Yeah, in the meantime I thought about the problem and learnt the differences between layer 2 and 3. :-)
Stefan Am 16.08.2012 um 10:43 schrieb Sylvain Rochet <[email protected]>: > Hi, > > On Tue, Aug 14, 2012 at 03:01:59PM +0200, Stefan Lankes wrote: >> Hi LwIP users, >> >> I have an ARP problem and I am not sure, if this a problem of LwIP. >> >> In our academic operating system, we use LwIP 1.4.0 as TCP/IP stack. >> My test system posses two network devices and each device belongs to >> its own subnet. I enabled IP forwarding to transfer IP packets between >> the subnets and it seems to work. >> >> However, if a member of subnet A broadcasts an ARP request to >> determine the physical address of a member of subnet B, our system >> does not forward these broadcasts to subnet B. LwIP drops the requests >> with the message "ARP request was not for us." >> >> Is this behavior correct? > > With your wanted behavior, a broadcast Ethernet frame sent to a router > connected to the global IP space would be received by all IP equipments > connected, which is about billions of systems. And you are considering > the whole Internet is only made of Ethernet links, which is false. Maybe > you have to learn the difference between layer 2 and layer 3. > > Sylvain > _______________________________________________ > lwip-users mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/lwip-users _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
