How often does Google update its DNS

What happens when a domain name is pointed to different IP

[coco]

I had a site served on a .uk.com and a co.uk both pointing to the same IP address. I acquired the .com about 4 months ago and pointed this to the same IP. Now when I look at link pop for each of these on google. the uk.com and co.uk have the same but the .com still has none. The .com also has a PR 0 whilst the other two show PR 5.

Has anyone else had similar? or atleast be able to point me in the right direction?

All suggestions welcome?

[przero2]

Googlebot has a HUGE issues with changing IPs without changing the nameservers. 2 months ago I changed a domain from virtual shared IP to a different static IP. Ever since the bot is all confused. It displayed a 'Welcome Raq page' in the last month index and now totally wiped out all the pages from the index. And the bot is feverishly spidering now on the old IP address (welcome to cobalt raq IP) getting all 404s. Over 2 months, it still does not know that the domain had a different IP and cannot crawl on the new IP. On the other hand, it seemed to be good about changing the name servers and picks up the name server changes pretty quickly

[coco]

Thanks for that PRZER02. Although I thought if the old ip is dishing out a 404 google would update to the new IP?

[przero2]

coco, that is what i expected. but it is just kept getting thousands of 404s and did not seem to learn!. i wrote to [e-mail] and that does not seem to help either:)

may be next month or if googleguy notices this thread and informs their "bot" team about this weirdness!

[ciml]

coco, each domain can be accessed individually, right? This sounds more like a duplicate problem than a DNS problem. It's just that the links still point to the .co.uk or .uk.com address; that's what PageRank's about.

przero2, 2 months? That's a long time. GoogleGuy indicated that Google is refreshing DNS quicker these days.

[przero2]

ciml, that is what i thought and read too. i think it is true if the DNS change involves nameserver changes but not so if it is a mere change in IP address. i am seriously thinking about moving to a different nameserver temporarily and switch back to my server later, although it is painful. i wish the bot is a little smart about how it catches DNS changes that involves only a change to IP address without the nameserver changes;)

[coco]

I'm still alittle confused about this. I'm sure google must have updated it's DNS since I pointed the new .com to the same IP as the .uk.com and .co.uk.
The duplicate thing sounds interesting - although why was it not a problem with the .uk.com and .com ?