There is obviously something about ip helper I do not understand. Perhaps someone could explain.
My understanding is that when ip helper 192.168.1.2 is placed on an interface it will forward the following upd brodcasts to the address specified:
TFTP (69) DNS(53) Time(37) Netbios name Service (137) Netbios Datagram (138) Bootp Server (67) Bootp Client (68) TACAS (49)
I did not think that dns or tftp, for example, are broadcasts. Could someone explain what a dns broacast is? In both dns and tftp the client specifies an ip address. doesn't that make them unicast?