Duplicate IP Addresses

[Gyawdyr]

Scenario:

I use static IP addresses on all end devices.

Computer A and Computer B are both assigned the same IP address (intentionally).

As long as only ONE of the two computers, A & B, are on, and the other is off, there should be no conflicts correct?

Don't ask why, I know this isn't normal or ideal.

Thanks.

[Lurick]

Yah, so long as neither device is on at the same time there will not be any conflict. It might take a couple seconds for the ARP table to update on the switch or router but that's about it.

[Luc401]

There would be no conflicts if the other device is off and not connected to the network at all, because even when a computer is off it can still receive packets. If both pc's were on and using the same IP, weird stuff happens and can cause a lot of unnecessary network traffic.

[Gyawdyr]

2 minutes ago, Luc401 said:

There would be no conflicts if the other device is off and not connected to the network at all, because even when a computer is off it can still receive packets. If both pc's were on and using the same IP, weird stuff happens and can cause a lot of unnecessary network traffic.

Even with wake on lan disabled?

[Luc401]

8 minutes ago, Gyawdyr said:

Even with wake on lan disabled?

Theoretically, since the packet still might be sent to wake but the bios doesn't accept.

[Gyawdyr]

3 minutes ago, Luc401 said:

Theoretically, since the packet still might be sent to wake but the bios doesn't accept.

So what if all sorts of network activity happen on computer B while computer A is off.  What behavior will computer A show when it is turned on? Would those packets jsut disappear?

[Luc401]

2 computers both on with the same IP sometimes you dont even notice that its happening, but its not perfect in practice since you put 50 computers same IP then it will bog down the network. Its just not proper practice, and the 2 computers will be communicating with the network being like who does this packet go to since we both have the same IP.

[Gyawdyr]

2 minutes ago, Luc401 said:

2 computers both on with the same IP sometimes you dont even notice that its happening, but its not perfect in practice since you put 50 computers same IP then it will bog down the network. Its just not proper practice, and the 2 computers will be communicating with the network being like who does this packet go to since we both have the same IP.

Oh sorry, I meant when computer A is turned on after B was shutdown

[Luc401]

1 minute ago, Gyawdyr said:

Oh sorry, I meant when computer A is turned on after B was shutdown

Computer A will act as if it was the only one on the network with that IP then.