--- ppp-2.4.4/pppd/plugins/rp-pppoe/if.c.normal	2007-06-25 11:07:38 +0200
+++ ppp-2.4.4/pppd/plugins/rp-pppoe/if.c	2007-06-25 11:07:40 +0200
@@ -125,9 +125,14 @@
 UINT16_t
 etherType(PPPoEPacket *packet)
 {
+    static int logged;
+
     UINT16_t type = (UINT16_t) ntohs(packet->ethHdr.h_proto);
-    if (type != Eth_PPPOE_Discovery && type != Eth_PPPOE_Session) {
-	syslog(LOG_ERR, "Invalid ether type 0x%x", type);
+    if (!logged && type != Eth_PPPOE_Discovery && type != Eth_PPPOE_Session) {
+	if (type == 0x0800 || type == 0x0806) {
+	    syslog(LOG_WARNING, "IP traffic detected on this interface (type 0x%x)", type);
+	    logged++;
+	}
     }
     return type;
 }