[aprssig] Ideal Digipeater Behavior
John Langner WB2OSZ
wb2osz at comcast.net
Thu Aug 25 07:24:53 CDT 2016
Thanks for trying to clarify this.
Just a couple quick observations. It will take longer to go through all of
> All digipeaters must implement 30 second duplicate suppression. No
> may transmit the same (source address, information field) twice in any 30
> second window.
Duplicate suppression is based on source address, destination address, and
information field. In other words, everything other than the via path
which changes along the way.
> # The WIDE1-1 alias gets replaced with LOWDIG-1 and is marked as used
> TRACKR-5>APZTST,WIDE1-1 ->
"Replace" when hop count is used up (i.e. -n has been decremented down to
zero). "Insert" own call when hops remain.
Some implementations will both insert their own call and leave the used up
alias to produce this:
This is confusing and ambiguous. It looks like the packet was digipeated
twice. Once by a digipeater that implements tracing (inserting its own
callsign) and again by another digipeater which did not identify itself.
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