diff -ru igmpproxy-0.1.orig/src/rttable.c igmpproxy-0.1/src/rttable.c
--- igmpproxy-0.1.orig/src/rttable.c	2009-05-13 12:43:18.000000000 -0700
+++ igmpproxy-0.1/src/rttable.c	2015-07-28 07:52:36.726697304 -0700
@@ -198,6 +198,16 @@
     return NULL;
 }
 
+#define GF_MASK		0xFF000000
+#define GF_VALUE	0xE1000000	/* 225.x.x.x */
+
+/**
+ * Check if multicast group is 225.x.x.x
+ */
+static int gfiberVideo(uint32_t group) {
+	return	(group & GF_MASK) == GF_VALUE;
+}
+
 /**
 *   Adds a specified route to the routingtable.
 *   If the route already exists, the existing route 
@@ -214,6 +224,12 @@
             inetFmt(group, s1));
         return 0;
     }
+
+    if( ! gfiberVideo( ntohl(group) )) {
+        my_log(LOG_INFO, 0, "The group address %s is not a gfiber video channel, not inserted into the table.",
+            inetFmt(group, s1));
+        return 0;
+    }
 
     // Santiycheck the VIF index...
     //if(ifx < 0 || ifx >= MAX_MC_VIFS) {