Welcome to the community! Read our posting tips, and learn how to earn ranks, levels and badges to get started.
Ask any devices or smart home question in the Devices/Security or Network Troubleshooting Categories.
Happy posting!
Ask any devices or smart home question in the Devices/Security or Network Troubleshooting Categories.
Happy posting!
More than one DHCP active at once



My internet connection is so unstable: it disconnects suddenly every now and then. My fingbox shows this alert DHCP not healthy and that I have more than one DHCP active at once. More than one DHCP active at once, 2: 192.XXX.3.1 (D8:0F:99:C2:64:55) on 192.XXX.3.0/24,192.XXX.10.1 (98:F1:99:B2:2F:D8) on 192.XXX.10.0/24. I've been looking for a solution for some time, and nothing's worked. I use an Apple computer, if this information is vital. Could someone please help me? Thanks in advance, and please stay safe.
Tagged:
0
Best Answers
-
DavidF Member Posts: 34
Abofrapa,
Can you tell us a bit more about your network? From what you are saying and Fing is reporting it sounds like you have two routers active at the same time, each with its own network (x.x.3.0/24 and x.x.10.0/24). If Fing is seeing both then the networks must overlay each other with would present a host of problems.5 -
DavidF Member Posts: 34
Abofrapa,
It sounds like both routers are trying to route for your internet services. If you can I would physically separate them - just allow your telephony devices (phones, SIP devices, etc) to connect to the NTT router. All of your internet devices should connect to the Softbank router. You may want to be clear with both providers (especially NTT) what services they are providing (i.e. billing) to you.
In any event, having both active on your network is bound to cause multiple problems - segregation or consolidation is key to you having reasonable performance.
Good luck!
David5 -
ProTecK Member Posts: 55
@abofrapa I have a hunch what is going on, I cant look up anything specific because you are not giving any specific info, like model numbers for those 2 devices, how the devices are interconnected, and what other devices are on your network.
You mentioned one was for your phone service. Exactly what type of service are you using? How is it connected?
I've come across this so many times it may also apply here. This NTT router, does it have 2 ethernet plugs and 1-4 analog phone plugs on it? A device like that would create a 2nd network on the 2nd ethernet plug. The only devices that should be connected to that 2nd plug would be VOIP specific. If you have that 2nd plug connecting back to your other router that is the problem.
I could probably spot the problem if you could give some model numbers and describe what connects to what. Do you know which device provides the wifi? Are your phones VOIP or analog?
We can guess at your problem all day but without this kind of info, it's not even an informed guess. Help me help you.
1
Answers
Thanks a lot. I'm going to implement the recommendations you've made, and I'll see how it works.
Most documentation I can find is in Japanese. My Japanese only goes as far as the little I have used since my year in Okinawa. Knowing Nagewaza and how to count isn't helping me here. If my Sensai only knew how little I know I never would have seen this Brown Belt.
This VDSL unit is something you didn't mention before? Starting at the handoff. (That sounds like its the VDSL line?)
Hell, The more I try and wrap my head around it the more you have totally lost me.
Let me make a sample below and you can try and fit your network into this way of mapping it.
I am going to list different devices here since I don't know where yours should fit in relation.
FROM the Wall:
Coax Cable > Coax connector [Cable Modem (bridged mode with no routing rules)] LAN ETH Plug> ETH Cable > WAN Port -[Router w/ WiFi]
[Router w/ WiFi] has 4 LAN Ports:
LAN1 > ETH Cable > WAN Port [Voip Router]
LAN2 > ETH Cable > ETH Plug -[Laptop]
LAN3 > ETH Cable > ETH Plug -[Printer]
LAN4 > Unused
WiFi > Any wifi devices
[VOIP Router] has 4 LAN Ports & 2 Analog:
LAN1 > Unused
LAN2 > Unused
LAN3 > Unused
LAN4 > Unused
Analog1 > RJ11 cable > [Analog Phone]
Analog2 > Unused