DNS propagation

[Chris]

<unix at edify.com> wrote in message news:d427iq$11g9$1 at sf1.isc.org...
> Hi
>   I am running my primary DNS using BIND 8.1. This weekend, I am swapping
> name, IP address, and role with that of Win 2003 DNS (secy). I would like
> these changes to be propagated as quickly as possible to the outside 
> world.
> I am presuming that by lowering my TTL, I can ensure this can happen. My 
> SOA
> is below. Can someone please advise me how much low can my TTL be?. TIA 
> for
> your time.
>
> $TTL    86400
> @       IN      SOA     mydns.mydomain.com. root.mydomain.com. (
>                        2005041801 ; Serial YYYYMMDD01
>                        8000       ; Refresh
>                        3000       ; Retry
>                        1500000    ; Expire
>                        86400 )    ; Minimum TTL
> ;
> Ragu
>
>

I normally drop it to 900 a few days before a planned change.

Chris.