[dns-wg] Updating RIPE 203

Hello Paul,

Paul Hoffman writes:

> On 11 Aug 2017, at 5:40, Carsten Strotmann wrote:
>
>> The original SOA values for RIPE 203:
>>
>> example.com.  3600  SOA  dns.example.com. hostmaster.example.com. (
>>                          1999022301   ; serial YYYYMMDDnn
>>                          86400        ; refresh (  24 hours)
>>                          7200         ; retry   (   2 hours)
>>                          3600000      ; expire  (1000 hours)
>>                          172800 )     ; minimum (   2 days)
>>
>> the new proposed and updated values
>>
>> $TTL 3600
>> example.com.  3600  SOA  dns.example.com. hostmaster.example.com. (
>>                          2017080101   ; serial YYYYMMDDnn
>>                          7200         ; refresh              (   2 
>> hours)
>>                          1800         ; retry                (  30 
>> minutes)
>>                          3600000      ; expire               (1000 
>> hours)
>>                          3600 )       ; minimum/negative TTL (   1 
>> hour)
>>
>
> The new values seem fine, and should not cause strain to an 
> authoritative server unless the zone's number of NXDOMAIN queries is 
> massively mis-matched with the capabilities of the server.
>
> Dropping the retry value down further seems reasonable, maybe to 5 
> minutes. You always want your secondaries to have fresh data. If you 
> have secondaries that are having problems contacting you, you have an 
> operational problem. Maybe add some text to the new version explaining 
> why this number is lower and suggesting that the watch the logs on their 
> secondaries for failures to refresh.

We'll consider this. Care must be taken that once a server is not
reachable because of too much traffic, a too low RETRY value might make
things worse. But I agree it is preferrable to have fast recovery.

>
> The idea of matching the negative TTL to the SOA TTL makes good sense, 
> and certainly is better than having a huge negative TTL.
>
> Adding the "$TTL 3600" is a great addition. If you can add text about 
> the semantic differences between the three 3600 values, that would be 
> very useful.
>

Yes, good point, I will write some info about the different TTL values
in the document.

Best regards

Carsten Strotmann