Re: [Question] What is an accurate meaning of "A server MAY cache a dead server indication"?

[bert hubert <bert.hubert@netherlabs.nl>]

On Mon, Dec 26, 2005 at 08:05:06PM +0900, Hideshi Enokihara wrote:
> 7.2 Dead / Unreachable Server (OPTIONAL)
(...)

>    A server MAY cache a dead server indication.  If it does so it MUST
>    NOT be deemed dead for longer than five (5) minutes.  The indication
>    MUST be stored against query tuple <query name, type, class, server
>    IP address> unless there was a transport layer indication that the
>    server does not exist, in which case it applies to all queries to
>    that specific IP address.

For what it's worth, I consider this section to be meddling. It turns out
differing 'dead/unreachable' strategies have differing merits, this should
not be set in stone.

I missed the standardisation process, but maybe somebody cares.

The PowerDNS recursor reserves the right to tune its server selection
process regardless of this RFC.

-- 
http://www.PowerDNS.com      Open source, database driven DNS Software 
http://netherlabs.nl              Open and Closed source services

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