lost ip address after log off

  • Thread starter Thread starter Dave
  • Start date Start date
D

Dave

I have several Win2K machines in a peer to peer network
with DHCP provided by an SMC Barricade router. Recently 2
machines have started losing their ip address when the
user logs off, so shared files and printers are no longer
available until someone logs on. This setup has been
running for over a year and this never happened until
recently. It only happens with 2 machines. The others keep
their ip address even when logged off. Does anyone know if
there is some setting that affect this, or if some recent
windows update might have changed something?
 
- How did you determine that the machines had lost
their IP address?
- If you make a note of their IP address, then arrange
for a continuous ping from one of the other machines
(ping 192.168.1.55 -t), what happens when the user
logs off the problem machine?
- What do you get in c:\Test.txt if you do the following
on one of the problem machines:
1. Create a batch job c:\test.bat -
@echo off
:again
echo %date% %time% >>c:\test.log
ipconfig >> c:\test.log
ping localhost -n 300
2. Type this command from the Command Prompt:
at HH:MM c:\test.bat (where HH:MM is 5 minutes
after the time you intend to log off).
 
Sorry - I omitted one line in the batch file. Here is the
whole post again:

- How did you determine that the machines had lost
their IP address?
- If you make a note of their IP address, then arrange
for a continuous ping from one of the other machines
(ping 192.168.1.55 -t), what happens when the user
logs off the problem machine?
- What do you get in c:\Test.txt if you do the following
on one of the problem machines:
1. Create a batch job c:\test.bat -
@echo off
:again
echo %date% %time% >>c:\test.log
ipconfig >> c:\test.log
ping localhost -n 300
goto again
2. Type this command from the Command Prompt:
at HH:MM c:\test.bat (where HH:MM is 5 minutes
after the time you intend to log off).
 
I determined that the machines had lost their IP address
because:
1) they disappear from network neighbourhood
2) pinging their former address provides no response
3) they disappear from the DHCP log on the router
4) pinging all addresses in the subnet indicates no
response from any new address
5) as soon as a user logs back on, the machine reappears
with it's former address

I am not at the location where these machines are (I
administer them remotely through a VPN) so I cannot test
your batch file or the continuous ping until tomorrow. I
will post the results when I can. Thanks.
 
This sounds like a personal firewall issue.


Dave said:
I determined that the machines had lost their IP address
because:
1) they disappear from network neighbourhood
2) pinging their former address provides no response
3) they disappear from the DHCP log on the router
4) pinging all addresses in the subnet indicates no
response from any new address
5) as soon as a user logs back on, the machine reappears
with its former address

I am not at the location where these machines are (I
administer them remotely through a VPN) so I cannot test
your batch file or the continuous ping until tomorrow. I
will post the results when I can. Thanks.
Click to expand...
 
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