All things related to multicast

[Tom Pusateri <>]

We zero the dummy ip header and only fill in the source and group address.
This means the protocol type is 0 and there is no transport header.

Tom

In message 
<>
 you write:
>Section 4.10.3 (page 110) of draft-ietf-pim-sm-v2-new-07.txt says:
>
>"For (S,G) null Registers, the Multicast data packet portion
>contains only a dummy header with S as the source address, G as the
>destination address, and a data length of zero."
>
>Does the IP protocol type of the dummy header need to be UDP?  Is this dummy 
>h
>eader
>supposed to be just an IP header, or does it include a transport layer 
>header 
>too? 
>How do Cisco and Juniper behave in this regard?
>
>Thanks!
>
>-- 
>Charles R. Anderson
>Network Engineer
>Computing and Communications Center
>Worcester Polytechnic Institute
>