IP address in conflict..?

[Kent J]

Hi all,

I have a wireless network with a ADSL modem/router and a wireless DLink
'Range Extender'.

When I run this I get: 'Windows - System Error. There is an IP-adressin
conflict with another system on the network'.
What does this mean? How can I fix it?

Kent J.

 

[Richard G. Harper [MVP]]

It means what it says - the IP address your computer is trying to use is
already assigned to another device on the network. Find the offending
device by checking the IP address of all devices on the network, then change
the address of one or the other devices - your PC or the other device on the
network with the same IP address, whichever would be easiest.

 

[Kent J]

OK!
I have a router with DHCP that provides PC:s running with a dynamic
IP-address and also a Dlink RangeExtender, with a static
IP-address,working as a slave.

If I check attached devices from my router I'll get:

# IP Address Device Name MAC Address
1 192.168.0.5 MYCOMPUTER 00:21:91A:78:51
2 192.168.0.31 DLINK 00:21:91A:78:51

Different IP-address but the same MAC Address.
Is that a problem?

Kent J.


Richard G. Harper [MVP] skrev:

 

[Joel Guzman]

Yes its a problem

OK!
I have a router with DHCP that provides PC:s running with a dynamic
IP-address and also a Dlink RangeExtender, with a static
IP-address,working as a slave.

If I check attached devices from my router I'll get:

# IP Address Device Name MAC Address
1 192.168.0.5 MYCOMPUTER 00:21:91A:78:51
2 192.168.0.31 DLINK 00:21:91A:78:51

Different IP-address but the same MAC Address.
Is that a problem?

Kent J.


Richard G. Harper [MVP] skrev:

 

[Kent J]

What is a MAC-address anyway?
How can the address be the same?

Kent J.



Joel Guzman skrev:

 

[Bob I]

See
http://www.google.com/search?hl=en&q=MAC+address&aq=f&oq=
and
http://www.google.com/search?hl=en&q=MAC+address+spoofing

 

[Kent J]

I'm afraid I still dont' get it.
I have three different MAC addresses that relates to MYCOMPUTER

1.) From ipconfig /all:
Physical address: 00-19-5b-eb-34-52

2.) From 'Configure' on the network card:
Local Administartion MAC Network Address: 00DEADBEEFCAFE

3.) From the router 'Attached Devices':
# IP Address Device Name MAC Address
1 192.168.0.4 MYCOMUTER 00:21:91A:78:51
2 192.168.0.31 RANGE EXTEND 00:21:91A:78:51

Should't it be just one MAC address per device?

Kent J.





Bob I skrev:

 

[Tim Jackson]

I'm afraid I still dont' get it.
I have three different MAC addresses that relates to MYCOMPUTER

1.) From ipconfig /all:
Physical address: 00-19-5b-eb-34-52

2.) From 'Configure' on the network card:
Local Administartion MAC Network Address: 00DEADBEEFCAFE

3.) From the router 'Attached Devices':
# IP Address Device Name MAC Address
1 192.168.0.4 MYCOMUTER 00:21:91A:78:51
2 192.168.0.31 RANGE EXTEND 00:21:91A:78:51

Should't it be just one MAC address per device?

Kent J.





Bob I skrev:

Get rid of the Locally Administered MAC Address, change the setting in
Configure to "Not Present".

Shutdown all your PCs and routers. Wait 30 seconds, Power up your router(s)
and wait for them to settle, power up your PCs and check for problems.

 

[Kent J]

Tim Jackson skrev:

Get rid of the Locally Administered MAC Address, change the setting in
Configure to "Not Present".

Shutdown all your PCs and routers. Wait 30 seconds, Power up your router(s)
and wait for them to settle, power up your PCs and check for problems.

Thanks!
Now it seems to work. I have different MAC-adresses.

3 192.168.0.4 MYCOMPUTER 00:19:5B:EB:34:52
4 192.168.0.31 RANGE EXTEND 00:21:91A:78:51


Kent J.

 

[Tim Jackson]

Tim Jackson skrev:
Thanks!
Now it seems to work. I have different MAC-adresses.

3 192.168.0.4 MYCOMPUTER 00:19:5B:EB:34:52
4 192.168.0.31 RANGE EXTEND 00:21:91A:78:51


Kent J.

YW