diff --git a/config.c b/config.c
index 374aee9..efa76f2 100644
--- a/config.c
+++ b/config.c
@@ -19,14 +19,16 @@
 #include <stdio.h>
 #include <string.h>
 #include "config.h"
+#include "ether.h"
 
 static void scan_line(char *s, struct config *cfg)
 {
 	double df;
-	int val;
+	int i, val;
 	Integer8 i8;
 	UInteger16 u16;
 	UInteger8 u8;
+	unsigned char mac[MAC_LEN];
 
 	struct defaultDS *dds = cfg->dds;
 	struct port_defaults *pod = cfg->pod;
@@ -99,6 +101,18 @@ static void scan_line(char *s, struct config *cfg)
 
 		if (df > 0.0 && df < 1.0)
 			*cfg->pi_integral_const = df;
+
+	} else if (MAC_LEN == sscanf(s, " ptp_dst_mac %hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
+			&mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5])) {
+
+		for (i = 0; i < MAC_LEN; i++)
+			cfg->ptp_dst_mac[i] = mac[i];
+
+	} else if (MAC_LEN == sscanf(s, " p2p_dst_mac %hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
+			&mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5])) {
+
+		for (i = 0; i < MAC_LEN; i++)
+			cfg->p2p_dst_mac[i] = mac[i];
 	}
 }
 
diff --git a/config.h b/config.h
index 0e69666..1c278f1 100644
--- a/config.h
+++ b/config.h
@@ -28,6 +28,8 @@ struct config {
 	int *tx_timestamp_retries;
 	double *pi_proportional_const;
 	double *pi_integral_const;
+	unsigned char *ptp_dst_mac;
+	unsigned char *p2p_dst_mac;
 };
 
 int config_read(char *name, struct config *cfg);
diff --git a/default.cfg b/default.cfg
index 701e7bd..b92c682 100644
--- a/default.cfg
+++ b/default.cfg
@@ -19,7 +19,12 @@ announceReceiptTimeout	3
 #
 # Run time options
 #
-transportSpecific	0x0
 tx_timestamp_retries	2
 pi_proportional_const	0.0
 pi_integral_const	0.0
+#
+# Transport options
+#
+transportSpecific	0x0
+ptp_dst_mac		01:1B:19:00:00:00
+p2p_dst_mac		01:80:C2:00:00:0E
diff --git a/ptp4l.c b/ptp4l.c
index 2a0387a..cb29eb3 100644
--- a/ptp4l.c
+++ b/ptp4l.c
@@ -32,6 +32,8 @@
 
 int sk_tx_retries = 2; /*see sk.c*/
 double configured_pi_kp, configured_pi_ki; /*see pi.c*/
+extern unsigned char ptp_dst_mac[]; /*see raw.c*/
+extern unsigned char p2p_dst_mac[]; /*see raw.c*/
 
 static int running = 1;
 static struct defaultDS ds;
@@ -219,6 +221,8 @@ int main(int argc, char *argv[])
 	cfg_settings.tx_timestamp_retries = &sk_tx_retries;
 	cfg_settings.pi_proportional_const = &configured_pi_kp;
 	cfg_settings.pi_integral_const = &configured_pi_ki;
+	cfg_settings.ptp_dst_mac = ptp_dst_mac;
+	cfg_settings.p2p_dst_mac = p2p_dst_mac;
 
 	if (config && config_read(config, &cfg_settings)) {
 		fprintf(stderr, "failed to read configuration file\n");
diff --git a/raw.c b/raw.c
index 5ea1e1c..4f53c49 100644
--- a/raw.c
+++ b/raw.c
@@ -138,8 +138,8 @@ static int raw_close(struct transport *t, struct fdarray *fda)
 	return 0;
 }
 
-static unsigned char ptp_dst_mac[MAC_LEN] = { PTP_DST_MAC };
-static unsigned char p2p_dst_mac[MAC_LEN] = { P2P_DST_MAC };
+unsigned char ptp_dst_mac[MAC_LEN] = { PTP_DST_MAC };
+unsigned char p2p_dst_mac[MAC_LEN] = { P2P_DST_MAC };
 
 static int open_socket(char *name, int event)
 {