On 01/12/2012 06:15 PM, Adamiec, Lawrence wrote:
So when does recursion occur, before the query is forwarded or never? I
thought recursion was supposed to go looking for the answers. If
recursion does not return an answer then does the query get forwarded?
"forwarders" IIRC works as follows:
1. If query answer in cache, reply from cache to client, stop
2. Send query to forwarders
3. If reply, add to cache, reply to client, stop
4. No reply: if "forward only" set, error to client, stop
5. Perform normal recursion
That is - it tries cache, then the forwarders, then does recursion
itself (unless "forward only" is set).
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