried using Log.set(Log.LEVEL_DEBUG) but it doesn't help at all. The server simply says "00:10 DEBUG: [kryonet] Connection 1 sent UDP: Packet (1486)". The client doesn't even say anything. It doesn't matter if I send one packet every second or 30 every second, the result is the same, it only depends on the size of the packet. Also, I can send TCP packets much bigger than 1460 bytes without any problems. So could there be a limit on how big UDP packets can be? I admit I don't know much about networking.
Offline basil_

« JGO Bitwise Duke »


Medals: 418
Exp: 13 years



« Reply #1 - Posted 2014-12-11 13:46:08 »

sounds like falling into fragmentation after hitting MTU size.

http://en.wikipedia.org/wiki/Maximum_transmission_unit
http://serverfault.com/questions/246508/how-is-the-mtu-is-65535-in-udp-but-ethernet-does-not-allow-frame-size-more-than
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