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Changing DNS settings in DNS Manager Windows Server 2008

Hi,

I have three SharePoint Servers. Two are web frontends and the other is used as the Meta Crawler.

One Web Server is called SharePointWFE1 IP Address 10.168.1.2 and the other is called SharePointWFE2 10.168.1.3.

We have a CNAME setup it's SharePointWFE. The TTL is set to 30 mins for each webserver. I need to patch SharePointWFE1 tomorrow. I know I can change the CNAME entry to SharePointWFE2 however I don't want to wait or lower the TTL. I want users to be able to switch over to the other Web Server straight away.

Is there a way I can change this manually so this chance kicks in straight away? I think the setting is called reload but it's a while since I've done this. Can you please confirm this?

I hard if I do this it might generate a good bit of network traffic
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How do manually make the change in DNS manager? I don't want to wait for TTL!
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What about the end user i want them to see this effect straight away. Do i click the the reload menu?
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