<div dir="ltr">Hi,<div><br></div><div>
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">I need to increase the throughput through the GTP tunnels to around 9Gb/s.</span>
<br></div><div><br></div><div>I have two servers and they are connected using two GTP tunnels over a Mellanox 25Gb/s link. Via the tunnels I am seeing a total of 4.2 Gb/s to 4.5 Gb/s using iPerf. </div><div><br></div><div>If data is sent without the tunnels I see a throughput of around 24.5Gb/s. </div><div><br></div><div>I have tried various tweaks to improve the throughput over the GTP tunnels and have only made marginal gains. I have tried iPerf 2.0.9 and iPerf3 and see the same results. Wireshark shows the iPerf MTU is reflected in the pcap logs.</div><div><br></div><div>I have tried changing the txqueuelen on the tunnels, changing osmo-ggsn niceness, network buffer sizes etc. </div><div><br></div><div>The restriction seems to be osmo-ggsn as that is taking up to 92% CPU on one of the cores when the throughput tests are running.<br></div><div><br></div><div>I'm hoping I have made a mistake in the configuration of OsmoGGSN and
<span style="color:rgb(34,34,34);font-family:Arial,sans-serif;font-size:13.3333px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">sgsnemu. </span></div><div><br></div><div>--</div><div><br></div><div>
<div style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial">The servers are running Ubuntu 16.04 desktop. 16GB RAM - 12.6GB free when running throughput tests. Intel E52620v3. Mellanox <span style="font-size:10pt;font-family:Arial,sans-serif">MCX516A-CCAT network adapter. 25Gb direct attach copper connecting the two servers <span> </span><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">OsmoGGSN version 1.1.0.75-3e44-dirty.</span></span></div></div><div><br></div><div>For one of the servers: -</div><div>Mellanox interface details </div><div><div>ens3f0 Link encap:Ethernet HWaddr ec:0d:9a:a0:1d:7c </div><div> inet addr:172.16.8.1 Bcast:172.16.255.255 Mask:255.255.0.0</div><div> inet6 addr: fe80::8f38:33e3:bd46:dd65/64 Scope:Link</div><div> UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1</div><div> RX packets:142373677 errors:0 dropped:0 overruns:0 frame:0</div><div> TX packets:157500406 errors:0 dropped:0 overruns:0 carrier:0</div><div> collisions:0 txqueuelen:10000 </div><div> RX bytes:793825609487 (793.8 GB) TX bytes:879898325287 (879.8 GB)</div></div><div><br></div><div>Tunnel interface details</div><div><div>S1Utun Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 </div><div> inet addr:10.1.1.2 P-t-P:10.1.1.2 Mask:255.255.255.0</div><div> inet6 addr: fe80::b3fc:3d43:b751:bcbf/64 Scope:Link</div><div> UP POINTOPOINT RUNNING MTU:9000 Metric:1</div><div> RX packets:4640412 errors:0 dropped:0 overruns:0 frame:0</div><div> TX packets:2272797 errors:0 dropped:0 overruns:0 carrier:0</div><div> collisions:0 txqueuelen:500 </div><div> RX bytes:37729672063 (37.7 GB) TX bytes:118866016 (118.8 MB)</div><div><br></div><div>X2Utun Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 </div><div> inet addr:10.1.2.2 P-t-P:10.1.2.2 Mask:255.255.255.0</div><div> inet6 addr: fe80::6ed8:8a79:b3e9:a51d/64 Scope:Link</div><div> UP POINTOPOINT RUNNING MTU:9000 Metric:1</div><div> RX packets:1824011 errors:0 dropped:0 overruns:0 frame:0</div><div> TX packets:3856238 errors:0 dropped:4229 overruns:0 carrier:0</div><div> collisions:0 txqueuelen:500 </div><div> RX bytes:95648485 (95.6 MB) TX bytes:31367266755 (31.3 GB)</div></div><div><br></div><div><br></div><div><div>client side iperf</div><div>server1</div><div> iperf3 -c 10.1.2.1 -i1 -t 30 -M8100 -w 2048K -P8</div></div><div>server2</div><div>
<span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"> iperf3 -c 10.1.2.1 -i1 -t 30 -M8100 -w 2048K -P8</span>
<br></div><div>server1 and 2 iperf server</div><div> iperf3 -s -i1</div><div><br></div><div><br></div><div>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif">osmo-ggsn
-c /home/osmo-ggsn.cfg -g 172.16.1.1<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif"><span> </span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif">contents
of osmo-ggsn.cfg<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"><span> </span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">!<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">! OpenGGSN (0.94.1-adac) configuration saved from vty<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">!!<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">!<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">log stderr<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging filter all 1<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging color 1<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging print category 0<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging timestamp 0<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level ip info<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level tun info<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level ggsn info<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level sgsn notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level icmp6 notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lglobal notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level llapd notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level linp notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lmux notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lmi notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lmib notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lsms notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lctrl notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lgtp info<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lstats notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lgsup notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level loap notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lss7 notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lsccp notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lsua notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lm3ua notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> logging level lmgcp notice<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">!<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">stats interval 5<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">!<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">line vty<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">no login<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">!<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">ggsn X2Uggsn<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp state-dir /tmp<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp bind-ip 172.16.8.1<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp gtp0-port 3386<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp gtp1c-port 2123<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp gtp1u-port 2153<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp gtp1uremot-port 2153<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">apn X2U<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> gtpu-mode tun<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> tun-device X2Utun<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> type-support v4<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> ip prefix dynamic <a href="http://10.1.2.0/24">10.1.2.0/24</a><span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> ip dns 0 192.168.100.1<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> ip dns 1 8.8.8.8<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> ip ifconfig <a href="http://10.1.2.2/24">10.1.2.2/24</a><span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> no shutdown<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">default-apn X2U<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">no shutdown ggsn<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">ggsn S1Uggsn<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp state-dir /tmp<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp bind-ip 172.16.8.1<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp gtp0-port 3387<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp gtp1c-port 2124<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp gtp1u-port 2152<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">gtp gtp1uremot-port 2152<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">apn S1U<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> gtpu-mode tun<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> tun-device S1Utun<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> type-support v4<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> ip prefix dynamic <a href="http://10.1.1.0/24">10.1.1.0/24</a><span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> ip dns 0 192.168.100.1<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> ip dns 1 8.8.8.8<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> ip ifconfig <a href="http://10.1.1.2/24">10.1.1.2/24</a><span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)"> no shutdown<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">default-apn S1U<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(237,125,49)">no shutdown ggsn</span><span style="font-size:10pt;font-family:Arial,sans-serif"><span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif"><span> </span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif"><span> </span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif">sgsnemu
-l 127.0.0.2 -r 172.16.8.1 --contexts 1 -a S1U -m 4412345678 -q
0x00000000000b921f --defaultroute --pingcount 0 --gtpteid=8 --gtpversion=1
--gsnuip 172.16.1.1 --enduserip 10.1.1.1 --gtp0port 3387 --gtp1cport 2124
--nsapi 1<span></span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif"><span> </span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif"><span> </span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><span style="font-size:10pt;font-family:Arial,sans-serif">sgsnemu
-l 127.0.0.3 -r 172.16.8.1 --contexts 1 -a X2U -m 4412345678 -q
0x00000000000b921f --defaultroute --pingcount 0 --gtpteid=3 --gtpversion=1
--gsnuip 172.16.1.1 --enduserip 10.1.2.1 --gtp0port 3386 --gtp1cport 2123
--nsapi 2<span></span></span></p>
<br></div><div>Hopefully I have provided enough information. Any ideas on how to increase tunnel throughput?</div><div><br></div><div>Thanks</div><div><br></div><div>Dave</div></div>