Re: [cobalt-users] DNS Propagation Question

[Jeff Lasman <jblists@xxxxxxxxxxxxx>]

Martin House wrote:

> I believe that the RAQ autoincrements (someone please correct me if I'm
> wrong).

The RaQs (at least the 2 and 3) do autoincrement.

> It might be worth checking the serial number on the SOA record from one of
> the servers on which this isn't propagating against the serial number on
> your primary. Some other servers check this value to see if the info they
> have is up to date.  The secondary DNS will check this value to see if it
> needs to update its info.
> 
> The SOA record can also tell you what the TTL values are at default for your
> domain.

Some DNS servers, especially at some of the large ISPs, appear to
completely ignore TTL.  For example,  aol (which strictly speaking,
isn't an ISP anyway <grin>).

And many mail-servers cache DNS based on their own time-frames, in
complete ignorance of TTL, and don't even bother to look for a new DNS
record until after their own cache-time has expired.

Jeff
-- 
Jeff Lasman <jblists@xxxxxxxxxxxxx>
nobaloney.net
P. O. Box 52672
Riverside, CA  92517
voice: (909) 787-8589  *  fax: (909) 782-0205