[CentOS] *tangent* High Availability using 2 sites -- yep, "propogation."

Hello Les,

Thanks for that info.  I'm playing with this now and although the
'failover' process seems rather slow, it does seem to be doing what I
need. I setup a subdomain entry to point to 4 IP's, only one if which
is actually working, and indeed, when IE get's a non-active IP, it
eventually goes to the next one until it finally finds the actual live
IP.  Once it gets the live one, the site works as expected (of
course).

I'm glad I stumbled onto this thread... for my client's current need,
this will do the trick nicely.

-- 
Best regards,
 Mickael
            mailto:mikelists at silverservers.com

Thursday, January 5, 2006, 12:05:19 PM, you wrote:

> On Thu, 2006-01-05 at 13:33, Mickael Maddison wrote:

>> Forgive me for this sidestep, but you are saying that Windows/IE
>> actually ignores bad IP addresses if a site lists multiple IP's in a
>> DNS lookup?  I tried this approach for some redundancy a couple years
>> ago and it didn't seem to work as you suggest.  If it has indeed
>> changed to work that way, this will help one of my clients immensely.

> The versions of IE I've tried have been very good at this although
> it doesn't work for other stock windows apps. You may need
> to make sure that ICMP 'unreachable' packets are not firewalled
> so down hosts are detected quickly.   You can test it easily by
> setting up a dummy DNS name with a bunch of A records where some
> point to working servers and some don't.