I have a comcast cable connection at home. I have a Motorola SB5101U cable modem and Motorola NVG510. What I want to do is connecting the cable modem to the comcast cable and have internet access, and to connect the NVG510 modem through ethernet, then to have a wireless LAN at home that I can use to connect to internet.
SB5101 is a one-port ethernet and usb cable modem.
NVG is a 4-port ethernet wireless dsl modem.
When I connect the dsl modem to the cable modem, I simply can't access the internet, without knowing whether the modems can communicate (the dsl modem's admin page does present any related information, or I couldn't find otherwise).
I applied a suggested method which is setting the dsl modem's IPv4 address from the cable's modem's IPv4 address and DHCPv4 start and end addresses from the same address space (same address for both). This way I only can access to internet from one computer only if it is connected to the dsl modem via ethernet. On wireless I got no internet connection and I got an IP conflict error. Then I changed the DHCPv4 end address on the dsl modem and provided an IP interval for DHCP, this way I could connect multiple computers to the dsl modem through wireless or ethernet, but only one computer having an ethernet connection could access the internet.
This is my question and the answer I got.
Is there some way I can't do what I want as described in the beginning.
Thanks in advance,
Turn off the NVG510's DHCP server and connect one of its LAN ports to the SB5101. You can also follow the instructions you got in the answer to your question on Yahoo which also seems correct.
After our ISP changed something in our DSL modem, our wireless router suddenly stopped working properly.
Before, our DSL modem was accessible via a local address (192.168.1.1). We got a wireless router (Linksys WRT54GC), and configured our home network like so:
Then, a few months ago, our ISP called to say they're sending someone to adjust some settings in our DSL modem. After the reconfiguration, our DSL modem was no longer directly accessible. Whether it was our PC or our wireless router, whatever was directly connected to the DSL modem gets assigned a public IP address via DHCP.
That was when our wireless router went bonkers. At first, we just experienced frequent disconnections, and we had to reboot our wireless router or let our DSL modem reconnect to our ISP. A couple of weeks later, our wireless router stopped serving us entirely.
My brother, who's a bit more hardware-savvy than me, says that the easiest way to probably fix it was to set out wireless router to act as a bridge. He says, that way, each device connected to it would be assigned an IP address by our ISP. We checked our wireless router's control panel, but couldn't find anything to set it to bridge. We later learned that Linksys WRT54GC routers (this is the compact model), well, SUCK, in terms of configurability. It was also impossible to re-flash it with open source firmwares.
What else should I check and try to reconfigure?
Do I need to change our wireless router?
My take on this is that you should always keep router and modem separate. I know others who have a combo modem installed, which includes the router, the wireless access point AND DSL modem. Although it will likely end up being more expensive, keeping components separate is a better long-term strategy.
Usually, the DSL modem should stand by itself, providing connectivity to the DSL service, no more. Once you have an external IP connection by the modem, you should have a DSL client, such as a router that will handle the DSL on the "client" side. This router can then route multiple internal connections, as well as providing wireless access point. This way, you also have better control on every aspect of your internal network, be it the IP address range, the wireless protection and settings, etc.
If the technology changes later on the router side, you can simply change the router, and the modem will not have to be changed.
If your provider locks you in a specific hardware/router configuration, I would simply chane to another provider. I don't know how the market works in your area, but in Canad, the market is open, and I chose not to go with the best-known provider. instead, I use another one, which gives me all the flexibility I need. And my internal router is my own business, nobody else's.
Have a nice day :-)