I have serveral site that my web pages use that use dynamic IPs,
unfortunately, the cached lookups don't appear to be updating with the new
IPs and I am having to delete these addresses every few days. I assumed that
the scavenger setting would clear out this information and it would refresh
itself. How do I get the Cached Lookups to refresh on a regular basis?

thanks for your .

As far as I know you cannot pre-fetch the DNS cache. What you can do instead
is:
schedule a script/batch on your dns server(s) to clear their cache and
reload it. It would look like:
dnscmd /clearcache
nslookup mydynname1
nslookup mydynname2
....

Do not forget that clients also cache names (positively and maybe
negatively) so take care of clearing and relaoding client cach too.

Hope it s.

KR
Marc

Btw, I didn't get it as far as scavenging is concerned.

"Dee Freeland" <DeeFreeland@discussions.microsoft.com> wrote in message
news:0F5E8C43-7AB0-4194-B59D-562E119E7026@microsoft.com...
>I have serveral site that my web pages use that use dynamic IPs,
> unfortunately, the cached lookups don't appear to be updating with the new
> IPs and I am having to delete these addresses every few days. I assumed
> that
> the scavenger setting would clear out this information and it would
> refresh
> itself. How do I get the Cached Lookups to refresh on a regular basis?
>
> thanks for your .

Marc:

I am looking to update the cache on my DNS server. There is no way to
refresh this information, I have to clear the cache? There are some entries
that are fine, just a few that have dynamic addresses.

"Lognoul, Marc [Private]" wrote:

> As far as I know you cannot pre-fetch the DNS cache. What you can do instead
> is:
> schedule a script/batch on your dns server(s) to clear their cache and
> reload it. It would look like:
> dnscmd /clearcache
> nslookup mydynname1
> nslookup mydynname2
> ....
>
> Do not forget that clients also cache names (positively and maybe
> negatively) so take care of clearing and relaoding client cach too.
>
> Hope it s.
>
> KR
> Marc
>
> Btw, I didn't get it as far as scavenging is concerned.
>
> "Dee Freeland" <DeeFreeland@discussions.microsoft.com> wrote in message
> news:0F5E8C43-7AB0-4194-B59D-562E119E7026@microsoft.com...
> >I have serveral site that my web pages use that use dynamic IPs,
> > unfortunately, the cached lookups don't appear to be updating with the new
> > IPs and I am having to delete these addresses every few days. I assumed
> > that
> > the scavenger setting would clear out this information and it would
> > refresh
> > itself. How do I get the Cached Lookups to refresh on a regular basis?
> >
> > thanks for your .
>
>

I am not aware of any method that could you doing this unless you can
control the the records (A or CNAME) and then change their TTL.
I don't think playing arounf with the DNS server cache file would be either
supported or efficient.

--
KR/Amicalement/MVG,
Marc



"Dee Freeland" <DeeFreeland@discussions.microsoft.com> wrote in message
news:47E33F2D-1AC4-4A53-A7CC-A4EAC33FF7F8@microsoft.com...
> Marc:
>
> I am looking to update the cache on my DNS server. There is no way to
> refresh this information, I have to clear the cache? There are some
> entries
> that are fine, just a few that have dynamic addresses.
>
> "Lognoul, Marc [Private]" wrote:
>
>> As far as I know you cannot pre-fetch the DNS cache. What you can do
>> instead
>> is:
>> schedule a script/batch on your dns server(s) to clear their cache and
>> reload it. It would look like:
>> dnscmd /clearcache
>> nslookup mydynname1
>> nslookup mydynname2
>> ....
>>
>> Do not forget that clients also cache names (positively and maybe
>> negatively) so take care of clearing and relaoding client cach too.
>>
>> Hope it s.
>>
>> KR
>> Marc
>>
>> Btw, I didn't get it as far as scavenging is concerned.
>>
>> "Dee Freeland" <DeeFreeland@discussions.microsoft.com> wrote in message
>> news:0F5E8C43-7AB0-4194-B59D-562E119E7026@microsoft.com...
>> >I have serveral site that my web pages use that use dynamic IPs,
>> > unfortunately, the cached lookups don't appear to be updating with the
>> > new
>> > IPs and I am having to delete these addresses every few days. I assumed
>> > that
>> > the scavenger setting would clear out this information and it would
>> > refresh
>> > itself. How do I get the Cached Lookups to refresh on a regular basis?
>> >
>> > thanks for your .
>>
>>

Thanks for the response.

"Lognoul, Marc [Private]" wrote:

> I am not aware of any method that could you doing this unless you can
> control the the records (A or CNAME) and then change their TTL.
> I don't think playing arounf with the DNS server cache file would be either
> supported or efficient.
>
> --
> KR/Amicalement/MVG,
> Marc
>
>
>
> "Dee Freeland" <DeeFreeland@discussions.microsoft.com> wrote in message
> news:47E33F2D-1AC4-4A53-A7CC-A4EAC33FF7F8@microsoft.com...
> > Marc:
> >
> > I am looking to update the cache on my DNS server. There is no way to
> > refresh this information, I have to clear the cache? There are some
> > entries
> > that are fine, just a few that have dynamic addresses.
> >
> > "Lognoul, Marc [Private]" wrote:
> >
> >> As far as I know you cannot pre-fetch the DNS cache. What you can do
> >> instead
> >> is:
> >> schedule a script/batch on your dns server(s) to clear their cache and
> >> reload it. It would look like:
> >> dnscmd /clearcache
> >> nslookup mydynname1
> >> nslookup mydynname2
> >> ....
> >>
> >> Do not forget that clients also cache names (positively and maybe
> >> negatively) so take care of clearing and relaoding client cach too.
> >>
> >> Hope it s.
> >>
> >> KR
> >> Marc
> >>
> >> Btw, I didn't get it as far as scavenging is concerned.
> >>
> >> "Dee Freeland" <DeeFreeland@discussions.microsoft.com> wrote in message
> >> news:0F5E8C43-7AB0-4194-B59D-562E119E7026@microsoft.com...
> >> >I have serveral site that my web pages use that use dynamic IPs,
> >> > unfortunately, the cached lookups don't appear to be updating with the
> >> > new
> >> > IPs and I am having to delete these addresses every few days. I assumed
> >> > that
> >> > the scavenger setting would clear out this information and it would
> >> > refresh
> >> > itself. How do I get the Cached Lookups to refresh on a regular basis?
> >> >
> >> > thanks for your .
> >>
> >>
>

Read inline please.

In news:0F5E8C43-7AB0-4194-B59D-562E119E7026@microsoft.com,
Dee Freeland <DeeFreeland@discussions.microsoft.com> typed:
> I have serveral site that my web pages use that use dynamic IPs,
> unfortunately, the cached lookups don't appear to be updating with
> the new IPs and I am having to delete these addresses every few days.
> I assumed that the scavenger setting would clear out this information
> and it would refresh itself. How do I get the Cached Lookups to
> refresh on a regular basis?
>
> thanks for your .

If the Web site is on a hosting provider using dynamic IPs, and the cached
records are the problem, you need to contact the hosting provider about
reducing the TTL for the records. Records are only held in cache until the
remaining Ttl has expired. Most hosting providers using dynamic IPs on web
sites, will have a ttl that is low enough that the site could only be down a
few seconds. I've seen web host that use TTl of 15 to 20 seconds, this would
be the longest period the records could be cached.

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

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