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Assign static IP to Linksys Modem Router

flex12345
Member
Good morning, I purchased 5 static IPs with my broadband package. Due to technical problems with the BT router (download problems, unstable internet connection), I decided to buy an ADSL2+ Modem Gigabit Router and the internet connection works fine. Now I am trying to assign one of the five IP addresses to the modem and am somewhat stuck. First of all it looks like I am getting a new IP address every time I connect to the internet. If I attempt to configure one of the provided IP addresses, the internet connection is cut completely. Is it generally possible to use PPPoA and static IP addresses and how would that theoretically work? Does anyone have experience with Linksys routers and static IP addresses in PPPoA environments? Thanks in advance and best regards
1 REPLY 1

a-hill
Grand Master

Hi flex12345

 

Strictly speaking, the 5 IP's you have are designed to work with devices behind the router and your Linksys is meant to act as a gateway for those IP's to route over, by design your routers own WAN port will be assigned a dynamic IP, this is normal. With a typical setup you would connect dynamicaly, set the routers own IP as the gateway of your static range and the subnet of 255.255.255.248... it's up to yourself if you want to set your DHCP range as your 5 available IP's. From here you need to disable NAT on the WAN port then assign the IP's as required to devices on your network.

 

The method above is how most routers work, not many routers allow the setup of dual subnets, the BT routers allows both NAT and no-NAT as it has a separate public network service running specifically for multiple static IP's.

 

However, and I must explain we wouldn't normally advise this, but if it works then it works. You can sometimes specify one of your IP's on the WAN port of your router, as long as it can obtain the subnet and gateway dynamically from the ISP, this then gets treated as a single static for your connection. If it works that's good, if not then there's not much we can do as technically it's not an advised setup.