Set up the second router failed.

Laaron1988 on 05/05/2020 - 15:19

hi,
in short, I want to set a second router to expand signal. everything good but failed,.

in long:

living room has nbn box and the main router. all work good.

living room has a internet wall socket (I wired it with main router), connecting to a wall socket in the study room.

my desktop can get internet when I wired it to the study room socket.

now I want to set a second router in study room but FAILED.

all settings good (I tested the second wired the main router with a 1 meter cable and they work good).

Im guess, maybe the cable between living room and study room is too long. but why my PC can get internet with it??

Internet

Comments

oscargamer on 05/05/2020 - 15:25

+5

What routers do you have?

I think you need to set the second router as an access point, not a router
- ESEMCE on 05/05/2020 - 15:35
  
  +3
  
  +1
  Second router needs to be in AP mode.
  DHCP request forwarding to the main router IP Address.
  
  Ah and while you're in there, set up your WiFi on different channels from your existing router. You can use the same SSID (WiFi name) and Password so that you don't have to set up all your devices to a new setting. Devices should jump to the stronger network happily as you roam the house..
  
  Once everything is set up, connect Ethernet cable to a LAN port on the second router.
  - aaron1988 on 06/05/2020 - 00:36
    
    the problem is, there may some problem on the wires (between sockets). but the sockets work well with my PC.
scrimshaw on 05/05/2020 - 15:31

+1

It's not just plug and play. Your second router must have settings changed for it to work as Repeater / Bridge or as a AP. https://www.lifehacker.com.au/2013/07/how-to-extend-your-wi-…
- aaron1988 on 06/05/2020 - 00:34
  
  all settings good.
  
  it works once I connect them with a 1 meter cable.
  
  but it will fail if i turn to the socket. I use pc wired with socket and pc gets internet.
trex on 05/05/2020 - 15:33

if PC can get connected, cable between living room and study is fine. Look into the setup of your 2nd router, is it capable bridge/repeater mode in the first place?
- aaron1988 on 06/05/2020 - 00:32
  
  set up is fine.
  
  the second router will work if I connect it to the main router WITH a 1 meter cable.
  - pjetson on 06/05/2020 - 09:31
    
    How do you know that? Do you have a different SSID on the second device so that you can be sure you're connecting to it and not to the main device?
cabler365 on 05/05/2020 - 15:42

+1

If cable has been installed correctly, you should be able to get a run of 100m off an Ethernet cable. Doubt you are over that distance. Especially as was noted above that your PC works. Config problem, not wiring problem. Do what @scubacoles said…
- alvian on 06/05/2020 - 03:56
  
  Config problem, not wiring problem.
  
  New info from OP showed it is likely a problem in layer 1 as everything worked fine when connected with a 1m cable.
  
  you should be able to get a run of 100m off an Ethernet cable
  
  That's what the specs say, but in real life the max length is determined by the quality of the cable and the equipment and how much attenuation and interference the system can tolerate. We don't know the quality of OP's in-wall cable and routers.
MS Paint on 05/05/2020 - 17:01

Heaps of youtube tutorials and blogs on how to set this up.
bdl on 05/05/2020 - 17:02

Somebody set up us the bomb.
- pegaxs on 05/05/2020 - 17:19
  
  +1
  
  We get signal…
pegaxs on 05/05/2020 - 17:18

Set up second router as NO DHCP SERVER and to get its address and routing from from the main router (and set a static IP address of the second router as well can also be helpful).
Plug the cable into a normal LAN port, not the WAN port.
…
Profit
CC123 on 05/05/2020 - 20:13

Seems you also like whirlpool

OP, if you don't have to access any network shares/devices (including your Chromecast, Apple Tv, etc if you have one) you could always just set the same SSID (network name) and password on the second router. This will save you from having to reconfigure lots of things.
Devices would just switch from one network to another based on distance.

An alternative would be one of those powerline wifi extenders
aaron1988 on 06/05/2020 - 00:30

the second router will work if I connect it to the main router with a 1-meter internet cable.

I turn to the socket but cant get it work.
- alvian on 06/05/2020 - 03:01
  
  +1
  
  Reading through the comments it appears you know what you're doing and have set up the correct configuration for the extension router to operate in switch + WAP mode. So the problem appears to be in the physical layer.
  
  Test with a known good length of Ethernet cable, of about the same length as from the socket in the study room, up to the ceiling, across to the living room, and down the wall to the main router. This is the only way to isolate the fault to the in-wall Ethernet cable.
  
  If the extension router can connect with the main router with this known good length of Ethernet cable, then the fault is with the in-wall cable. Perhaps the in-wall cable is of low quality and not up to CAT-5/6 standard? Inserting a network switch between the two routers may help solve the problem as switches have higher quality transceivers that might tolerate a low quality cable. The only other thing you can check is the quality of the terminations at the sockets but after that you'll have to replace the in-wall cable.
  
  If the extension router cannot connect with main router even with a known good length of Ethernet cable, then the fault is with the transceivers of one of the routers. Some routers' transceiver were low quality and for one of them the attenuation was too much to handle. Again, inserting a network switch between the two routers may help solve the problem as switches have higher quality transceivers.
  - aaron1988 on 06/05/2020 - 11:49
    
    hi, thanks for ur helpful comment.
    searched a lot online and someone has the similar issue (pc get connected but router cant). unfortunately they even got technicians to do on site checking but cant fix it.
    
    finally I give up. will buy a wifi extender insteading of the second router. PC connecting to the socket is 100% internet working with low ping.
    - ESEMCE on 06/05/2020 - 13:00
      
      I still don't think you have the router set up correctly. The fact you think Ping has any relevance here indicates you're pretty sketchy on networking knowledge.
      
      Reset it and try the setup again.
      
      After resetting the second router, first try connecting it from your wall outlet to its WAN port? This should just work without any setup and will verify that it's not an in-wall cable problem.
      This setup is not ideal though as any device connected to it will be Double NAT.
      
      Assuming that works,
      1) disconnect it from the wall socket,
      2) Disable WiFi on your PC.
      3) connect a LAN port on the second router to your PC.
      4) set up the second router as an AP with DHCP forwarding to your modem/router's IP address.
      5) connect a LAN port on the second router to the wall outlet.
      - aaron1988 on 06/05/2020 - 14:27
        
        @ESEMCE: I used a 1 meter long cable to connect both routers and the second router can get internet. so setting up should be good here.
    - Twix on 06/05/2020 - 17:43
      
      A cheap Tenda Nova or TP-Link Deco mesh will perform better than wifi extenders.
Chris Topher on 06/05/2020 - 12:24

I use 2, yes 2, wifi extender/routers with my wifi modem/router. The modem/router does all DHCP, same SSID. I also have a chinese cheap single plugpack unit that also connects with out any issues, it does both SSID wifi send/receive with one Ethernet port as well.
Over the top? Yes. Nothing exceeds like excess.
The lesson here is, if wifi is in use and gets into the office, go the wifi extender/router.

D-Link DSL-2888A + D-Link DAP-1650 + Netgear WN2500 + Comfast CF-WR150N

Set up the second router failed.

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