Kernel GTP » History » Version 9
osmith, 03/01/2021 02:57 PM
add example output
1 | 5 | laforge | h1. OsmoGGSN and Linux Kernel accelerated GTP-U |
---|---|---|---|
2 | 2 | laforge | |
3 | 5 | laforge | {{>toc}} |
4 | 1 | laforge | |
5 | 8 | osmith | OsmoGGSN has support to use the Linux kernel GTP-U code to accelerate the data/user plane while still implementing the control plane (GTP-C) in userspace in OsmoGGSN. |
6 | 5 | laforge | |
7 | 2 | laforge | For more information about the Linux kernel GTP-U code, please see [[linux-kernel-gtp-u:]] |
8 | |||
9 | 5 | laforge | h2. Building OsmoGGSN with kernel which has GTP-U support |
10 | 1 | laforge | |
11 | 6 | laforge | At the time of writing (2018-04-26) of this wiki, below listed distributions have support of GTP kernels : |
12 | 1 | laforge | |
13 | 6 | laforge | * Debian |
14 | ** Debian 9 "stretch" (kernel 4.9.0-6) |
||
15 | ** Debian "unstable" |
||
16 | * Ubuntu |
||
17 | ** Ubuntu 16.04 "xenial" (kernel 4.8, 4.10, 4.13) |
||
18 | ** Ubuntu 17.10 "artful" (kernel 4.13) |
||
19 | * OpenSUSE |
||
20 | ** OpenSUSE Tumbleweed (kernel "stable" 4.8, 4.12) |
||
21 | * Fedora |
||
22 | ** Fedora 25 (kernel 4.13 "kconfig":https://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/fedora.git/diff/fedora/configs/kernel-4.13.16-x86_64.config?h=f25&id=c7f8c6df25a148b887515787667c75e18fa9790d) |
||
23 | ** Fedora 26 (kernel 4.15 "kconfig":https://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/fedora.git/diff/fedora/configs/kernel-4.15.18-x86_64.config?h=f26&id=7b0ed3e9a5d6773dddcc904c1d4e67c1307f02dd) |
||
24 | ** Fedora 27 (kernel 4.16 "kconfig":https://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/fedora.git/tree/fedora/configs/kernel-4.16.4-x86_64.config?h=f27&id=d06904e7457b50b9cfc108667b5b65777a43cc75) |
||
25 | 1 | laforge | |
26 | 6 | laforge | If you're using any other distribution, or are building your own kernels, please verify that @CONFIG_GTP@ is set to either @m@ or @y@. |
27 | 1 | laforge | |
28 | 6 | laforge | *If @CONFIG_GTP@ is not enabled, you cannot use kernel GTP-U!* |
29 | |||
30 | 1 | laforge | Check if package @libc-ares-dev@ is installed and if not please add it. |
31 | |||
32 | 6 | laforge | h3. Installing dependencies and build library @libosmocore@ |
33 | 1 | laforge | |
34 | 5 | laforge | You can install required dependency packages with: |
35 | 1 | laforge | |
36 | <pre> |
||
37 | 8 | osmith | $ sudo apt install libtalloc-dev libpcsclite-dev |
38 | 1 | laforge | </pre> |
39 | |||
40 | 5 | laforge | Please follow instructions provided at [[cellular-infrastructure:Build from source]] in order to install libosmocore |
41 | 1 | laforge | |
42 | |||
43 | 5 | laforge | h3. Installing dependencies and build library @libgtpnl@ |
44 | 1 | laforge | |
45 | 5 | laforge | You can install dependencies with: |
46 | |||
47 | 1 | laforge | <pre> |
48 | 8 | osmith | $ sudo apt install libmnl-dev |
49 | 1 | laforge | </pre> |
50 | |||
51 | 5 | laforge | Then build libgtpnl like this |
52 | <pre> |
||
53 | 8 | osmith | $ git clone git://git.osmocom.org/libgtpnl.git |
54 | $ cd libgtpnl |
||
55 | $ autoreconf -fi |
||
56 | $ ./configure |
||
57 | $ make |
||
58 | $ sudo make install |
||
59 | $ sudo ldconfig |
||
60 | 5 | laforge | </pre> |
61 | 1 | laforge | |
62 | 5 | laforge | h3. osmo-ggsn |
63 | |||
64 | Build OsmoGGSN like this: |
||
65 | |||
66 | 1 | laforge | <pre> |
67 | 8 | osmith | $ git clone git://git.osmocom.org/osmo-ggsn.git |
68 | $ cd osmo-ggsn |
||
69 | $ ./configure --enable-gtp-linux |
||
70 | $ make |
||
71 | $ sudo make install |
||
72 | $ sudo ldconfig |
||
73 | 1 | laforge | </pre> |
74 | |||
75 | Following message is shown at end of the command: @ ./configure --enable-gtp-linux@ |
||
76 | |||
77 | <pre> |
||
78 | 5 | laforge | OsmoGGSN Configuration: |
79 | 1 | laforge | GTP Linux kernel support: yes |
80 | </pre> |
||
81 | |||
82 | This means that appropriate header files are available. |
||
83 | |||
84 | 8 | osmith | h2. Using OsmoGGSN with kernel which has GTP-U support |
85 | 1 | laforge | |
86 | In order to find out whether gtp.ko module is available we can enter following command: |
||
87 | |||
88 | <pre> |
||
89 | 8 | osmith | $ find /lib/modules/$(uname -r) -name gtp.ko |
90 | 1 | laforge | </pre> |
91 | |||
92 | Output below shows that gtp.ko module is present: |
||
93 | |||
94 | <pre> |
||
95 | /lib/modules/4.8.0-30-generic/kernel/drivers/net/gtp.ko |
||
96 | </pre> |
||
97 | |||
98 | |||
99 | 5 | laforge | We are loading module gtp from kernel issuing command: <pre>sudo modprobe gtp</pre> |
100 | 1 | laforge | |
101 | when you enter: |
||
102 | <pre> |
||
103 | 8 | osmith | $ lsmod | grep gtp |
104 | 1 | laforge | </pre> |
105 | |||
106 | then more information about gtp and related udp tunnel can be obtained: |
||
107 | |||
108 | <pre> |
||
109 | gtp 28672 0 |
||
110 | udp_tunnel 16384 1 gtp |
||
111 | </pre> |
||
112 | |||
113 | |||
114 | Some helpful tools are available in: @libgtpnl/tools@ |
||
115 | |||
116 | 8 | osmith | you can get more details about gtp-tunnel, entering command from the OsmoGGSN shell: |
117 | 1 | laforge | |
118 | <pre> |
||
119 | 8 | osmith | $ sudo ./gtp-tunnel list |
120 | 1 | laforge | </pre> |
121 | |||
122 | Output will be similar to: |
||
123 | <pre> |
||
124 | version 1 tei 1/0 ms_addr 192.168.0.2 sgsn_addr 127.0.0.2 |
||
125 | </pre> |
||
126 | 5 | laforge | |
127 | 1 | laforge | Note: OsmoGGSN is started by: |
128 | <pre> |
||
129 | 8 | osmith | $ sudo osmo-ggsn -c osmo-ggsn.cfg |
130 | 1 | laforge | </pre> |
131 | |||
132 | Related output should be similar to the one shown below: |
||
133 | |||
134 | <pre> |
||
135 | 9 | osmith | <0002> ggsn.c:186 APN(internet): Starting |
136 | <0002> ggsn.c:204 APN(internet): Opening Kernel GTP device tun4 |
||
137 | <0002> ggsn.c:215 APN(internet): Skipping APN start |
||
138 | <0002> ggsn.c:794 GGSN(ggsn0): Starting GGSN |
||
139 | <000d> gtp.c:902 GTP: gtp_newgsn() started at 127.0.0.2 |
||
140 | <0002> ggsn.c:830 GGSN(ggsn0): Successfully started |
||
141 | <0002> ggsn.c:186 APN(internet): Starting |
||
142 | <0002> ggsn.c:204 APN(internet): Opening Kernel GTP device tun4 |
||
143 | <0002> gtp-kernel.c:79 Initialized GTP kernel mode (genl ID is 25) |
||
144 | <0001> tun.c:217 GTP kernel configured |
||
145 | <0002> ggsn.c:236 APN(internet): Setting tun IP address 172.16.222.0/24 |
||
146 | <0002> ggsn.c:294 APN(internet): Creating IPv4 pool 172.16.222.0/24 |
||
147 | <0002> ggsn.c:168 APN(internet): Blacklist tun IP 172.16.222.0/24 |
||
148 | <0002> ggsn.c:325 APN(internet): Successfully started |
||
149 | <0005> telnet_interface.c:104 Available via telnet 127.0.0.1 4260 |
||
150 | <000c> control_if.c:916 CTRL at 127.0.0.1 4257 |
||
151 | 1 | laforge | </pre> |
152 | |||
153 | 6 | laforge | You can now start to establish PDP contexts to your new osmo-ggsn instance, from [[OsmoSGSN:]], @sgsnemu@ or third-party SGSNs |