diff --git a/openair1/SIMULATION/ETH_TRANSPORT/README.txt b/openair1/SIMULATION/ETH_TRANSPORT/README.txt
index 0151a18f7795ca24f1d2d0661b1086f4a0264959..a1c1ed9562e1da094d010ed8af4b3a5e96abb7e8 100644
--- a/openair1/SIMULATION/ETH_TRANSPORT/README.txt
+++ b/openair1/SIMULATION/ETH_TRANSPORT/README.txt
@@ -13,8 +13,13 @@ For Ubuntu older than 12.04:
 wget http://openpgm.googlecode.com/files/libpgm-5.1.118.tar.gz
 tar xvf libpgm-5.1.118.tar.gz
 cd libpgm-5.1.118/openpgm/pgm
-./configure
+./configure --prefix=/usr
 make
 sudo make install
 
 We have to clean oaisim compilation and re-compile
+
+
+When running OAI, the -D should be used to provide the NIC to bind.
+Parameter can be either an interface name or an ip address (refer to this link
+for more informations: http://code.google.com/p/openpgm/wiki/OpenPgmConceptsTransport)