diff -up dhcp-4.1.1/client/clparse.c.anycast dhcp-4.1.1/client/clparse.c
--- dhcp-4.1.1/client/clparse.c.anycast	2010-01-20 17:19:37.000000000 +0100
+++ dhcp-4.1.1/client/clparse.c	2010-01-20 17:19:37.000000000 +0100
@@ -571,6 +571,17 @@ void parse_client_statement (cfile, ip, 
 		}
 		return;
 
+	      case ANYCAST_MAC:
+		token = next_token (&val, (unsigned *)0, cfile);
+		if (ip) {
+			parse_hardware_param (cfile, &ip -> anycast_mac_addr);
+		} else {
+			parse_warn (cfile, "anycast mac address parameter %s",
+			            "not allowed here.");
+			skip_to_semi (cfile);
+		}
+		return;
+
 	      case REQUEST:
 		token = next_token (&val, (unsigned *)0, cfile);
 		if (config -> requested_options == default_requested_options)
diff -up dhcp-4.1.1/common/conflex.c.anycast dhcp-4.1.1/common/conflex.c
--- dhcp-4.1.1/common/conflex.c.anycast	2010-01-20 17:19:37.000000000 +0100
+++ dhcp-4.1.1/common/conflex.c	2010-01-20 17:19:37.000000000 +0100
@@ -729,6 +729,8 @@ intern(char *atom, enum dhcp_token dfv) 
 		}
 		if (!strcasecmp (atom + 1, "nd"))
 			return AND;
+		if (!strcasecmp (atom + 1, "nycast-mac"))
+			return ANYCAST_MAC;
 		if (!strcasecmp (atom + 1, "ppend"))
 			return APPEND;
 		if (!strcasecmp (atom + 1, "llow"))
diff -up dhcp-4.1.1/common/lpf.c.anycast dhcp-4.1.1/common/lpf.c
--- dhcp-4.1.1/common/lpf.c.anycast	2010-01-20 17:19:37.000000000 +0100
+++ dhcp-4.1.1/common/lpf.c	2010-01-20 17:19:37.000000000 +0100
@@ -334,6 +334,9 @@ ssize_t send_packet (interface, packet, 
 		return send_fallback (interface, packet, raw,
 				      len, from, to, hto);
 
+	if (hto == NULL && interface->anycast_mac_addr.hlen)
+		hto = &interface->anycast_mac_addr;
+
 	/* Assemble the headers... */
 	assemble_hw_header (interface, (unsigned char *)hh, &hbufp, hto);
 	fudge = hbufp % 4;	/* IP header must be word-aligned. */
diff -up dhcp-4.1.1/includes/dhcpd.h.anycast dhcp-4.1.1/includes/dhcpd.h
--- dhcp-4.1.1/includes/dhcpd.h.anycast	2010-01-20 17:19:37.000000000 +0100
+++ dhcp-4.1.1/includes/dhcpd.h	2010-01-20 17:19:37.000000000 +0100
@@ -1217,6 +1217,7 @@ struct interface_info {
 	int dlpi_sap_length;
 	struct hardware dlpi_broadcast_addr;
 # endif /* DLPI_SEND || DLPI_RECEIVE */
+	struct hardware anycast_mac_addr;
 };
 
 struct hardware_link {
diff -up dhcp-4.1.1/includes/dhctoken.h.anycast dhcp-4.1.1/includes/dhctoken.h
--- dhcp-4.1.1/includes/dhctoken.h.anycast	2010-01-20 17:19:37.000000000 +0100
+++ dhcp-4.1.1/includes/dhctoken.h	2010-01-20 17:19:37.000000000 +0100
@@ -354,7 +354,8 @@ enum dhcp_token {
 	PREFIX6 = 657,
 	FIXED_PREFIX6 = 658,
 	BOOTP_BROADCAST_ALWAYS = 659,
-	CONFLICT_DONE = 660
+	CONFLICT_DONE = 660,
+	ANYCAST_MAC = 661
 };
 
 #define is_identifier(x)	((x) >= FIRST_TOKEN &&	\