Windows 7 IP address conflict with itself

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blackpit

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Jan 29, 2013
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Hi folks,

I've got a wireless network, consisting of two Windows 7 PCs, a wireless printer, an Android tablet and an iPhone. The PCs are always on the network; the other devices only connect occasionally. The router is a Dynamode R-ADSL-C4-W-G1. IP addresses are assigned by DHCP, and both PCs are set up to get an IP address automatically.

Now and again, I get an error message on my PC, saying Windows has detected an IP address conflict on the network. I looked in the System Event Log, and found the following message:

The system detected an address conflict for IP address 10.0.0.3 with the system having network hardware address [hex number here]. Network operations on this system may be disrupted as a result.
When I checked in the router settings, I found 10.0.0.3 had been assigned to the other PC, which also has the hardware address given in the error message - I'm not sure how that constitutes a conflict!

When I get this error message, I never encounter any connectivity problems - i.e. both machines can still access the internet.

Any advice appreciated!
 
Joined
Aug 30, 2012
Messages
893
Did you check IP addresses on both machine from within those machine ('ipconfig /all' in command prompt) when it happens?
 

TerryNet

Terry
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Joined
Mar 23, 2005
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80,751
When I checked in the router settings, I found 10.0.0.3 had been assigned to the other PC, which also has the hardware address given in the error message - I'm not sure how that constitutes a conflict!
IP addresses on a network must be unique; duplicate IPs constitute a conflict.

In my experience Windows 7 usually goes ahead and releases the dup. and requests another one. XP usually waits for you to do something.
 

blackpit

Thread Starter
Joined
Jan 29, 2013
Messages
3
Thanks for replies.

I got the error message again today. This time the conflict was between my computer and the iPhone, but in the router my computer has the address 10.0.0.6 and the iPhone has 10.0.0.5. The iPhone gets an IP address via DHCP.
ipconfig on my computer produced this:

Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : USB Wireless 802.11 b/g Adaptor
Physical Address. . . . . . . . . : 00-22-5F-FD-CB-DA
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::11ab:20c7:46cf:457a%12(Preferred)
IPv4 Address. . . . . . . . . . . : 10.0.0.6(Preferred)
Subnet Mask . . . . . . . . . . . : 255.0.0.0
Lease Obtained. . . . . . . . . . : 02 February 2013 09:26:11
Lease Expires . . . . . . . . . . : 03 February 2013 09:26:12
Default Gateway . . . . . . . . . : 10.0.0.2
DHCP Server . . . . . . . . . . . : 10.0.0.2
DHCPv6 IAID . . . . . . . . . . . : 218112607
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-9B-B3-15-90-E6-BA-A4-BC-A7
 

blackpit

Thread Starter
Joined
Jan 29, 2013
Messages
3
Thanks for replies.

I got the error message again today. This time the conflict was between my computer and the iPhone, but in the router my computer has the address 10.0.0.6 and the iPhone has 10.0.0.5. The iPhone gets an IP address via DHCP.
ipconfig on my computer produced this:

Wireless LAN adapter Wireless Network Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : USB Wireless 802.11 b/g Adaptor
Physical Address. . . . . . . . . : 00-22-5F-FD-CB-DA
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::11ab:20c7:46cf:457a%12(Preferred)
IPv4 Address. . . . . . . . . . . : 10.0.0.6(Preferred)
Subnet Mask . . . . . . . . . . . : 255.0.0.0
Lease Obtained. . . . . . . . . . : 02 February 2013 09:26:11
Lease Expires . . . . . . . . . . : 03 February 2013 09:26:12
Default Gateway . . . . . . . . . : 10.0.0.2
DHCP Server . . . . . . . . . . . : 10.0.0.2
DHCPv6 IAID . . . . . . . . . . . : 218112607
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-9B-B3-15-90-E6-BA-A4-BC-A7
 
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