[ntp:questions] multicast - TTL

David L. Mills mills at udel.edu
Wed Feb 21 15:06:06 UTC 2007


Martin,

The descrete values used for the TTL is consistent with the 
administrative scoping rules spelled out in the RFC cited in the 
documentation.

Dave

Martin wrote:
> wa6zvp wrote:
> 
>>The quick answer is to put this in your config file:
>>
>>ttl 0 1 2 3 4 5 6 7
>>
>>This creates a one-to-one mapping for ttl.
> 
> Roger, thank you for solving the issue.
> 
> I've read the discussion you mentioned. It looks to me that unless overridden
> with the ttl command like the one above, the whole TTL range 0-255 is reduced
> to just 8 values: 0,32,64, ... 224. The ttl option to the broadcast command is
> then not the real TTL value, but an index selecting one from those 8 values.
> 
> It probably causes no harm to use incorrect (larger) TTL, but this feature 
> could be better documented, IMHO.
> 
> Thank you
> 
> 	Martin
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