13 Apr
2021
13 Apr
'21
2:14 p.m.
Hi Keith,
On Tue, Apr 13, 2021 at 11:10:18AM +0100, Keith A. Milner wrote:
However, if I change to using Kernel GTP, by changing
the gtpu-mode to
"kernel-gtp", traffic will not route (and, yes, I have done modprobe gtp).
After
some exploration, it appears the tun device is being created with an MTU of
zero which then, cannot pass traffic:
I think this one is fixed in
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/d…
but "of course" Debian 10 is using a too old kernel to contain that fix.
You could ask Debian if they'd back-port it to the stable kernel?
We would certainly also be happy to accept a patch mentioning this in the user
manual, or a patch that makes osmo-ggsn check the MTU at startup time and print
some big error message into the log.
--
- Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/
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