Delegation questions

Reindl Harald h.reindl at
Fri Aug 12 08:21:43 UTC 2016

Am 12.08.2016 um 07:32 schrieb Willmann, Robert:
> Kevin Darcy wrote:
>> In any case, multi-hop forwarding is always the least-preferred option.
> I wonder for which reason do you think this.
> Of course, any forwarding adds a additional hop and therefore additional delay and an additional possible point of failure.
> But this is true for any network-connection.
> So, what do you think are the DNS-specific downsides of forwarding?
> The only thing that comes to mind if I think about downsides of forwarding is that, if something goes wrong, the client only gets a generic SERVFAIL as errormessage instead of a specific explanation what exactly went wrong.
> Do you see other downsides to forwarding?

you get the lowest TTL in the whole chain and god beware none of the 
multi-hop forwarders have a cache hit so it makes it to the last in 
chain doing then recursion - it's a simple "worst case math"

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