You can now say "mode multicast".

proto/rip/config.Y

@@ -25,7 +25,7 @@ CF_DEFINES
 CF_DECLS
 
 CF_KEYWORDS(RIP, INFINITY, METRIC, PORT, PERIOD, GARBAGETIME, PASSWORDS,
-	    MODE, BROADCAST, QUIET, NOLISTEN, VERSION1, 
+	    MODE, BROADCAST, MULTICAST, QUIET, NOLISTEN, VERSION1, 
 	    AUTHENTICATION, NONE, PLAINTEXT, MD5,
 	    HONOR, NEVER, NEIGHBOR, ALWAYS,
 	    RIP_METRIC, RIP_TAG)
@@ -65,6 +65,7 @@ rip_auth:
 
 rip_mode: 
     BROADCAST { $$=IM_BROADCAST; }
+  | MULTICAST { $$=0; }
   | QUIET     { $$=IM_QUIET; }
   | NOLISTEN  { $$=IM_NOLISTEN; }
   | VERSION1  { $$=IM_VERSION1 | IM_BROADCAST; }