Hi Alandre, ----- On Apr 4, 2017, at 6:32 PM, Alandre de Carvalho [email protected] wrote:
> Hi everyone, > We’re using kernel GTP developed by Osmocom on openair-cn. Turns out that we > are > not able to connect an UE for longer than 20 seconds using an ZTE eNB > apparently because the GTP-U is not answering to the echo requests. As far I > know this response is supposed to be implemented but it is not answering. Do > you guys have any tips on this issue? I don't know how OpenAir-CN uses the kernel module, but Echo handling is not part of the kernel implementation. The kernel will pass all GTP-U packets that do not match a PDP context (this applies to Echo Request) up to the user space management process which then has to generate the proper response. Your problem feels a bit like the OAI-CN userspace is not handling the echo requests. Maybe it's not implemented? Regards Andreas > Thanks in advance, > Alandre
