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My dhcp stops working when i connect a switch to my internet router. I managed somehow by adding ip manually for all devices

Dhcp not working because of a switch

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2 Answers

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  • 73 Answers

Try a crossover cable between router and switch. if the switch has an uplink port attach the router cable there with a straight through.

Posted on Oct 21, 2013

  • mohamed ali Oct 27, 2013

    Already done it and nothing happened. One more dhcp service is working but once you connect the router to the switch the dhcp stop working.

  • wingnut
    wingnut Oct 29, 2013

    I see that you have a basic unmanaged gigabit switch. What is our router model and version? You may need to disable the firewall settings, configure nat or something. Vague descriptions make it impossible to diagnose.

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  • 116 Answers

Which switch are you using? And which router?

Posted on Oct 21, 2013

  • 1 more comment 
  • mohamed ali Oct 27, 2013

    Gs608 v3 netgear switch

  • Peter DiGiovanni
    Peter DiGiovanni Jul 25, 2014

    If this is still a problem, please post a photo of your equipment.

  • Peter DiGiovanni
    Peter DiGiovanni Jul 25, 2014

    Your layout from the diagram does not look too different from what is demonstrated in the online materials: http://www.downloads.netgear.com/files/G...

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Posted on Jan 02, 2017

SteveRand
  • 210 Answers

SOURCE: Sending DHCP request across diffrent vlans

Hmm... on your DHCP server, try setting the "default router" IP for each pool to be the VLAN ID on the switch.

scope 172.16.0.0 /24
router 172.16.0.1

scope 10.20.8.0 /22
router 10.20.8.1

I think the DHCP replies aren't going back where they should. I've never done this without a router doing all the DHCP, but it does work and i've done it many times. Your config looks spot on for the switch.

Posted on Feb 05, 2009

redhaze89
  • 854 Answers

SOURCE: DHCP problem and router connection

Here are some troubleshooting steps that I suggest you try:

1. Check physical connections.

a. Connect the modem to the Internet port of the router. The Internet “i” LED on the front of the router should light up.
b. Connect the computer to one of the four LAN ports (i.e port 1, 2, 3 or 4) on the back of the router. The corresponding port light where you connected the computer should be lit up.

2. Access the router's web-based utility.

a. Please open any web browser like Internet Explorer or Netscape Navigator.
b. Connect to the router by typing http://routerlogin.com/basicsetting.htm or http://192.168.1.1 in the address field and click Enter or Return key.
c. A window will prompt for a user name and password. By default, the user name is "admin" and the password is "password".

Note: If you were unable to access the router's web-based utility, you may reset the router to restore the settings to factory default.

To reset the router:

a. Please push the reset button at the back of the router and release after 30 seconds.
b. Unplug the power adapter for 10 seconds and then plug it back in.

3. Configure the router.

If your Internet Service Provider is using a cable connection, please follow the steps below:

a. Click on Basic Settings under Setup tab.
b. Select No for Does Your Internet Connection Require A Login?.
c. Scroll down on the center page and look for the Router MAC Address section. Set it to Use computer MAC address and click on the Apply button.

If your Internet Service Provider is using a DSL connection, please follow the steps below:

a. Click on Basic Settings.
b. Select Yes for Does Your Internet Connection Require A Login?.
c. Select Other on the Internet Service Provider drop down box.
d. Enter your ISP's username (username@ISPdomain) and password. Then, click on Apply.


4. Power cycle.

a. Power off the modem, router and computers.
b. Turn on the power of the modem first and wait for it to initialize, the lights to stop blinking.
c. Power back the router and the computers. Check if it will be able to get online.

If you have wireless computers, you can connect them wireless to the router. Kindly follow the instructions below:


From the above configuration, please check if you can now access the Internet.

Posted on Aug 16, 2009

  • 7993 Answers

SOURCE: My switch used to work fine,D-link DES 1024D

Hello,
I suggest you reconfigure you network. Maybe your configuration authorizes only one IP adress on the network.

Try to reset your router to defaults to see if that solve your problem. After that you will have to reconfigure the router.

Hope it helps.

Posted on Sep 11, 2009

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1 Answer

Why am I losing internet speed when using router goes fro 60mps to 5-10 mps


how did you bypass the router ? what is connecting to the internet if you bypass the router ? question is the device connecting to the internet got a DHCP server and does the router have a DHCP server. What IP ranges are the two DHCP servers allocating.
You may need to switch off one of the DHCP servers in one of the two devices. Probably the DHCP servers are confusing each other .
Only my educated guess with the limited information on how your network devices interact. .

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Talk talk, technical assistance


How did you connect the computer to the router. If you are using a DSL modem it will have a DHCP server in it that is allocating IP addresses across your network. If you added the router to the computer via a hub or network switch what is the computers ip .
address. Remove the WI FI router - turn off P.C and then Go to cmd or dos prompt if windows based system and type in ipconfig and press enter to see if ip addresses are 10.0.0.2 if they are your dlink router uses 192.168.0.1 so you need to make the dlink router ip addressand subnet setting to match the Modem ip addresses of the DHCP server. Change the ip address of the dlink router to be 10.0.0.2 and change the modem to allocate DHCP IP addresses from 10.0.0.10 to 10.0.0.255. Only do this if IP addresses are 10,0,0,1 to 10.0.0.,254 on the desktop p.c with the dsl or cable modem connected.without the router being involved. (you may need to ask the ISP what the user name and password is of the modem and it should be ip address xx.xx.xx.1 so type this into a browser to change the modem settings. 10.0.0.1 or 192.168.0.1 just remember if the modem is 192.168.0.1 so is the Wi router from d-link and you will have an ip clash problem)
. How do you do this by ethernet connection from only the desktop directly with only the Wi FI . router. Go to a internet browser and type in the URL 192.168.0.1 and then change the router ip address to match what the DSL modem DHCP issues..
Page 14 of Router instructions see http://files.dlink.com.au/Products/DIR-615/Manuals/DIR-615_C2_Manual_v3.10.pdf
in the manual it states to use a direct ethernet connection for the setup program but you need to be connected to the internet for it to work but if the IP addresses are wrong or clashing will have no internet. You also want to set the modem as the DCHP server and disable the DHCP server in the set up of the wi fi tand set the WI FI router default gateway as the ip address of the Modem. if any DHCP server options in the WI FI router sert to the modem ip address. .

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1 Answer

How to configure router & switch


You shouldn't have to configure anything except the PC's should have IP and gateway set to auto.

Here is how it works:

A router connects two separate networks and manage the traffic between them.

In most home network applications the router connects your local group of computers and devices known as the LAN with the Internet, commonly called the WAN or Wide Area Network.

The router usually assigns unique Local IP addresses to all of the devices connected to it via a service known as DHCP. The addresses assigned by your router are private addresses http://en.wikipedia.org/wiki/Private_net... and are not routable across the Internet.

Dynamic Host Configuration Protocol (DHCP) is an auto configuration protocol used on IP networks. Computers that are connected to IP networks must be configured before they can communicate with other computers on the network. DHCP allows a computer to be configured automatically, eliminating the need for intervention by a network administrator. It also provides a central database for keeping track of computers that have been connected to the network. This prevents two computers from accidentally being configured with the same IP address. http://en.wikipedia.org/wiki/Dynamic_Hos...

Your cable or DSL modem will get a Public WAN IP address from your ISP's DHCP service. These public IP addresses are leased in blocks by your ISP and are Internet routeble. The modem is connected to the WAN port on your router. The router will manage the traffic between the devices on the LAN and the Internet.

If your 5 port switch is connected to one of the router's LAN ports and router's DHCP is on then it will configure the clients attached to It automatically.

Feb 04, 2013 | Computers & Internet

1 Answer

I am trying to connect my Dlink DKT-401 router to my Linksys cable gateway router. I am not getting internet access when connecting to the Dlink network


I DON'T THINK YOU CAN RUN 2 ROUTERS ON THE SAME NETWORK UNLESS ONE IS USED AS AN ACCESS POINT.
1. Connect as local device or bridge - If connecting the second router via Ethernet cable, plug it into one of the LAN ports on the first router. If connecting the second router wirelessly, ensure the second router is set for client mode. Note that some home wireless routers do not support client mode; these must be connected by cable. Check your router documentation for details on its client mode configuration support.

2. Check / change IP address - Most home network routers use a default IP address setting. Often, these default IP addresses will not work in a two router environment. Check the second router's IP address value and reset it if necessary to work within the valid address range of the first router (and to not conflict with any other device on the network).

3. Disable DHCP - To avoid IP address conflicts between all of the devices on the home network, only one of your two routers should assign addresses via DHCP. All mainstream routers provide an option to disable DHCP as part of the router's configuration screens.

Instead of adding a second wired router to an existing network, consider adding a network switch instead. A switch accomplishes the same goal of extending the size of a network, but it does not require any IP address or DHCP configuration, greatly simplifying configuration.
Readers Respond:

Dec 11, 2010 | D-Link Computers & Internet

1 Answer

I have a weird problem with my switch . It doesn't give me internet acces when i try to connect my pc with it but when i connect a router to the switch it does work . I tried everything : restarting my...


Do your service provider limits number of ip address (10.10.10.10) you can have? if they provide only one, you would need to use a router to share one public ip address. Sometimes it records the network address of your network device (00:00:00:00), and won't give u another ip if the device changed. If you have two routers in your network, turn off the dhcp on the second router, and use LAN ports and do not use the WLAN on the second router. if you want to manage the second router, give it an static ip from the first router. Bad port? Bad cable? Modem => router => PC/IPOD/switch or modem => router => PC/IPOD/Switch/ 2nd Router without dhcp and no WLAN ) Good luck

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I am trying to install a Netgear router after my switch. I end up having no internet on some of the computers connected to the hub and none on the router. If I configure the router as a dhcp client...


You'll want to configure your router as a dhcp server. Connect the switch to your router's lan port. Connect the remaining devices to a port on the switch. Your wireless access point should have it's dhcp server disabled. You can only have one dhcp server per network. The wireless can get it's address from the router's dhcp and the wireless client devices will get their ip address from the router, as well. If your wireless access point is a router with a wan/broadband port and some switch ports you will want to make sure that you are connecting to your Asus switch via one of the switch ports.
Be sure that your client devices are configured to get their ip address via dhcp and you should be surfing the interweb in no time flat.

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1 Answer

2 computers one internet. only one computer gets internet at a time.


Assuming you have connected the computers and the switches in this order:

INTERNET Router --> Switch--> 2 Computers

Also make sure that the main DHCP device whether its your main modem/router or any other device, they are set to assign IP's using DHCP and they can accomodate 2 computers. If DHCP is not enabled assign IP's manually.

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I have a DGL-4100 behind a Linksys DSL router 2 networks don't.


zSB(3,3) Installing a Two Router Network Installing a router to work as the second one on a home network requires special configuration. Do the following on the second router to ensure it (and the devices attached) function properly:
    1. Connect as local device or bridge - If connecting the second router via Ethernet cable, plug it into one of the LAN ports on the first router. If connecting the second router wirelessly, ensure the second router is set for client mode. Note that some home wireless routers do not support client mode; these must be connected by cable. Check your router documentation for details on its client mode configuration support.

    2. Check / change IP address - Most home network routers use a default IP address setting. Often, these default IP addresses will not work in a two router environment. Check the second router's IP address value and reset it if necessary to work within the valid address range of the first router (and to not conflict with any other device on the network).

    3. Disable DHCP - To avoid IP address conflicts between all of the devices on the home network, only one of your two routers should assign addresses via DHCP. All mainstream routers provide an option to disable DHCP as part of the router's configuration screens.

Instead of adding a second wired router to an existing network, consider adding a network switch instead. A switch accomplishes the same goal of extending the size of a network, but it does not require any IP address or DHCP configuration, greatly simplifying configuration.

Oct 10, 2009 | Computers & Internet

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Netgear SmartWizard Help


Is there an option to use a dynamically assigned IP address (also called DHCP)?

That's most likely the option you need, almost all home Internet providers use DHCP to assign the information you are asking for automatically to your Internet connected device (in this case, your router).

Let me know what options are available to you if neither Automatic or DHCP is.

Thanks!

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PS3 can't obtain IP address through LAN switch


wonderful! that's always a good thing to hear - sometimes it is the "make sure you're power cord is plugged in" problem, eh :)

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