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Secondary DNS Updates

 
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Fuad_1
Regular Advisor

Secondary DNS Updates

Hello,
I have done a change in primary DNS server, and the change was successfull. When I chaeck the secondary dns server, even I have done the same updates, but still the old IP address is resoleved instead of the new one!!!
Thanks.
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2 REPLIES 2
Matti_Kurkela
Honored Contributor
Solution

Re: Secondary DNS Updates

When you changed the primary DNS zone data file, did you increment the serial number of the zone?

The secondary server will check the serial number of the zone to find out whether the zone information has changed or not.

The serial number is located in the SOA record of the zone. A common practice is to set the number as YYYYMMDDVV to document the date of the last change. The last two digits (VV) are a version number, so you can make 100 separate changes in one day, if necessary.

However, the DNS servers interpret the serial number as just one big number, so the use of YYYYMMDDVV format is not mandatory. Just incrementing the serial number by 1 is enough to signal the secondary servers that some changes have been made.

MK
MK
Fuad_1
Regular Advisor

Re: Secondary DNS Updates

Thanks it works.
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