4 Apr
2017
4 Apr
'17
6:32 p.m.
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
5 Apr
5 Apr
12:26 p.m.
Hi Alandre,
----- On Apr 4, 2017, at 6:32 PM, Alandre de Carvalho alandrecm(a)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
12:51 p.m.
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(a)tpip.net> wrote:
Hi Alandre,
----- On Apr 4, 2017, at 6:32 PM, Alandre de Carvalho alandrecm(a)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
2601
days inactive
2602
days old
osmocom-net-gprs@lists.osmocom.org
2 comments
3 participants
participants (3)
-
Alandre de Carvalho -
Alandre De Carvalho
-
Andreas Schultz