diff --git a/tests/net/net/t_forwarding.sh b/tests/net/net/t_forwarding.sh
index af3d602..9315f11 100644
--- a/tests/net/net/t_forwarding.sh
+++ b/tests/net/net/t_forwarding.sh
@@ -31,6 +31,9 @@ inet6server="rump_server -lrumpnet -lrumpnet_net -lrumpnet_netinet -lrumpnet_net
 SOCKSRC=unix://commsock1
 SOCKFWD=unix://commsock2
 SOCKDST=unix://commsock3
+LOGSRC=./log1
+LOGFWD=./log2
+LOGDST=./log3
 IP4SRC=10.0.1.2
 IP4SRCGW=10.0.1.1
 IP4DSTGW=10.0.2.1
@@ -135,9 +138,15 @@ setup_forwarder()
 
 setup()
 {
-	atf_check -s exit:0 ${inetserver} $SOCKSRC
-	atf_check -s exit:0 ${inetserver} $SOCKFWD
-	atf_check -s exit:0 ${inetserver} $SOCKDST
+	if $DEBUG; then
+		atf_check -s exit:0 ${inetserver} -L $LOGSRC $SOCKSRC
+		atf_check -s exit:0 ${inetserver} -L $LOGFWD $SOCKFWD
+		atf_check -s exit:0 ${inetserver} -L $LOGDST $SOCKDST
+	else
+		atf_check -s exit:0 ${inetserver} $SOCKSRC
+		atf_check -s exit:0 ${inetserver} $SOCKFWD
+		atf_check -s exit:0 ${inetserver} $SOCKDST
+	fi
 
 	setup_endpoint $SOCKSRC $IP4SRC bus1 ipv4 $IP4SRCGW
 	setup_endpoint $SOCKDST $IP4DST bus2 ipv4 $IP4DSTGW
@@ -248,6 +257,15 @@ dump()
 
 	/usr/bin/shmif_dumpbus -p - bus1 2>/dev/null| /usr/sbin/tcpdump -n -e -r -
 	/usr/bin/shmif_dumpbus -p - bus2 2>/dev/null| /usr/sbin/tcpdump -n -e -r -
+
+	if $DEBUG; then
+		echo "--- kernel logs for src"
+		cat $LOGSRC
+		echo "--- kernel logs for fwd"
+		cat $LOGFWD
+		echo "--- kernel logs for dst"
+		cat $LOGDST
+	fi
 }
 
 test_ping_failure()