Hi Harald and Firat,
Thank you very much for your reply. Sorry for not provide detail information when asking question. Lucky me, I am able to solve my problem now. It's because of wrong MAC address in packets that cause gtp device unable to receive. Stupid mistake. Still, I post it here just in case it can help other newbies like me. Thanks and best regards Cong On 11/23/2017 08:30 PM, Harald Welte wrote:
hi Cong, it would be very useful if you could give a description of what exactly your are trying to achieve, using which particular versions of which software. The kernel GTP module is known-working and has been verified with both OpenGGSN and OsmoSGSN. There are also other users such as OpenAirInterface as well as (as far as I know) ergw. It might be easiest to simply use one of those programs to understnd how the kernel GTP-U driver is used. Also, if you want us to be able to help you, please always include the detailed copy+paste output of the related commands and tools, e.g. the exact gtp-link and gtp-tunnel commands you have been using.
