|
|
|
|
@ -80,3 +80,47 @@ possible to pick differing ports on the same IP address), like: |
|
|
|
|
ggsn ggsn0 |
|
|
|
|
gtp bind-ip 127.0.0.2 |
|
|
|
|
---- |
|
|
|
|
|
|
|
|
|
=== GTP-U kernel module |
|
|
|
|
|
|
|
|
|
WARNING: As of writing, the kernel module does not support IPv6. |
|
|
|
|
|
|
|
|
|
OsmoGGSN has support to use the Linux kernel GTP-U tunnel driver to accelerate |
|
|
|
|
the data/user plane while still implementing the control plane (GTP-C) in |
|
|
|
|
userspace in OsmoGGSN. The kernel module is included in Linux 4.7.0 and higher. |
|
|
|
|
Notably the Debian GNU/Linux distribution has it enabled by default. |
|
|
|
|
|
|
|
|
|
In order to use this feature, make sure that your Linux kernel was configured |
|
|
|
|
to support it (`CONFIG_GTP=m` or `=y`). Furthermore, `osmo-ggsn` must have been |
|
|
|
|
built with `./configure` argument `--enable-gtp-linux` (which requires libgtpnl |
|
|
|
|
to be installed). |
|
|
|
|
|
|
|
|
|
Load the kernel module with: |
|
|
|
|
|
|
|
|
|
---- |
|
|
|
|
$ sudo modprobe gtp |
|
|
|
|
---- |
|
|
|
|
|
|
|
|
|
Then start OsmoGGSN with a configuration file that uses `gtpu-mode kernel-gtp`. |
|
|
|
|
|
|
|
|
|
A full example configuration is in `osmo-ggsn-kernel-gtp.cfg`. |
|
|
|
|
|
|
|
|
|
---- |
|
|
|
|
$ sudo osmo-ggsn -c /usr/share/doc/osmo-ggsn/examples/osmo-ggsn-kernel-gtp.cfg |
|
|
|
|
---- |
|
|
|
|
|
|
|
|
|
.Example: APN with kernel-gtp |
|
|
|
|
---- |
|
|
|
|
ggsn ggsn0 |
|
|
|
|
gtp state-dir /tmp |
|
|
|
|
gtp bind-ip 127.0.0.2 |
|
|
|
|
apn internet |
|
|
|
|
gtpu-mode kernel-gtp |
|
|
|
|
tun-device tun4 |
|
|
|
|
type-support v4 |
|
|
|
|
ip prefix dynamic 172.16.222.0/24 |
|
|
|
|
ip dns 0 8.8.8.8 |
|
|
|
|
ip dns 1 8.8.4.4 |
|
|
|
|
ip ifconfig 172.16.222.0/24 |
|
|
|
|
no shutdown |
|
|
|
|
---- |
|
|
|
|
|
