tests: Solved multiple errors caused by configuration changes

refs #2360

Change-Id: I447724f18669782d00a1faac8589b58d923785dc
diff --git a/test_interest_loop/interest-loop-test.sh b/test_interest_loop/interest-loop-test.sh
index f917a06..7d0a81f 100755
--- a/test_interest_loop/interest-loop-test.sh
+++ b/test_interest_loop/interest-loop-test.sh
@@ -17,6 +17,10 @@
     r=$(ssh $b_ipaddr "sudo killall nfd 2>&1" 2>&1)
     r=$(ssh $c_ipaddr "sudo killall nfd 2>&1" 2>&1)
 }
+# generate nfd.conf: disable multicast faces
+cp /usr/local/etc/ndn/nfd.conf $workdir/nfd.conf
+ssh $CTRL_B "sed 's/mcast yes/mcast no/' /usr/local/etc/ndn/nfd.conf > $workdir/nfd.conf"
+ssh $CTRL_C "sed 's/mcast yes/mcast no/' /usr/local/etc/ndn/nfd.conf > $workdir/nfd.conf"
 
 # get keys
 echo "getting keys..."