diff -ur v2.6.2/linux/Documentation/networking/ip-sysctl.txt linux/Documentation/networking/ip-sysctl.txt
--- v2.6.2/linux/Documentation/networking/ip-sysctl.txt	2004-02-05 00:23:10.000000000 +0200
+++ linux/Documentation/networking/ip-sysctl.txt	2004-02-08 11:35:04.617310560 +0200
@@ -486,6 +486,21 @@
 	conf/{all,interface}/arp_filter is set to TRUE,
 	it will be disabled otherwise
 
+arp_announce - INTEGER
+	Define different restriction levels for announcing the local
+	source IP address from IP packets in ARP requests sent on
+	interface:
+	0 - (default) Use any local address, configured on any interface
+	1 - Try to avoid local addresses that are not in the target's
+	subnet for this interface
+	2 - Always use the best source address for this target
+
+	The max value from conf/{all,interface}/arp_announce is used.
+
+	Increasing the restriction level gives more chance for
+	receiving answer from the resolved target while decreasing
+	the level announces more valid sender's information.
+
 tag - INTEGER
 	Allows you to write a number, which can be used as required.
 	Default value is 0.
diff -ur v2.6.2/linux/include/linux/inetdevice.h linux/include/linux/inetdevice.h
--- v2.6.2/linux/include/linux/inetdevice.h	2003-08-23 19:42:33.000000000 +0300
+++ linux/include/linux/inetdevice.h	2004-02-07 17:57:38.000000000 +0200
@@ -18,6 +18,7 @@
 	int	mc_forwarding;
 	int	tag;
 	int     arp_filter;
+	int	arp_announce;
 	int	medium_id;
 	int	no_xfrm;
 	int	no_policy;
@@ -70,6 +71,7 @@
 	  (ipv4_devconf.accept_redirects || (in_dev)->cnf.accept_redirects)))
 
 #define IN_DEV_ARPFILTER(in_dev)	(ipv4_devconf.arp_filter || (in_dev)->cnf.arp_filter)
+#define IN_DEV_ARP_ANNOUNCE(in_dev)	(max(ipv4_devconf.arp_announce, (in_dev)->cnf.arp_announce))
 
 struct in_ifaddr
 {
diff -ur v2.6.2/linux/include/linux/sysctl.h linux/include/linux/sysctl.h
--- v2.6.2/linux/include/linux/sysctl.h	2004-02-05 00:23:17.000000000 +0200
+++ linux/include/linux/sysctl.h	2004-02-07 18:01:58.000000000 +0200
@@ -360,6 +360,7 @@
 	NET_IPV4_CONF_MEDIUM_ID=14,
 	NET_IPV4_CONF_NOXFRM=15,
 	NET_IPV4_CONF_NOPOLICY=16,
+	NET_IPV4_CONF_ARP_ANNOUNCE=17,
 };
 
 /* /proc/sys/net/ipv4/netfilter */
diff -ur v2.6.2/linux/net/ipv4/arp.c linux/net/ipv4/arp.c
--- v2.6.2/linux/net/ipv4/arp.c	2004-02-05 00:23:18.000000000 +0200
+++ linux/net/ipv4/arp.c	2004-02-08 11:37:24.551037400 +0200
@@ -321,15 +321,57 @@
 
 static void arp_solicit(struct neighbour *neigh, struct sk_buff *skb)
 {
-	u32 saddr;
+	u32 saddr = 0;
 	u8  *dst_ha = NULL;
 	struct net_device *dev = neigh->dev;
 	u32 target = *(u32*)neigh->primary_key;
 	int probes = atomic_read(&neigh->probes);
+	struct rtable *rt;
+	struct in_device *in_dev = in_dev_get(dev);
 
-	if (skb && inet_addr_type(skb->nh.iph->saddr) == RTN_LOCAL)
+	if (!in_dev)
+		return;
+
+	switch (IN_DEV_ARP_ANNOUNCE(in_dev)) {
+	default:
+	case 0:		/* By default announce any local IP */
+		if (skb && inet_addr_type(skb->nh.iph->saddr) == RTN_LOCAL)
+			saddr = skb->nh.iph->saddr;
+		break;
+	case 1:		/* Restrict announcements of saddr in same subnet */
+		if (!skb || !(rt = (struct rtable *) skb->dst) || rt->fl.iif)
+			break;
 		saddr = skb->nh.iph->saddr;
-	else
+		/* rt_src is always a local address */
+		if (saddr == rt->rt_src || inet_addr_type(saddr) == RTN_LOCAL) {
+			/* saddr should be known to target */
+			if (inet_addr_onlink(in_dev, target, saddr))
+				break;
+		}
+		saddr = 0;
+		break;
+	case 2:		/* Avoid secondary IPs, get a primary/preferred one */
+#if 0
+		{
+			struct flowi fl = {
+				.nl_u = { .ip4_u = { .daddr = target } },
+				.oif = dev->ifindex };
+
+			in_dev_put(in_dev);
+			in_dev = NULL;
+			if (ip_route_output_key(&rt, &fl) < 0)
+				return;
+			saddr = rt->rt_src;
+			ip_rt_put(rt);
+		}
+#endif
+
+		break;
+	}
+
+	if (in_dev)
+		in_dev_put(in_dev);
+	if (!saddr)
 		saddr = inet_select_addr(dev, target, RT_SCOPE_LINK);
 
 	if ((probes -= neigh->parms->ucast_probes) < 0) {
diff -ur v2.6.2/linux/net/ipv4/devinet.c linux/net/ipv4/devinet.c
--- v2.6.2/linux/net/ipv4/devinet.c	2004-02-05 00:23:18.000000000 +0200
+++ linux/net/ipv4/devinet.c	2004-02-07 18:03:04.000000000 +0200
@@ -1132,7 +1132,7 @@
 
 static struct devinet_sysctl_table {
 	struct ctl_table_header *sysctl_header;
-	ctl_table		devinet_vars[17];
+	ctl_table		devinet_vars[18];
 	ctl_table		devinet_dev[2];
 	ctl_table		devinet_conf_dir[2];
 	ctl_table		devinet_proto_dir[2];
@@ -1252,6 +1252,14 @@
 			.proc_handler	= &proc_dointvec,
 		},
 		{
+			.ctl_name	= NET_IPV4_CONF_ARP_ANNOUNCE,
+			.procname	= "arp_announce",
+			.data		= &ipv4_devconf.arp_announce,
+			.maxlen		= sizeof(int),
+			.mode		= 0644,
+			.proc_handler	= &proc_dointvec,
+		},
+		{
 			.ctl_name	= NET_IPV4_CONF_NOXFRM,
 			.procname	= "disable_xfrm",
 			.data		= &ipv4_devconf.no_xfrm,