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

[Andras Salamon <andras@dns.net>]

On Tue, Dec 27, 2005 at 07:20:29PM +0000, Paul Vixie wrote:
> # > 7.2 Dead / Unreachable Server (OPTIONAL)
> # 
> # The PowerDNS recursor reserves the right to tune its server selection
> # process regardless of this RFC.
> 
> that's probably why it says "OPTIONAL".

Yes, but the section also uses "MUST".  If a "MUST" is optional, it is
better written as "SHOULD".

-- Andras Salamon                   andras@dns.net

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