When DDNS is working properly it's wonderful, but when it fails it can sometimes turn into a major pain to troubleshoot.
If you're not familiar with how DDNS and AD work together, you may not realize just how many moving parts there are with this product (check out Understanding Dynamic Update from Technet to learn more).
I am running a Windows 2008 R2 domain with Active Directory integrated DNS.
All users have laptops and frequently switch from wired to wireless connections (these are on separate VLAN's).
Let me know if you need any further information Ok Great.
Microsoft Dynamic DNS (DDNS) is a wonderful feature.
I performed a cold boot of my machine and obtained a wired DHCP address.I noticed this morning that I now have 2 entries in DNS for most of the machines that switch between wireless and wired connections. Earlier today I reverted the scavenging times to no-refresh 4 hours, refresh 8 hours.OK Every half hour the lease will try to renew by machines itself Because generally client will try renewal after half lease time elapsed Now Even if you keep No refresh (1 HR) refresh (2 HRS) = 3 HRS, scavenging will run every 3 HRS and it will delete records older than 3 HRS Most of the records are updated every half an hour, hence scavenging will not delete most of the records Is there any specific reason for keeping such a short duration, if you could please explain... Please set your DHCP advanced DNS options as below so that your DNS records will get updated Also add DHCP server to DNSUpdate Proxy Group on Domain Controller (DNS Server) You already have set credentials in DHCP console Mahesh I inherited the setup and am in the process of trying to clean up some of the previous admins configurations. The DHCP lease times have been reduced to 1 hour for each VLAN.Since when you log off the wireless, you're NOT actually releasing the address, the DNS server is keeping that address -- as you have pointed out, for the term of the DHCP lease, or 7 days.You say there are separate VLANs for the wired and wireless networks -- if that also means there are separate DHCP servers, then you're especially in luck...