In my home network, I have to use AT&T's router. It is a Motorola NVG510.
Behind this router is my personal router, a dual band Netgear TL-WDR3500 with USB ports for my NAS drives.
The AT&T router connects to the DSL line, and has its wireless radios turned OFF.
- IPv4 Address:
192.168.1.254
- Subnet Mask:
255.255.255.0
- DHCPv4 Start:
192.168.1.64
- DHCPv4 End:
192.168.1.253
My Netgear router connects directly to one of the switches on the AT&T router.
- IP Address:
192.168.0.1
- Subnet Mask:
255.255.255.0
- Default Gateway:
192.168.1.254
I want to setup the Cascaded Router feature, but to do that I need to supply the following:
- Cascaded Router Address: The IP address for the router behind this device. The Cascaded Router Address should be in the LAN Private IP subnet range.
- Network Address: The Network Address that defines the range of IP addresses available to clients of the cascaded router.
- Subnet Mask: The subnet mask that with the Network Address defines the range of IP addresses available to clients of the cascaded router.
Everything I try gets kicked out as invalid.
For the Cascaded Router Address, I always enter 192.168.0.1
, since that is the defined as the router address on my Netgear router. That only leaves Network Address and Subnet Mask.
Network Address 192.168.1.253
, for example, is rejected because it is not in the network address given subnet mask 255.255.255.248
.
I got Cisco certified in networks about 10 years ago, but I was never able to get a job in networks. I can't remember how I am supposed to calculate the network address ranges and subnet masks anymore.
Can someone give me this information? I would also like to know how to go about calculating these for my information, just in case something changes down the road.
Best Answer
Here is what I got to work. (Update: see my comment below; this stopped working the next day.)
I had to configure the subnets. What worked for me was only allowing 1 IP address:
Next, I had to configure the firewall to allow IP Passthrough:
At this point, I rebooted the AT&T router modem.
While that was going on, I used my wireless network card to configure my Netgear router. I had to change the IP address, Default Gateway and Primary DNS:
By the time I was doing all of that, the Motorola router modem was through rebooting, and HERE I AM! :)
That was a lot of work for me!
Hopefully, someone comes along later and gets some good out of it.