<div dir="ltr"><div>Yeah did that as well.<br></div><div>I had that initial doubt that it might not be routing properly<br><br><b>root@nist:/home/nist# sudo iptables -L -t nat</b><br>Chain PREROUTING (policy ACCEPT)<br>target prot opt source destination <br>
<br>Chain INPUT (policy ACCEPT)<br>target prot opt source destination <br><br>Chain OUTPUT (policy ACCEPT)<br>target prot opt source destination <br><br>Chain POSTROUTING (policy ACCEPT)<br>
target prot opt source destination <br>MASQUERADE all -- <a href="http://10.0.254.0/24">10.0.254.0/24</a> anywhere <br></div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Thu, May 15, 2014 at 3:43 PM, Ivan Kluchnikov <span dir="ltr"><<a href="mailto:Ivan.Kluchnikov@fairwaves.ru" target="_blank">Ivan.Kluchnikov@fairwaves.ru</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi,<br>
<br>
Check that you have configured the network correctly.<br>
Try to use this:<br>
sudo su<br>
tunctl<br>
ifconfig tap0 127.0.0.2 up<br>
echo 1 > /proc/sys/net/ipv4/ip_forward<br>
<div class="">iptables -A POSTROUTING -s <a href="http://10.0.254.0/24" target="_blank">10.0.254.0/24</a> -t nat -o eth0 -j MASQUERADE<br>
<br>
</div>2014-05-15 13:52 GMT+04:00 Joe Ge <<a href="mailto:jijo123789@gmail.com">jijo123789@gmail.com</a>>:<br>
<div class="HOEnZb"><div class="h5">> Hi Ivan,<br>
><br>
> I tried with the specified package and the configuration files and all the<br>
> modules seem to be executing properly.<br>
> Thanks a lot for the help with that.<br>
><br>
> But there is still some issue as the tunnel doesn't seem to be set up<br>
> properly.<br>
><br>
> GGSN Output<br>
> ......<br>
> encaps_tun. Packet received: forwarding to tun<br>
> encaps_tun. Packet received: forwarding to tun<br>
> encaps_tun. Packet received: forwarding to tun<br>
> .....<br>
><br>
> OSMO-PCU Output<br>
> ...........<br>
> 008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL) len=85<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=70<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=71<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=79<br>
> <0007> gprs_rlcmac_meas.cpp:104 UL RSSI of TLLI=0xdeacae72: -65 dBm<br>
> <0007> gprs_rlcmac_meas.cpp:104 UL RSSI of TLLI=0xdeacae72: -66 dBm<br>
> <0001> pcu_l1_if.cpp:282 RACH request received: sapi=1 qta=0, ra=121,<br>
> fn=2234747<br>
> <0002> tbf.cpp:1503 TBF(TFI=0 TLLI=0x00000000 DIR=UL) changing tlli from<br>
> TLLI=0x00000000 TLLI=0xdeacae72 ul_changed=0<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=70<br>
> <0007> gprs_rlcmac_meas.cpp:104 UL RSSI of TLLI=0xdeacae72: -65 dBm<br>
> <0001> pcu_l1_if.cpp:282 RACH request received: sapi=1 qta=0, ra=121,<br>
> fn=2234916<br>
> <0002> tbf.cpp:1503 TBF(TFI=0 TLLI=0x00000000 DIR=UL) changing tlli from<br>
> TLLI=0x00000000 TLLI=0xdeacae72 ul_changed=0<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=88<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=71<br>
> <0007> gprs_rlcmac_meas.cpp:104 UL RSSI of TLLI=0xdeacae72: -65 dBm<br>
> <0001> pcu_l1_if.cpp:282 RACH request received: sapi=1 qta=0, ra=123,<br>
> fn=2235089<br>
> <0002> tbf.cpp:1503 TBF(TFI=0 TLLI=0x00000000 DIR=UL) changing tlli from<br>
> TLLI=0x00000000 TLLI=0xdeacae72 ul_changed=0<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=88<br>
> <0007> gprs_rlcmac_meas.cpp:104 UL RSSI of TLLI=0xdeacae72: -65 dBm<br>
> <0001> pcu_l1_if.cpp:282 RACH request received: sapi=1 qta=0, ra=121,<br>
> fn=2235910<br>
> <0002> tbf.cpp:1503 TBF(TFI=0 TLLI=0x00000000 DIR=UL) changing tlli from<br>
> TLLI=0x00000000 TLLI=0xdeacae72 ul_changed=0<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=88<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=70<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=71<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=71<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=81<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=71<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=81<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=60<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=60<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=88<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=81<br>
> <0007> gprs_rlcmac_meas.cpp:104 UL RSSI of TLLI=0xdeacae72: -66 dBm<br>
> <0001> pcu_l1_if.cpp:282 RACH request received: sapi=1 qta=0, ra=123,<br>
> fn=2236160<br>
> <0002> tbf.cpp:1503 TBF(TFI=0 TLLI=0x00000000 DIR=UL) changing tlli from<br>
> TLLI=0x00000000 TLLI=0xdeacae72 ul_changed=0<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=88<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=88<br>
> <0007> gprs_rlcmac_meas.cpp:104 UL RSSI of TLLI=0xdeacae72: -66 dBm<br>
> <0001> pcu_l1_if.cpp:282 RACH request received: sapi=1 qta=0, ra=123,<br>
> fn=2236313<br>
> <0002> tbf.cpp:1503 TBF(TFI=0 TLLI=0x00000000 DIR=UL) changing tlli from<br>
> TLLI=0x00000000 TLLI=0xdeacae72 ul_changed=0<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=71<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=88<br>
> <0008> tbf.cpp:1691 LLC [PCU -> SGSN] TBF(TFI=0 TLLI=0xdeacae72 DIR=UL)<br>
> len=88<br>
> <0007> gprs_rlcmac_meas.cpp:104 UL RSSI of TLLI=0xdeacae72: -66 dBm<br>
> <0001> pcu_l1_if.cpp:282 RACH request received: sapi=1 qta=0, ra=120,<br>
> fn=2237386<br>
> <0002> tbf.cpp:1503 TBF(TFI=0 TLLI=0x00000000 DIR=UL) changing tlli from<br>
> TLLI=0x00000000 TLLI=0xdeacae72 ul_changed=0<br>
> ...........<br>
><br>
><br>
> The DNS query seems to be reaching the SGSN and getting encapsulated in GTP<br>
> from there on.<br>
> But the wireshark trace shows that there is no packet captured for the tap0<br>
> interface.<br>
><br>
> Any suggestions<br>
><br>
><br>
> On Tue, May 13, 2014 at 7:15 PM, Ivan Kluchnikov<br>
> <<a href="mailto:Ivan.Kluchnikov@fairwaves.ru">Ivan.Kluchnikov@fairwaves.ru</a>> wrote:<br>
>><br>
>> Hi Joe,<br>
>><br>
>> If you use UmDESK, osmo-trx, osmo-bts, osmo-nitb and osmo-sgsn should<br>
>> be already installed.<br>
>> So you should use following manual:<br>
>><br>
>> === Build & Install ===<br>
>> [osmo-pcu]<br>
>> git clone git://<a href="http://git.osmocom.org/osmo-pcu" target="_blank">git.osmocom.org/osmo-pcu</a><br>
>> cd osmo-pcu/<br>
>> git checkout sysmocom/master<br>
>> autoreconf -i<br>
>> ./configure --enable-sysmocom-bts<br>
>> make<br>
>> cd ..<br>
>><br>
>> [openggsn]<br>
>> git clone git://<a href="http://git.osmocom.org/openggsn.git" target="_blank">git.osmocom.org/openggsn.git</a><br>
>> cd openggsn/<br>
>> autoreconf -i<br>
>> ./configure<br>
>> make<br>
>> sudo make install<br>
>> cd ..<br>
>><br>
>> === Configuration ===<br>
>><br>
>> [openggsn configuration]<br>
>> Copy ggsn.conf to /etc directory<br>
>><br>
>> [sgsn configuration]<br>
>> Copy osmo_sgsn.cfg to openbsc/openbsc/src/gprs directory<br>
>><br>
>><br>
>> [Network configuration]<br>
>> # We use eth0 interface for connection to the internet, if you use<br>
>> other interface, you should edit fourth line.<br>
>> sudo tunctl<br>
>> sudo ifconfig tap0 127.0.0.2 up<br>
>> sudo echo 1 > /proc/sys/net/ipv4/ip_forward<br>
>> sudo iptables -A POSTROUTING -s <a href="http://10.0.254.0/24" target="_blank">10.0.254.0/24</a> -t nat -o eth0 -j MASQUERADE<br>
>><br>
>><br>
>> [OpenBSC configuration]<br>
>><br>
>> Add this to the network/bts node in openbsc.cfg:<br>
>><br>
>> gprs mode gprs<br>
>> gprs routing area 0<br>
>> gprs cell bvci 2<br>
>> gprs nsei 101<br>
>> gprs nsvc 0 nsvci 101<br>
>> gprs nsvc 0 local udp port 23030<br>
>> gprs nsvc 0 remote udp port 23000<br>
>> gprs nsvc 0 remote ip 127.0.0.1<br>
>><br>
>> Allocate some timeslots to packet data (recommend to use at least 4<br>
>> timeslots for gprs).<br>
>> For this, just change network/bts/trx/timeslot nodes using :<br>
>><br>
>> phys_chan_config PDCH<br>
>><br>
>><br>
>> === Start ===<br>
>><br>
>> 1. ggsn<br>
>> 2. sgsn<br>
>> 3. pcu<br>
>> 4. osmo-nitb<br>
>> 5. osmo-bts<br>
>> 6. osmo-trx<br>
>><br>
>> 2014-05-13 14:11 GMT+04:00 Joe Ge <<a href="mailto:jijo123789@gmail.com">jijo123789@gmail.com</a>>:<br>
>> ><br>
>> > Hi All,<br>
>> ><br>
>> > I have installed OpenBSC +Osmo-BTS following Osmocom's netwrok from<br>
>> > scratch<br>
>> > link <a href="http://openbsc.osmocom.org/trac/wiki/network_from_scratch" target="_blank">http://openbsc.osmocom.org/trac/wiki/network_from_scratch</a><br>
>> > Now I would like to implemenet GPRS facility in the testbedusing<br>
>> > OpenGGSN<br>
>> > and Osmo-SGSN.<br>
>> ><br>
>> > I am using fairwaves UmDESK for this implementation.<br>
>> ><br>
>> > I followed the procedure as suggested in the<br>
>> > <a href="http://openbsc.osmocom.org/trac/wiki/OpenBSC_GPRS" target="_blank">http://openbsc.osmocom.org/trac/wiki/OpenBSC_GPRS</a><br>
>> > with the added modification as suggested in<br>
>> > <a href="https://wush.net/trac/rangepublic/wiki/fairwaves.gprs" target="_blank">https://wush.net/trac/rangepublic/wiki/fairwaves.gprs</a><br>
>> ><br>
>> > But this doesn't seem to work out.<br>
>> ><br>
>> > Currently the systems execute properly with the following outputs<br>
>> ><br>
>> > GGSN Output:<br>
>> ><br>
>> > root@nist:/home/nist# ggsn<br>
>> > cmdline_parser_configfile<br>
>> > listen: 127.0.0.1<br>
>> > conf: /etc/ggsn.conf<br>
>> > fg: 1<br>
>> > debug: 1<br>
>> > qos: 0x0b921f<br>
>> > apn: internet<br>
>> > net: <a href="http://192.168.0.0/24" target="_blank">192.168.0.0/24</a><br>
>> > dynip: <a href="http://192.168.0.0/24" target="_blank">192.168.0.0/24</a><br>
>> > pidfile: /var/run/ggsn.pid<br>
>> > statedir: /var/lib/ggsn/<br>
>> > timelimit: 0<br>
>> > gtpclient: Initialising GTP tunnel<br>
>> > openggsn[3822]: GTP: gtp_newgsn() started<br>
>> > Creating tun interface<br>
>> > Setting tun IP address<br>
>> ><br>
>> > Osmo-SGSN Output:<br>
>> > root@nist:/home/nist# osmo-sgsn -c<br>
>> > OpenBSC_GPRS/openbsc/openbsc/src/gprs/osmo_sgsn.cfg<br>
>> > <0010> gprs_ns.c:199 NSVCI=65534 Creating NS-VC<br>
>> ><br>
>> > Osmo-PCU Output:<br>
>> > root@nist:/home/nist# osmo-pcu<br>
>> > No config file: 'osmo-pcu.cfg' Using default config.<br>
>> ><br>
>> > With these I also ran:<br>
>> > Osmo-NITB<br>
>> > Osmobts-TRX<br>
>> > Osmo-TRX<br>
>> ><br>
>> > All of these run normally as well.<br>
>> > My UE is able to detect the network as well but not able to connect with<br>
>> > it.<br>
>> ><br>
>> > Given below are the config file entries<br>
>> ><br>
>> > ggsn.conf:<br>
>> > listen 127.0.0.1<br>
>> ><br>
>> > osmo-sgsn.cfg:<br>
>> > gtp local-ip 127.0.0.2<br>
>> > ggsn 0 remote-ip 127.0.0.1<br>
>> > .....<br>
>> > encapsulation udp local-ip 127.0.0.2<br>
>> ><br>
>> > open-bsc.cfg:<br>
>> > gprs nsvc 0 remote udp port 23000<br>
>> > gprs nsvc 0 remote ip 127.0.0.2<br>
>> ><br>
>> > I had the following doubts regarding the given installation procedure<br>
>> ><br>
>> > 1. The fairwaves.gprs implementation using Chemeris's gprs-work seems to<br>
>> > implement with Asterisk as PBX whereas I require it to run with the<br>
>> > osmo-nitb.<br>
>> ><br>
>> > 2. The gprs-work branch still makes use of BTS transceiver and I wanted<br>
>> > it<br>
>> > to work with the Osmo-nitb implementation using osmobts-trx and osmo-trx<br>
>> ><br>
>> > Can somebody please help me out with this?<br>
>> ><br>
>> > Or is there any alternative implementation which can be tried to execute<br>
>> > them together.<br>
>> ><br>
>> > Looking forward to hearing from you,<br>
>> ><br>
>> > With Regards,<br>
>> > Jijo<br>
>> ><br>
>><br>
>><br>
>><br>
>> --<br>
>> Regards,<br>
>> Ivan Kluchnikov.<br>
>> <a href="http://fairwaves.ru" target="_blank">http://fairwaves.ru</a><br>
><br>
><br>
<br>
<br>
<br>
--<br>
Regards,<br>
Ivan Kluchnikov.<br>
<a href="http://fairwaves.ru" target="_blank">http://fairwaves.ru</a><br>
</div></div></blockquote></div><br></div>