/etc/osmo_sgsn.cfg:
encapsulation udp local-ip 192.168.10.53
encapsulation udp local-port 23000
/etc/openbsc.cfg:
gprs nsvc 0 local udp port 23000
gprs nsvc 0 remote udp port 23000
gprs nsvc 0 remote ip 192.168.10.53
I don't think both processes can use the same port; move one of them
and configure the other accordingly.
Hmm... They are both set to the same port in my openbsc.cfg