Server 2003 DNS Scavenging david08 <david08.3k8yfq[ at ]DoNotSpam.com> 12/10/2008 7:15:04 PM I have a Server 2003 Domain Controller, running DHCP and DNS and I am trying to scavenge old PTR records and a few duplicate A records. My question is if my DHCP lease is for 12 hours, do I still leave the Scavenge settings to the default of 7 days for No Refresh, 7 days for Refresh and 7 Days for scavenge (main Server setting - not for zone) I get concerned due to the short lease duration for ip addresses and the 7 day No Refresh interval. My understanding is for the 'No Refresh' interval, no updates happen to change the timestamp only until after No Refresh ends then the records can be updated for the timestamp ( Refresh Interval). After those 7 days, then they become eligible to delete. I realize it's very important to not have the scavenging time to one day due to servers refresh the timestamps (records) once per 24 hours. I do not want to delete a server record that is not suppose too. Is 7 day default setting safe for server entries? Here is one article I read but it did not mention about lease duration differences. http://blogs.technet.com/networking/archive/2008/03/19/don-t-be-afraid-of-dns-scavenging-just-be-patient.aspx -- david08 ------------------------------------------------------------------------ david08's Profile: http://forums.techarena.in/members/david08.htm View this thread: http://forums.techarena.in/server-dns/1084750.htm http://forums.techarena.in

Re: Server 2003 DNS Scavenging Meinolf Weber [MVP-DS] <meiweb(nospam)[ at ]gmx.de> 12/11/2008 9:17:29 AM Hello david08, Instead of scavenging you can also do it this way: http://technet.microsoft.com/en-us/library/cc787034.aspx But it will work with 7 days, ofcourse some old entries will stay this time before cleaned up. 12 hours lease time is short, do your users move the machines a lot or work outsdide the office very often? Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties, and confers no rights. ** Please do NOT email, only reply to Newsgroups ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm [Quoted Text] > I have a Server 2003 Domain Controller, running DHCP and DNS and I am > trying to scavenge old PTR records and a few duplicate A records. My > question is if my DHCP lease is for 12 hours, do I still leave the > Scavenge settings to the default of 7 days for No Refresh, 7 days for > Refresh and 7 Days for scavenge (main Server setting - not for zone) I > get concerned due to the short lease duration for ip addresses and the > 7 day No Refresh interval. My understanding is for the 'No Refresh' > interval, no updates happen to change the timestamp only until after > No Refresh ends then the records can be updated for the timestamp ( > Refresh Interval). After those 7 days, then they become eligible to > delete. I realize it's very important to not have the scavenging time > to one day due to servers refresh the timestamps (records) once per 24 > hours. > > I do not want to delete a server record that is not suppose too. Is 7 > day default setting safe for server entries? > > Here is one article I read but it did not mention about lease duration > differences. > > http://blogs.technet.com/networking/archive/2008/03/19/don-t-be-afraid > -of-dns-scavenging-just-be-patient.aspx > > http://forums.techarena.in >

Re: Server 2003 DNS Scavenging david08 <david08.3k9nzb[ at ]DoNotSpam.com> 12/11/2008 5:26:41 PM That's what I have selected now. Under DHCP, DNS option-> Enable DNS dynamic updates according to the options below. I have Always dynamically update DNS A and PTR records. And 'Discard A and PTR records when lease is deleted. I still have mutiple PTR records for the same ip addresses. I know that if a system is no longer on the network it can't update the record (DHCP server because the owner is the missing computer) so thats when it creates a new record. But when scavenging is on, it can delete regardless of owner rights if timestamp is older than the no refresh time + refresh time + server time (whatever that part means?) -- david08 ------------------------------------------------------------------------ david08's Profile: http://forums.techarena.in/members/david08.htm View this thread: http://forums.techarena.in/server-dns/1084750.htm http://forums.techarena.in