Greetings!

This is a situation which pops up on occasion.  Workstations affected are 
all Windows XP Pro SP3.

We are a Lotus Notes shop (7.5).  It is the Lotus application that 
"detects" the error, but the cause seems to be something in the 
workstation's network setup.

A user will be logged in, have their Notes app up and running, and will 
have been reading messages throughout the day.  Then, when they attempt to 
open a message, they get this pop-up message:

The remote server is not a known TCP/IP host.

(Well, it was a couple of minutes ago...)

We've had this happen periodically over the past several months.  Once in 
a while (like last Thursday), it may hit several workstations on a given 
day.

The Domino server has a static IP address.  (FWIW, it is on a server 
running Windows 2003 "Standard", SP2.)

Last week, somebody tried pinging the Domino server from an affected WS. 
It was pinging an address in our DHCP realm rather than the actual 
(static) address of the Domino server.  (A search of the network DNS 
tables and DHCP leases show no such address for the Domino server; all 
entries for the Domino server are the correct static address.)  The 
workstations have no entries in their local HOSTS file.

The command "ipconfig /flushdns" tends to resolve the situation. 
However...

What would cause the local DNS cache to go screwy this way, mid-session?

Thanks!
--
Richard D. McClary
Systems Administrator, Information Technology Group 
ASPCA®
1717 S. Philo Rd, Ste 36
Urbana, IL  61802
 
[email protected]
 
P: 217-337-9761
C: 217-417-1182
F: 217-337-9761
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