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.