diff --git a/openbsc/doc/examples/osmo-gtphub/gtphub-example.txt b/openbsc/doc/examples/osmo-gtphub/gtphub-example.txt
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+Here is a simple setup to test GTPHub operations. The IP addresses picked will
+work well only on a system that creates local addresses (127.0.0.123) on the
+fly (like linux) -- you may pick of course different IP addresses.
+
+Overview of the example setup:
+
+    sgsnemu               gtphub             ggsn
+    127.0.0.1 <--> 127.0.0.3  127.0.0.4 <--> 127.0.0.2
+
+Prerequisites: openggsn.
+
+Have a local directory where you store config files and from which you launch
+the GSNs and the hub (they will store restart counter files in that dir).
+In it, have these config files:
+
+ggsn.conf:
+
+    # GGSN local address
+    listen 127.0.0.2
+
+    # End User Addresses are picked from this range
+    net 10.23.42.0/24
+
+    pcodns1 8.8.8.8
+
+    logfile /tmp/foo
+
+gtphub.conf:
+
+    gtphub
+     bind-to-sgsns 127.0.0.3
+     bind-to-ggsns 127.0.0.4
+     ggsn-proxy 127.0.0.2
+    end
+
+
+(
+You may omit the ggsn-proxy if GRX ares is working, or if you add the GRX
+address and GGSN IP address to /etc/hosts something like:
+
+    127.0.0.2 internet.mnc070.mcc901.gprs
+
+)
+
+
+Once the config files are in place, start the programs, in separate terminals.
+GGSN and SGSN need to be started with root priviliges to be able to create tun
+interfaces. GTPHub may run as unprivileged user.
+
+The LD_LIBRARY_PATH below may be needed if OpenGGSN installed to /usr/local.
+
+
+1. GGSN:
+
+    sudo -s
+    cd <your-test-dir>
+    LD_LIBRARY_PATH=/usr/local/lib /usr/local/bin/ggsn -f -c ./ggsn.conf
+
+2. GTPHub:
+
+    cd <your-test-dir>
+    path/to/openbsc/openbsc/src/gprs/osmo-gtphub -c gtphub.conf #-e 1 #for DEBUG level
+
+3. SGSN test:
+
+    sudo -s
+    cd <your-test-dir>
+    /usr/local/bin/sgsnemu --createif -l 127.0.0.1 -r 127.0.0.3 --contexts=3
+
+This shows the basic setup of GTPHub. Testing internet traffic via sgsnemu
+still needs some effort to announce a mobile subscriber or the like (I have
+used a real BTS, osmo-sgsn and a testing SIM in a web phone, instead).
+
+I hope this helps to get you going.
+Any suggestions/patches are welcome!
+
+~Neels
+