--- zzzz-none-000/linux-4.1.38/net/ipv6/ndisc.c	2017-01-18 18:48:06.000000000 +0000
+++ bcm63-7582-715/linux-4.1.38/net/ipv6/ndisc.c	2020-11-25 10:06:48.000000000 +0000
@@ -982,8 +982,12 @@
 		return;
 	}
 
+#if defined(CONFIG_BCM_KF_IP)
+	if (!idev->cnf.forwarding  || (idev->dev->priv_flags & IFF_WANDEV))
+#else
 	/* Don't accept RS if we're not in router mode */
 	if (!idev->cnf.forwarding)
+#endif
 		goto out;
 
 	/*