I have a Leased line with a Cisco 1700 series router on it.
I do not have the access to it as it has been provided by the ISP.
All I have been given is the IP range information for it.
For example puposes:
Range given is : 22.214.171.124/29
This gives me a wan ip of *.233 and 4 fixed IPs at .234 .235 .236 .237
Then one Netgear FVS318 attached to this which had a WAN IP of .234 asssigned to the WAN port and Gatway of .233.
The internal/LAN range being 10.0.0.x
But I wanted to use an additional WAN IP so....
Being new to using this I just added a switch between the single port on the Cisco 1700 and the Netgear FVS318. Still worked fine. Then added another FVS318 to the switch and gave it a WAN IP of .235 and Gateway of .233.
That all worked fine with no problems as far as I can see.
Also added a PC to the switch and gave it an IP of .236 and that works fine too ( just as a test )
But... I attached a SonicWall TZ210 in much the same manner giving it's WAN interface an IP of .237. However as soon as the device is attached everything else loses it's network connectivity. The only way to get it back is disconnect the WAN port of the TZ210 from the switch ( switch conected to Cisco 1700/Leased line ). Then power off the other routers and back on.
So the SonicWall TZ210 just kills everything else.