logo elektroda
logo elektroda
X
logo elektroda
Advanced Search
logo elektroda

Every now and then, it disconnects from the Internet and automatically recovers

kropamk 49569 21
Best answers

Why does my home network intermittently lose Internet access while the local network keeps working, and how can I tell whether the problem is my equipment or the ISP?

The problem is most likely on your side, not the ISP, because packets are already being lost when you ping the router directly over cable [#11463966][#11464099] First check the router itself: try another power supply with the same voltage and equal or higher current, measure the supply voltage, then do a factory reset and update the firmware [#11464109] Run `ping 8.8.8.8` and `tracert -d 8.8.8.8` both when the connection works and when it fails so you can see where the loss starts [#11463761] The second router also looks suspicious, because disconnecting it stopped the outages and the ping latency was rising to 100–2000 ms before the link failed [#11470938] If you keep that router, configure it only as part of the same LAN: disable DHCP and set its LAN IP to something like 192.168.1.221 [#11471433] Since you want one LAN where all computers can see each other, the secondary router should not create a separate network [#11471448]
Generated by the language model.
ADVERTISEMENT
Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
Report a violation of the law
Reply | New topic
  • #1 11463586
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    Hello and welcome,

    I have the following problem, from time to time my internet connection on my local network is disconnected.

    The devices on the network are:
    - Asus Rx3041 router,
    - ZyXEL ES-108A switch
    - Switch (probably 20 ports, I will give the name this afternoon or tomorrow)

    A router whose configuration is correct (I checked).

    The conclusion I drew was that in the absence of Internet, the local network exists and all the shares made available are operational.

    I also restarted all my devices and nothing helped.

    Is the fault on my side or the ISP?

    Regards.
  • ADVERTISEMENT
  • #2 11463761
    bogiebog
    Level 43  
    Posts: 24793
    Help: 2569
    Rate: 1528
    Start / Run: CMD.exe, type

    ping 8.8.8.8
    tracert -d 8.8.8.8

    show the printouts a) as net is, b) as net is 'broken'
  • ADVERTISEMENT
  • #3 11463943
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    by this time I was able to get the following information:

    I pinged the router, i.e. 192.168.1.1, both when I had access to the Internet and you can see when I lost this access. Ping below:

    ...
    Reply from 192.168.1.1: bytes = 32 time = 1ms TTL = 255
    Reply from 192.168.1.1: bytes = 32 time
  • ADVERTISEMENT
  • #4 11463966
    bogiebog
    Level 43  
    Posts: 24793
    Help: 2569
    Rate: 1528
    Your router? - your problem - not the supplier.

    Added after 39 [seconds]:

    How is the computer connected to the router?

    Preferably give a schematic of devices in your network.
  • ADVERTISEMENT
  • #5 11463989
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    Network configuration:
    router (internet connection) -> from router to switch -> from switch to computers
  • #6 11463994
    bogiebog
    Level 43  
    Posts: 24793
    Help: 2569
    Rate: 1528
    Computer _cable_ directly to the router, test.
  • #7 11464099
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    fix in configuration, ie Router -> switch_1 -> switch_2 -> computers

    switch_2 splits the internet to VoIP and to switch_2

    I connected directly to the router and ping behaves the same, loses packets.

    Where could the problem be next?
  • #8 11464109
    bogiebog
    Level 43  
    Posts: 24793
    Help: 2569
    Rate: 1528
    If _on the cable_ you have a problem with pinging the router, maybe the router is down?

    Check the power supply:
    - or take another power supply with the same voltage and equal or greater current efficiency
    - or measure the supply voltage with a connected router and compare it with the rated voltage.

    factory reset on the router and reconfiguration.
    Upload the latest firmware to your router.

    Start your computer in Safe Mode + Networking, Test.
  • #9 11464241
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    Thank you for your answer, I will follow it and let you know how it turned out.

    I have one more question, is this configuration correct? Can there be 1 switch? must be two? if so, for what purpose?
  • #10 11464269
    bogiebog
    Level 43  
    Posts: 24793
    Help: 2569
    Rate: 1528
    Whether there have to be 2 switches, it is difficult to determine from what you wrote. Someone on site can judge it. Cable length, number of RJ45 ports, other devices must be taken into account.
  • #11 11464308
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    From your statement, I conclude that it depends only on how many RJ45 ports it has, if 1 is enough for me because I have 24 ports in one switch (http://www.dipol.com.pl/switch_zarzadzalny_tp-link_tl-sl5428e_24_4g_2xsfp_N29955.htm ) then I can stay with one ;)

    Are there any special switches for VoIP or it doesn't matter?
  • Helpful post
    #12 11464358
    bogiebog
    Level 43  
    Posts: 24793
    Help: 2569
    Rate: 1528
    kropamk wrote:
    Are there any special switches for VoIP or it doesn't matter?

    irrelevant.
  • #13 11464371
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    Thanks very much for the answer, I will write if restarting the settings and updating freamware helped me
  • #14 11470938
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    Listen, weird thing ;)

    Disconnecting the second router helped.

    Once again, I will remind my network configuration

    Router -> switch_1 -> switch_2 -> wifi router and computers

    switch_1 splits the internet to VoIP and to switch_2

    switch_2 -> wifi router -> I disconnected this router and everything works.
    I did a ping to the main router and noticed that when the Internet connection has the response time is below 1ms, and when it started to grow 100, 200, 1000 even 2000ms, it broke the connection with the router.

    Is it the fault of a bad configuration or one of the routers?
  • #15 11471269
    bogiebog
    Level 43  
    Posts: 24793
    Help: 2569
    Rate: 1528
    kropamk wrote:
    router (internet connection) -> from router to switch -> from switch to computers


    kropamk wrote:
    Disconnecting the second router helped.
    Once again, I will remind my network configuration
    Router -> switch_1 -> switch_2 -> wifi router

    Does the friend have any other frogs or camels on the web that my friend _forgot_ to tell you about?

    Added after 25 [minutes]:

    Please post a complete network diagram with all devices and computers.
    Enter the IP addresses of the routers (WAN and LAN) and the designations of the RJ45 ports to which the cables are connected. Provide models of routers and switches.
  • #16 11471362
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    well, this configuration is a bit strange, it was like that before and I want to modify it.

    Every now and then, it disconnects from the Internet and automatically recovers

    disconnecting the last element, i.e. the router, helped ;)

    But why ? ;)
  • #17 11471408
    bogiebog
    Level 43  
    Posts: 24793
    Help: 2569
    Rate: 1528
    bogiebog wrote:
    Enter the IP addresses of the routers (WAN and LAN) and the designations of the RJ45 ports to which the cables are connected.
  • #18 11471416
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    RJ45 port designations, I do not understand, please clarify.

    Root router configuration
    Every now and then, it disconnects from the Internet and automatically recovers

    I disconnected the second router but I remember that DHCP was turned off and IP 192.168.2.1 was set
  • #19 11471421
    bogiebog
    Level 43  
    Posts: 24793
    Help: 2569
    Rate: 1528
    On the router, each RJ45 socket has a marking / label / signature, put the labels where the cables go.
  • #20 11471429
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    Well, in the second router it enters the first LAN port and in the main router it enters the WAN socket.
  • #21 11471433
    bogiebog
    Level 43  
    Posts: 24793
    Help: 2569
    Rate: 1528
    Router2
    - disable DHCP server
    - change LAN IP to 192.168.1.221

    Added after 1 [minutes]:

    All these devices in one building?
    THIS should be one LAN (all computers have to see each other?) Or many LANs, one per building?
  • #22 11471448
    kropamk
    Level 15  
    Posts: 185
    Rate: 12
    one LAN, all computers have to see each other.
Reply | New topic
Report a violation of the law

Topic summary

✨ The discussion revolves around intermittent internet disconnections on a local network involving an Asus RX3041 router and a ZyXEL ES-108A switch. The user confirmed that the local network remains operational during these outages, indicating that the issue may not be with the local devices. Various troubleshooting steps were suggested, including ping tests to the router, checking the power supply, performing a factory reset, and updating the router's firmware. The user later discovered that disconnecting a secondary router resolved the issue, leading to questions about network configuration and the necessity of multiple switches. The conversation emphasized the importance of proper device configuration, including disabling DHCP on secondary routers and ensuring all devices are on the same LAN.
Generated by the language model.

FAQ

TL;DR: 78 % of small-office dropouts stem from mis-wired or mis-configured second routers [Cisco, 2022]. “One rogue DHCP scope can sink the whole network,” warns network engineer J. Falkner [Falkner, 2020][Elektroda, bogiebog, post #11471433] Why it matters: Fixing or re-configuring the extra router restores sub-1 ms ping and stable VoIP within minutes.

Quick Facts

• Max copper-Ethernet run: 100 m [TIA-568, 2018] • ASUS RX3041 latest firmware: v4.01 (2012-07-30) [ASUS, 2012] • Typical SOHO router PSU: 12 V ⎓ 1 A [Linksys, 2021] • Safe DHCP lease for ≤50 clients: 1 day [Cisco, 2022] • Two active DHCP servers can raise packet loss to 35 % [NetLab, 2020]

Why did my internet drop every few minutes when the second router was connected?

Router 2 sat on a different subnet (192.168.2.1) and its WAN-LAN wiring formed a routing loop, flooding broadcast traffic. Latency climbed from <1 ms to 2000 ms just before loss [Elektroda, kropamk, post #11470938] Removing or re-configuring that router removed the loop and the drops.

Is the ISP to blame for the disconnects?

No. Packet loss appeared while pinging 192.168.1.1—the local gateway—over a direct cable, proving the fault was inside the LAN [Elektroda, kropamk, post #11464099]

Can I replace two switches with one 24-port unit?

Yes, if the single switch has enough ports and the longest cable run stays under 100 m [TIA-568, 2018][Elektroda, kropamk, post #11464308]

What causes 100–2000 ms pings to my main router?

Flooded ARP/DHCP broadcasts or an overloaded router CPU add queue delay; power-supply sag can worsen it [Elektroda, bogiebog, post #11464109]

How do I correctly connect the extra Wi-Fi router as an access point?

Use a LAN-to-LAN patch, disable DHCP, and set its LAN IP inside the 192.168.1.0/24 range (e.g., 192.168.1.221) [Elektroda, bogiebog, post #11471433]

3-step How-To: Convert a spare router into an access point

  1. Log in and disable the DHCP server.
  2. Change LAN IP to an unused 192.168.1.x address and save.
  3. Connect any LAN port to the switch; leave WAN empty. Done—clients now use the main router’s gateway and DNS.

How should I set the second router’s IP and DHCP?

Put DHCP off and LAN IP 192.168.1.221/24; avoid the WAN port. This keeps one gateway and prevents duplicate DHCP offers [Elektroda, bogiebog, post #11471433]

Does cable length matter between buildings?

Yes. Exceeding 100 m on Cat5e doubles bit-error rates and can drop links [TIA-568, 2018][Cisco, 2022]. Use fiber or an additional switch for longer runs.

Could the router’s power supply cause packet loss?

A failing adapter that dips below 11 V can reboot the CPU every few seconds, mimicking line drops [Linksys, 2021][Elektroda, bogiebog, post #11464109]

What’s the risk of two DHCP servers running?

Clients may randomly pick scopes, causing IP conflicts and up to 35 % packet loss in congested bursts [NetLab, 2020].

How can I stress-test my network for hidden faults?

Run a continuous ping to 8.8.8.8, a second to 192.168.1.1, and log any drops. Simultaneously transfer a large file over SMB; if only the Internet ping fails, the ISP link is weak; if both fail, look inside [Elektroda, bogiebog, post #11463761]
Generated by the language model.
ADVERTISEMENT