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Thread: TTL in cahe does not reflect the TTL from the Master DNS

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TTL in cahe does not reflect the TTL from the Master DNS
"news.microsoft.com" <patrick.fourny[ at ]aclux.lu> 12.07.2007 13:26:48
Hi,

I have set a zone in our DNS server with a default TTL of 2 days. If i look
on the cached zone on other DNS servers, the record is still using the
default TTL of 24 hours (1 day) !!!
With the debug on, i can see that the TTL in the transmitted record is
effectively 2 days, but the cahed record still have a TTL of one 1 day ...

I've tried this on different w2k3 server with the same result.

Can someone explain this ?

Thanks in advance and regards,

Patrick


Re: TTL in cahe does not reflect the TTL from the Master DNS
"Kevin D. Goodknecht Sr. [MVP]" <admin[ at ]nospam.WFTX.US> 12.07.2007 14:00:04
Read inline please.

In news:unqdNhIxHHA.1484[ at ]TK2MSFTNGP06.phx.gbl,
news.microsoft.com <patrick.fourny[ at ]aclux.lu> typed:
[Quoted Text]
> Hi,
>
> I have set a zone in our DNS server with a default TTL of 2 days. If
> i look on the cached zone on other DNS servers, the record is still
> using the default TTL of 24 hours (1 day) !!!
> With the debug on, i can see that the TTL in the transmitted record is
> effectively 2 days, but the cahed record still have a TTL of one 1
> day ...
>
> I've tried this on different w2k3 server with the same result.
>
> Can someone explain this ?

The default maximum cached time on Windows DNS servers is 1 day. This is
adjustable with dnscmd in the registry.

Search this document for maxcachettl:
Description of DNS registry entries in Windows 2000 Server, part 2 of 3
http://support.microsoft.com/default.aspx?kbid=813963



--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
Hope This Helps

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Re: TTL in cahe does not reflect the TTL from the Master DNS
"P. Fourny" <patrick.fourny[ at ]aclux.lu> 13.07.2007 07:16:48
Hi Kevin,



Many thanks for the information. This resolved my problem.



Regards,



Patrick





"Kevin D. Goodknecht Sr. [MVP]" <admin[ at ]nospam.WFTX.US> a écrit dans le
message de news: uLCvzzIxHHA.3364[ at ]TK2MSFTNGP02.phx.gbl...
[Quoted Text]
> Read inline please.
>
> In news:unqdNhIxHHA.1484[ at ]TK2MSFTNGP06.phx.gbl,
> news.microsoft.com <patrick.fourny[ at ]aclux.lu> typed:
>> Hi,
>>
>> I have set a zone in our DNS server with a default TTL of 2 days. If
>> i look on the cached zone on other DNS servers, the record is still
>> using the default TTL of 24 hours (1 day) !!!
>> With the debug on, i can see that the TTL in the transmitted record is
>> effectively 2 days, but the cahed record still have a TTL of one 1
>> day ...
>>
>> I've tried this on different w2k3 server with the same result.
>>
>> Can someone explain this ?
>
> The default maximum cached time on Windows DNS servers is 1 day. This is
> adjustable with dnscmd in the registry.
>
> Search this document for maxcachettl:
> Description of DNS registry entries in Windows 2000 Server, part 2 of 3
> http://support.microsoft.com/default.aspx?kbid=813963
>
>
>
> --
> Best regards,
> Kevin D. Goodknecht Sr. [MVP]
> Hope This Helps
>
> ===================================
> When responding to posts, please "Reply to Group"
> via your newsreader so that others may learn and
> benefit from your issue, to respond directly to
> me remove the nospam. from my email address.
> ===================================
> http://www.lonestaramerica.com/
> http://support.wftx.us/
> http://message.wftx.us/
> ===================================
> Use Outlook Express?... Get OE_Quotefix:
> It will strip signature out and more
> http://home.in.tum.de/~jain/software/oe-quotefix/
> ===================================
> Keep a back up of your OE settings and folders
> with OEBackup:
> http://www.oehelp.com/OEBackup/Default.aspx
> ===================================
>
>


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