Computer showing name of a network other than what its connected to.

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Pratyay67

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Aug 27, 2014
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I have a 4 router setup running in my house, with one as master and the others connected LAN-LAN to it with DHCP turned off. Lately I've been encountering problems with my network, a strange one being that one of the computers showing a network name of another router than what its connected to. The name of the router which is showing is on my network. Another one is that a network printer being configured by AutoIP rather than DHCP addressing (beginning with 168.256..).
What could be causing the problem, and how to get around it?

Re: I can show it by a diagram.
 
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Ralston18
What make and model is your master router? Its' actual device mapping capabilities may be minimal with limited accuracy and thoroughness. Plus any network misconfigurations can cause misleading or confusing results....

All I can think of, for the moment, is that 1) the ground floor computer is mis-configured for your network and/or 2) the second floor router is likewise misconfigured.

The mis-behaving ground floor computer is looking for an IP address. You configured its' network adapter to look for the master router at 192.168..

For some reason ground floor computer is finding the second floor router instead of the master router.

But I am also wondering about the physical wiring - are you sure that the ground floor computer...
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Ralston18

Ralston18

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Start by checking the computer in question. Verfiy that the network adapter is correcty configured to obtain its IP address from the designated DHCP router.

Are you sure that the IP begins with 168. and not 169. The latter IP (169) is the default IP address Microsoft Windows self assigns to itself when an IP address cannot be otherwise obtained.

By AutoIP (?) I believe you mean Static IP. Is that Static IP reserved for the printer on the DHCP router? And is an IP outside of the availbable DHCP IP address range. The IP also should be reserved via the MAC of the device being assigned that particular Static IP.

Check all of the other routers to ensure that they are still appearing on the network via the Static IP address you assigned at setup.

And your diagram may prove useful. Include the diagram in your next post. Just do not publish your private IP address -that being the IP address provided by your ISP.
 
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Pratyay67

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Yes. The IP address begins with 169. Though it is resolved by now. The printer is now assigned an IP address congruent with my network, i.e beginning with 192.168.. But that doesn't mean it'll not get screwed again.

But the computer's issue is not yet resolved. It still shows the network name of another router, though it is connected to another router. Strangely enough, the routers reside on two floors, with a floor between them. The erring computer is on the ground floor, whereas the router whose name it is showing is on the second floor.

And yes, I can access the pages of the routers by typing in the static IP addresses that I assigned to them at the beginning. Strangely though, I cannot see them on the connected device list on my master router.
 
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Ralston18

Ralston18

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Oct 11, 2014
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What make and model is your master router? Its' actual device mapping capabilities may be minimal with limited accuracy and thoroughness. Plus any network misconfigurations can cause misleading or confusing results....

All I can think of, for the moment, is that 1) the ground floor computer is mis-configured for your network and/or 2) the second floor router is likewise misconfigured.

The mis-behaving ground floor computer is looking for an IP address. You configured its' network adapter to look for the master router at 192.168..

For some reason ground floor computer is finding the second floor router instead of the master router.

But I am also wondering about the physical wiring - are you sure that the ground floor computer is truly connected to the desired router (ground floor router). Double check the LAN to LAN connections.

What, if anything, is on the floor between the two. Is there some rogue router involved - maybe on the floor between? Any switches that you know of? What network name do you expect and what is the "another network name"?

Did you ever use that "another network" name: wired or wireless? What about Windows Workgroup? Have you used that?

Sketch a network diagram per my earlier suggestion. Lable all devices, their host name, current IP (assigned or static),subnet mask, MAC, network name, etc..

I think the key is to get a "big picture" view of your network. Compare what you expect to what is and the comparision should narrow down the problem.

For example:

It could be expected that your master router is configured to be IP 192.168.1.1 and the four other routers would be statically configured using 192.168.1.2, 192.168.1.3, 192.168.1.4, and 192.168.1.5. (E.g., a Linksys environment...) via the LAN to LAN connection ports.

Verify that any main router reserved static IP's are being associated with the correct device MAC. Especially for the routers.

And the master router would be permitted to issue a DHCP IP address range from 192.168.1.10 to 192.168.1.20 (All subnet masks being 255.255.255.0.)

The objective is to verify that current configuration does indeed map to your expectations/requirements.











 
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