---------- Forwarded message ---------- From: "Nick" To: Date: Thu, 19 Jan 2006 15:00:17 +0900 Subject: Re: IE LAB 8 vol1 -Multicast helper map Vs DOC CD Hi!! Quoted from the DOC ## Router A-First Hop Router Configuration interface ethernet 0 ip directed-broadcast --> You don't need this since the broadcast traffic is routed just like unicast traffic. ip multicast helper-map broadcast 224.5.5.5 120 ip pim dense-mode ! access-list 120 permit any any udp 4000 access-list 120 deny any any udp --> You don't need this since the ACL has an impmlicit deny at the end. ip forward-protocol udp 4000 ## Router C-Last Hop Router Configuration interface ethernet 1 --> If you see Fig.13 this is the input interface. ip directed-broadcast --> You don't need this on this interface. ip multicast helper-map 224.5.5.5 178.21.34.255 135 ip pim dense-mode ! access-list 135 permit any any udp 4000 access-list 135 deny any any udp --> You don't this either. ip forward-protocol udp 4000 PLUS!! interface ethernet 0 description LAN ip address 178.21.34.1 255.255.255.0 ip directed-broadcast --> You need this for the previously translated directed broadcast to be exploded on to the LAN. HTH Nick ---