10 May
2016
10 May
'16
10:11 p.m.
On Tue, May 10, 2016 at 09:31:53PM +0200, Sipos Csaba wrote:
Hi Pablo,
Thanks for the info!
Just went through the code, and wanted to ask if I am right that
this implementation does not support GTP-U echo request/reply yet?
I am asking because according to the specs. this is an optional
feature, but in practice there are quite a lot of ENB products that
require a response to the GTP-U Echo Req. they send, otherwise they
are not going to start forwarding any data on the GTP-U path. The
reason for this is that in practice the ENB is always connected to
more than one MME, and the only way for the ENB to know which SGW is
available is to send GTP-U echo requests to check the availability
of the service.
We don't handle this from the kernel, this GTP-U echo request is
passed up to userspace. The idea is to support any signaling message
from userspace, only G-PDU messages are handled from the kernel
itself. Openggsn has code to generate the Echo response for this.
Just noticed that the link for libgtpnl is not working
yet.
cgit is not working properly for some reason, but the repo can be
cloned via:
git clone git://git.osmocom.org/libgtpnl