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?
Thanks in advance,
Alandre
Hi Alandre,
----- On Apr 4, 2017, at 6:32 PM, Alandre de Carvalho alandrecm@tipbrasil.com.br 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
Hi Andreas,
Thanks for your responde. I'm going to check on OAI.
Thank you
Alandre
Sent from my iPhone
On 5 Apr 2017, at 07:26, Andreas Schultz aschultz@tpip.net wrote:
Hi Alandre,
----- On Apr 4, 2017, at 6:32 PM, Alandre de Carvalho alandrecm@tipbrasil.com.br 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
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