Subnet Mask Problem

  • Thread starter Thread starter Tris
  • Start date Start date
T

Tris

I have just installed a new domain controller, which
works fine apart from 1 problem. For some reason a few
users couldn't log on or get some of the network
resources, took a few minutes to find out what was
causing the problem. What it was, was that when you use
the IPCONFIG cmd, it comes up with a different subnet
mask than the one we are using, so the only thing i can
do is release the DNS settings. This is a quick fix,
where is it getting this wrong setting? Why does
everyone not have the problem at the same time? I have
checked the DHCP settings, cannot see the problem. What
would be causing this, am I right by looking in the DHCP
settings?

Help
 
How many nics in the server? Do options 003, 006 and 015 exist in
DHCP-server, Scope options? Check the ipconfig/all on the server and post it
please.
 
There is 2 NICs, but only 1 plugged in.
003 - 10.0.0.1 (router)
006 - 10.0.0.2 (DNS server)
015 - axminster.co.uk

Windows 2000 IP Configuration

Host Name . . . . . . . . . . . . : PHAETON
Primary DNS Suffix . . . . . . . :
axminster.co.uk
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . :
axminster.co.uk
co.uk

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom
NetXtreme Gigabit Ether
Physical Address. . . . . . . . . : 00-0B-DB-D5-
1D-FB
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 10.0.0.5
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IP Address. . . . . . . . . . . . : 10.0.0.2
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 10.0.0.1
DNS Servers . . . . . . . . . . . : 10.0.0.2
Primary WINS Server . . . . . . . : 10.0.0.2

Ethernet adapter Local Area Connection 2:

Media State . . . . . . . . . . . : Cable
Disconnected
Description . . . . . . . . . . . : Broadcom
NetXtreme Gigabit Ether
#2
Physical Address. . . . . . . . . : 00-0B-DB-D5-
1D-FD
 
This was from the server? Why does it have 2 IP's (10.0.0.2 and 10.0.0.5)?
Get rid of the 10.0.0.5.

Regards,

Marina
 
According to your ipconfig thiscomputer is configured statically and not as
a DHCP client.
Also you should disable the other NIC if you are not using it.

--

Thanks,
Marc Reynolds
Microsoft Technical Support

This posting is provided "AS IS" with no warranties, and confers no rights.
 
But why would this cause a problem, both IP addresses
have the same subnet. We are using 2 IP addresses,as we
are in a transition period. I saw on a bulletin board
that it could be a problem with 98 machines, or a switch
issue. It has been said that turning off the Spanning
tree protocol has solved this issue in the past. Also
updating the firmware on the switch.
 
Do yourself a favor and take out that 10.0.0.5 address.
You should have WINS installed on the server and options 044 and 046 (0x8)
in DHCP-server, Scope options.
 
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