BIND 9 and TTLs

[Mr. James W. Laferriere]

	Hello All ,  Seeing all the TTL discussion going by has kicked
	up a question .  Is there a document that describes the Best
	Common Practice values for the various TTL fields ?  Tia ,  JimL

On Wed, 20 Sep 2000, Kevin Darcy wrote:
> The infamous "Brian" wrote:
> > Hi Kevin:
> > Kevin Darcy wrote in message <39C81160.38E379DB at daimlerchrysler.com>...
> > >The infamous "Brian" wrote:
> > >> If I place the <TTL> value in the RRs, no joy!
> > >_DNS_and_BIND_ 2nd Edition is somewhat outdated. RFC 2308
> > >clarified that the last field of the SOA record is the
> > >Negative Caching TTL, not the default or minimum TTL.
> > OK - good.
> > >That's why BIND 9 requires the presence of a $TTL directive
> > >(also specified in RFC 2308), or an explicit TTL on the *first*
> > >record in the zone file; otherwise it doesn't know what TTL to
> > >use for the record(s). See doc/misc/migration, Section 2.1.
> > Read the migration DOC - that's what led to my attempts to place TTL
> > directives in the RRs. I even tried putting it in every RR in case that was
> > my problem.
> If you wish to forego the $TTL directive, you have to have an explicit TTL on
> the *first* RR in the zone file. The first RR in your zone file is the SOA RR.
> You don't have an explicit TTL on it. That's why it's failing. Once you have
> an explicit TTL on the first RR, I don't believe you need explicit TTL's on
> any of the others.
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       | James   W.   Laferriere | System  Techniques | Give me VMS     |
       | Network        Engineer | 25416      22nd So |  Give me Linux  |
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