On 24 Jan 2012, at 11:10, Dennis Borgmann wrote: > Hi lwIP-users! > > I am sorry, if this mail seems to be "old stuff" for most of you, but I could > not find any detailed information about what I am facing here. > > I have lwIP 1.3.2 running combined with FreeRTOS on an AVR32UC3A0512. It > works fine, but as soon as I start a ping with packetsize 2000(or something > similar), the stack seems to crash - meaning, I can't reach the device via IP > anymore. As long as I stay below 1536, everything just runs fine.
I think it could just be that the ping code in that release assumes that the whole datagram will fit in a single packet. When you exceed the MTU the datagram will be fragmented and I doubt the code has been written to cope with that. > What could be the option, that I'd have to increase in order to get a > "stable" lwIP-stack with packets bigger than 1536(let's say even 65000...)? I would try and see if (i) the more recent versions of lwIP do what you want, or (ii) if the problem is just with ICMP; I would hope that large UDP datagrams are handled correctly for example. Kieran _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
