smtp load balancer???

[Dennis Willson]

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Chris Conn wrote:
>>> avhost      5       IN      A       65.196.224.20
>>> avhost        5       IN      A       65.196.224.81
>>>
>>> gives you a 5 second TTL on both records.  Remove one, reload DNS, 
>>> and 5 seconds later it never existed.
>>
>>
>>
>> Been there, done that. My FreeBSD machines worked fine, my Macs worked 
>> fine, my clients with Windows 2003 server continued to cache the 
>> record. Two weeks ago I changed the IP on ecluster4.tls.net from 
>> 65.196.224.134 to 65.196.224.135, yet I still have traffic. This is 
>> not supposed to be so, I have had plenty of people tell me is not so, 
>> yet I have traffic. When I call a client and have them go to their 
>> office server and run "ipconfig /flushdns" everything works again.
>>
>> DAve
> 
> 
> Hmm, that's too bad.  My Windows DNS server does not behave like that.  
> My other UNIX servers are fine too, and to my knowledge I have not found 
> a MS client that would override the record TTL.
> 
He's talking about a Windows workstation resolver, not the DNS server. "ipconfig /flushdns" only
clears the local workstation resolver cache. I have seen this too even when the primary DNS server was also Microsoft.


> It does not really matter since I do not rely on this method, however my 
> experience differs from yours it seems when it comes to DNS ttls.
> 
> How did you declare the record and the TTL in the DNS?
> 
> Chris
> 
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