Different IP Address on different devices on same network

jenil · Apr 26, 2014

First of all, apologies because i don't know where else to post this...

However since this community has been really helpful to me, i thought i should post it here..

I own a Wifi connectivity from an ISP whose login method is to 1st connect to the wifi network and then login to its own website, after which only it allows to surf the net..

A couple days ago, there was a big storm outside my plcae and the connectivity was down for 1 day..
When the connectivity was restored, i found that the IP address generally used by my laptop was changed somehow..
To test it, i used another laptop in my house and tried to connect to the internet while already logged on from my own laptop to the ISP's website...
Since the spare laptop was connected to an IP address different than the one my laptop was using, It again threw me back to the ISP's homepage where i have to login again to surf the web...
However, when i try to login there, it gives out the error that the user id is same but the ip is different and hence i am not allowed to login in... All this while i can use net on my own laptop...

Similar is the case when i try to connect it to my iPhone...
Same thing as here also, the ip address is different than the one used in my own laptop...

I tried to renew the lease by using command prompt and it gave me a message
"No operation can be performed on Local area network/bluetooth device/ethernet while it has media connected!
I don't know what that means and i have no clue as to what to do next!
Any help would be appreciated...

If any1 needs any additional details, i would be happy to provide it!
P.S. My wifi router is of Linksys!
Also, I resetted my router using the reset button.. Didnt work..
And when i say that the ip addresses are different on 2 laptops, i mean that the 1st two are same, but the 3rd and 4th are different1
And i am unable to login to my router's wesite of 192.168.1.1

HippsieGypsie · Apr 26, 2014

Hi there. Did you try to contact your ISP to resolve your problem?

This is beyond my knowledge so I will message a member that does know more. In the meantime someone else may answer to this.

caperjack · Apr 26, 2014

And i am unable to login to my router's wesite of 192.168.1.1

im not 100% sure on anything , but it could be a issue with the router ,as that address is the routers address to get into the settings of the router ,and you do not need a internet connection to do so, its is not a website per say,

jenil · Apr 26, 2014

HippsieGypsie said:
Hi there. Did you try to contact your ISP to resolve your problem?

This is beyond my knowledge so I will message a member that does know more. In the meantime someone else may answer to this.

Yes i tried contacting my ISP bt they couldn't be any less bothered...
They say they are gonna se d a technician to my place but they never do...

jenil · Apr 26, 2014

caperjack said:
And i am unable to login to my router's wesite of 192.168.1.1

Click to expand...

im not 100% sure on anything , but it could be a issue with the router ,as that address is the routers address to get into the settings of the router ,and you do not need a internet connection to do so, its is not a website per say,

Ok the problem is definately not with the router, as once i put in the static ip i know which used to work before, the router's config website opens and i am able to change the settings!

broe23 · Apr 27, 2014

If you are stating that your ISP uses a Captive portal. That would make sense for the issue you are having. Have you called their tech support department, to see if there is something going on at the head-end. They could be having equipment issues, or your modem may be the problem

jenil · Apr 27, 2014

broe23 said:
If you are stating that your ISP uses a Captive portal. That would make sense for the issue you are having. Have you called their tech support department, to see if there is something going on at the head-end. They could be having equipment issues, or your modem may be the problem

Yeah I called them a bunch of times, but they couldn't be least bothered..
They open up a complaint and then close it because according to them since i am able to surf the net, their system automatically closes my complaint! And the issue i'm facing is of DHCP as once i put in my old internal IP address, the homepage of my router showed up, but i lost all other internet connectivity!
So i guess all i need to do is reconfigure the router...
Can any1 help me wid that?

caperjack · Apr 27, 2014

To bring a computer back onto the network after moving it to a different location, or experiencing an unexpected outage, first release, then renew the IP address.
with the computer hooked to the router ,then
go to run,and type in ipconfig/release
then at run again type in ,ipconfig/renew

broe23 · Apr 27, 2014

jenil said:
broe23 said:

If you are stating that your ISP uses a Captive portal. That would make sense for the issue you are having. Have you called their tech support department, to see if there is something going on at the head-end. They could be having equipment issues, or your modem may be the problem

Click to expand...

Yeah I called them a bunch of times, but they couldn't be least bothered..
They open up a complaint and then close it because according to them since i am able to surf the net, their system automatically closes my complaint! And the issue i'm facing is of DHCP as once i put in my old internal IP address, the homepage of my router showed up, but i lost all other internet connectivity!
So i guess all i need to do is reconfigure the router...
Can any1 help me wid that?

Their system is not closing them. Someone inside the company is doing it. Walk your complaint up the food chain.

alphanumeric · Apr 27, 2014

No two devices on a network can have the same IP address. Unless I misunderstood your post, its normal for your second laptop to have a different IP address that the first one. A second or third device connecting to a network will each receive a different IP address though DHCP. Network devices are identified by their IP address.

broe23 · Apr 27, 2014

alphanumeric said:
No two devices on a network can have the same IP address. Unless I misunderstood your post, its normal for your second laptop to have a different IP address that the first one. A second or third device connecting to a network will each receive a different IP address though DHCP. Network devices are identified by their IP address.

I have seen it happen. Especially if someone is using MAC Cloning.

alphanumeric · Apr 27, 2014

broe23 said:
alphanumeric said:

No two devices on a network can have the same IP address. Unless I misunderstood your post, its normal for your second laptop to have a different IP address that the first one. A second or third device connecting to a network will each receive a different IP address though DHCP. Network devices are identified by their IP address.

Click to expand...

I have seen it happen. Especially if someone is using MAC Cloning.

Yes, but if two devices end up on a network with the same IP address, at the same time, they will knock each other off of the network.

broe23 · Apr 27, 2014

That can happen. But I have also seen where both have stayed online. But could not do anything, due to the router/gateway/modem ARP table was hosed.

alphanumeric · Apr 28, 2014

Either way it won't work, you can't have two devices on a network at the same time with the same IP address.

broe23 · Apr 28, 2014

alphanumeric said:
Either way it won't work, you can't have two devices on a network at the same time with the same IP address.

Like I stated above. I have seen it happen when the ARP table in the gateway/router got hosed up. Clear the table, and everything went back to normal.

alphanumeric · Apr 28, 2014

broe23 said:
alphanumeric said:

Either way it won't work, you can't have two devices on a network at the same time with the same IP address.

Click to expand...

Like I stated above. I have seen it happen when the ARP table in the gateway/router got hosed up. Clear the table, and everything went back to normal.

Yes but they can't use the network, that's my point. You could if you wanted to, set two PC's up with identical static IP addresses. Turn them both on at the same time, on the same network and they'll knock each other off of the network.

broe23 · Apr 28, 2014

If the router is working properly. You are not hearing me through what you want to see and hear. The OP problem is with their Network equipment and possibly the NIC's. They have not been back. So most likely will never know what their problem was, since they were never distinct as to what their network infrastructure is.

Different IP Address on different devices on same network

New Member

My Computer

It's Gururrrrrr8!

My Computer

Just the Janitor

My Computer

New Member

My Computer

New Member

My Computer

Retired from the grind

My Computer

New Member

My Computer

Just the Janitor

My Computer

Retired from the grind

My Computer

slightly off center

My Computer

Retired from the grind

My Computer

slightly off center

My Computer

Retired from the grind

My Computer

slightly off center

My Computer

Retired from the grind

My Computer

slightly off center

My Computer

Retired from the grind

My Computer