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by cphillips77

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I am currently working in a medical office that has just installed a new server and are using a Netopia Modem R2020. They want to use broadband and were told to hook a router to the Netopia and they would be fine. Well, still no internet connection and I can't seem to get much help. Here are some facts:

Netopia Modem R2020 - has and 8 port hub
DI-604 Router
OS Windows 2000
Current Settings:
IP Address - 172.20.1.102
Subnet mask - 255.255.255.0
Default gateway 172.20.1.30
3 computers
1 server
1 impact printer
1 laserjet

I can't get the computers to see the router...the Netopia sees the router. The router has a default address and I have brain lock. Would appreciate any ideas on how it can be rectified.I would appreciate any help here.

8 replies

by maxwell edison

DHCP, Dynamic Host Configuration Protocol, is a communications protocol that lets network administrators manage centrally and automate the assignment of dynamic IP (Internet Protocol) addresses in an organization's network.

A router can be configured to act as a DHCP server for your network - which is probably the default setting. Your server could be (and probably is) also configured as a DHCP server. You can't have two DHCP servers in the same network.

If this is the case, you could disable DHCP at the router, change the LAN side IP address in the router to something that fits within your IP addressing scheme, and point the default gateways on all the client machines to that new router IP address.

by rabbit_runner

Lets take this one step at a time. There is some information that is not in the discussion, but I will attempt to cover as many options as possible.

1. The Netopia modem connects to your ISP. Is this DSL, ISDN, T1, or what? In any case, your modem will have a connection to the ISP, and then a cat5 connection for your network. This should be connected directly to the WAN link on your router.
2. In your router you need to configure it to match your ISP connection settings. If you have a static IP, then set the WAN of your router with that IP address. If you have a DSL connection, set your router with PPPoE settings. Then enter the account name and the password, plus any other settings given by your ISP.
3. On the LAN side of your router, you will need to set the IP address for your internal network. NOTE: this should NOT be a public IP address. The 172.20.1.102 is a public IP. If this is a static IP and has been given to you by your ISP, then enter this setting into theWAN port as a static IP on your router. The LAN port needs to be a private (non-routable IP, such as 10.xxx.xxx.xxx or 192.168.xxx.xxx
4. Now set your IP addresses on your internal network to match the LAN port of your router. This LAN port on your router becomes the default gateway to be used by your computers.
5. If your are using DHCP from your server, set the scope options of your DNS servers of your ISP, your default gateway which is on your Router, and the addresses for your internalnetwork.

by rabbit_runner

6. If you are not using DHCP, you will need to configure each host on your network with the specific IP address you wish to assign, default gateway, DNS servers, etc.
NOTE: From what you are stating, you will not be able to use your modem as a hub. The ports on this modem, because of being connected to the internet will be public ports. You do NOT want to put your internal network on this hub. You should get a different hub/switch and use that for your internal network. Connect your LAN port on the router to this hub, and then all of your hosts and devices to the hub.

Hope this helps.

by cphillips77

It does and it did. After figuring out the setup and realizing some bad input from the field engineer...things are up and running.

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