Posted: Sat Aug 05, 2023 11:12 Post subject: DD-WRT as DHCP server on home network
I'm trying to use DD-WRT as the DHCP server on my home network - see diagram:
Internet and local network are OK on DD-WRT and the middle router.
Local network works OK from the Broadband router, but internet doesn't work when connected to it's LAN and WiFi.
Obviously if I turn on DHCP on the Broadband Router and off on DD-WRT it's all good, but then I would have to configure all my static IPs on the Broadband router.
Does anyone know what to set on the Broadband router so that its own LAN ports can see the internet properly with its DHCP is off?
Posted: Sun Aug 06, 2023 0:06 Post subject: Re: DD-WRT as DHCP server on home network
wiredcharlie wrote:
Does anyone know what to set on the Broadband router so that its own LAN ports can see the internet properly with its DHCP is off?
I only zoomed in at your diagram at this stage. And it seems strange to me that you have the DHCP server, not immediately after the ADSL connection, but after two other routing devices on the network.
It's counter-intuitive to place a critical function of your network (i.e. assigning identities to devices prior to its knowing which IP address (device) to send/receive traffic to and from.
Its like placing a traffic light behind the traffic on the road instead of in front.
The Broadband router is in the office room where the telephone line is accessible and it provides 1Gbs LAN. This connects to the the middle router (which is in the loft space for good wifi coverage) and also 1Gbs LAN. The DD-wrt router is 100Mbs and so is at the end where the TV is. The idea is that using DD-wrt as the DHCP server provides convenience in terms of retaining network configuration, static IPs etc when changing the Broadband router when the next bargain broadband offer comes along. I am fully prepared to find out that you guys aren't smart enough to make this topology work properly either
...but I figured I could try asking; and I am grateful.
Quote:
It's counter-intuitive to place a critical function of your network (i.e. assigning identities to devices prior to its knowing which IP address (device) to send/receive traffic to and from.
Really?
I don't think the problem is with the DD-wrt router, because the only connections not working properly are clients plugged directly into the Broadband router.
I am fully prepared to find out that you guys aren't smart enough to make this topology work properly either Wink
It is not a problem to configure it correctly.
But I won't bother feeding you with a spoon, because a number of configuration details are missing here.
and I'm not getting paid to fix any garbage configurations.
In addition, you do not listen to what the experienced users say, so your problem.
See what dnsmasq says about it if you specify the router IP as "local DNS".
Code:
Aug 6 10:48:05 DD-WRT daemon.warn dnsmasq[19959]: ignoring nameserver 192.168.1.1 - local interface
Your statement cannot be correct that it doesn't work without "local DNS" and that it is functionally relevant.
Firstly, if I knew what I was doing I would have solved this by myself, and I agree that I don't understand what I'm doing.
OK, so DD-wrt helpfully ignores my stupidity.
I confirm that if I set Local DNS to 0.0.0.0 it makes no difference, clients connected to middle router and DD-wrt work properly and clients connected directly to the Broadband router appear to connect to websites but then cannot complete downloading a page.
Please understand that I am trying to fix the bit that doesn't work, not the bit that does work anyway, despite my stupidity.
I can easily solve all this by enabling DHCP on the Broadband router and disabling the DHCP server on DD-wrt. But I want to avoid copying my static IPs across.
So, I will be able to manage without your spoon, ho1Aetoo, but I was hoping that someone here would see through this problem in a way that I cannot.
I don't think the problem is with the DD-wrt router, because the only connections not working properly are clients plugged directly into the Broadband router.
In case you need clarification of what ho1Aetoo wrote.
Your current layout (as you described) is not the logical way in terms of data packet flows despite it partially works. This makes it harder to explain while you maintained your incorrect assumption.
But here are a few hints in my final post for you however.
- ADSL2 D/L speed is 200mbps maximum (my understanding of current ADSL technology). So, your 1gbps broadband router D/L speed is still maxed outat 200mbps DL.
- It's better to place your broadband router in Bridge mode.
- The DHCP server router should be the next one connected to the broadband router. And follow from there.
- It's better to place your broadband router in Bridge mode.
- The DHCP server router should be the next one connected to the broadband router. And follow from there.
The only drawback to placing the ADSL router in bridge mode is that if the LAN ports are required for the network's assets' connectivity, then an additional unmanaged switch would be required. Definitely agree that the DD-WRT/DHCP server should be in between ADSL router and the other router. We presume that the other router is not DD-WRT supported. _________________ "The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep." - Robert Frost
"I am one of the noticeable ones - notice me" - Dale Frances McKenzie Bozzio
DD-WRT is a third-party, open-source firmware that can be installed on certain routers to enhance their functionality and features. One of its capabilities is acting as a DHCP (Dynamic Host Configuration Protocol) server on a home network. DHCP servers are responsible for assigning IP addresses and network configuration information to devices (such as computers, smartphones, and tablets) that connect to the network. Instead of manually configuring IP addresses on each device, the DHCP server automates this process, making it easier to manage and maintain a network with multiple devices. If you want to play Roblox Mod Apk game then visit it. When you use DD-WRT as a DHCP server on your home network, it means that your DD-WRT-enabled router takes on the role of managing IP address assignments for all devices that connect to your network. This is particularly useful in a home setting where you have numerous devices coming and going, as it simplifies the process of connecting devices to the network.
By configuring DD-WRT as a DHCP server, you can ensure that each device connecting to your network is assigned a unique IP address and appropriate network settings. This helps in preventing IP address conflicts and streamlining the network management process. Keep in mind that proper configuration of the DHCP server's settings, such as IP address range, subnet mask, and lease duration, is important to ensure smooth operation of your home network.
In essence, using DD-WRT as a DHCP server on your home network improves network management efficiency and makes it easier for devices to seamlessly connect and communicate on the network without manual IP address configuration.
