diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index 664b9ecaf228..e3b3cdef3170 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -27,6 +27,7 @@ INTERFACE_TIMEOUT=${INTERFACE_TIMEOUT:=600}
 LOW_AGEING_TIME=${LOW_AGEING_TIME:=1000}
 REQUIRE_JQ=${REQUIRE_JQ:=yes}
 REQUIRE_MZ=${REQUIRE_MZ:=yes}
+STABLE_MAC_ADDRS=${STABLE_MAC_ADDRS:=no}
 
 relative_path="${BASH_SOURCE%/*}"
 if [[ "$relative_path" == "${BASH_SOURCE}" ]]; then
@@ -214,10 +215,41 @@ create_netif()
 	esac
 }
 
+declare -A MAC_ADDR_ORIG
+mac_addr_prepare()
+{
+	local new_addr=
+	local dev=
+
+	for ((i = 1; i <= NUM_NETIFS; ++i)); do
+		dev=${NETIFS[p$i]}
+		new_addr=$(printf "00:01:02:03:04:%02x" $i)
+
+		MAC_ADDR_ORIG["$dev"]=$(ip -j link show dev $dev | jq -e '.[].address')
+		# Strip quotes
+		MAC_ADDR_ORIG["$dev"]=${MAC_ADDR_ORIG["$dev"]//\"/}
+		ip link set dev $dev address $new_addr
+	done
+}
+
+mac_addr_restore()
+{
+	local dev=
+
+	for ((i = 1; i <= NUM_NETIFS; ++i)); do
+		dev=${NETIFS[p$i]}
+		ip link set dev $dev address ${MAC_ADDR_ORIG["$dev"]}
+	done
+}
+
 if [[ "$NETIF_CREATE" = "yes" ]]; then
 	create_netif
 fi
 
+if [[ "$STABLE_MAC_ADDRS" = "yes" ]]; then
+	mac_addr_prepare
+fi
+
 for ((i = 1; i <= NUM_NETIFS; ++i)); do
 	ip link show dev ${NETIFS[p$i]} &> /dev/null
 	if [[ $? -ne 0 ]]; then
@@ -503,6 +535,10 @@ pre_cleanup()
 		echo "Pausing before cleanup, hit any key to continue"
 		read
 	fi
+
+	if [[ "$STABLE_MAC_ADDRS" = "yes" ]]; then
+		mac_addr_restore
+	fi
 }
 
 vrf_prepare()