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Re: question about PIM Null-Registers


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  • From: Tom Pusateri <>
  • To:
  • Subject: Re: question about PIM Null-Registers
  • Date: Mon, 19 May 2003 12:06:32 -0700
The TTL of the dummy ip header is not significant. It gets set to 0 when
we zero the dummy ip header and is ignored. The only two fields that
are significant in the dummy ip header are the source and destination
(group) ip address.

Tom

In message
<>
you write:
>On Thu, May 15, 2003 at 07:46:40PM -0700, Tom Pusateri wrote:
>pusateri> We zero the dummy ip header and only fill in the source and group
>ad
>dress.
>pusateri> This means the protocol type is 0 and there is no transport header.
>
>Thanks. What about the TTL of the encapsulated Null packet? Is that
>expected to be decremented once/twice like regular Register encapsulated
>packets? Do you set the TTL to zero, or something else?
>
>The pim draft isn't clear on these aspects.
>
>Thanks.
>
>--
>Charles R. Anderson
>Network Engineer
>Computing and Communications Center
>Worcester Polytechnic Institute
>


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