Question about libgtpnl

Harald Welte laforge at
Tue Feb 2 11:01:32 UTC 2021

On Sun, Jan 31, 2021 at 11:25:25PM +0330, morteza ali Ahmadi wrote:
> Hi Osmocom team
> We have a basic question about libgtpnl (Linux Kernel GTP-U).

I would suggest that you start with setting this up using OsmoGGSN.

It has built-in support for kernel GTP (via libgtpnl), see the related user manual.

Once that works, you have a "known working" setup and you can start comparing
the differences between how OsmoGGSN uses libgtpnl and how you are using it manually.

I have to admit that I never considered using the manual gtp-link/gtp-tunnel commands
in a "real" network.  Those were only ever used in artificial functional testing.

- Harald Welte <laforge at>  
"Privacy in residential applications is a desirable marketing option."
                                                  (ETSI EN 300 175-7 Ch. A6)

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