Hi

Having looked at most of the other posts about setting up BT Business Broadband static IPs on a Vigor2850n I still have some questions.

I have been provided with the following by BT:

You’ve ordered a range of Static IP addresses, which contains 8 addresses from 217.xxx.xxx.129 to 217.xxx.xxx.133. Three of these are reserved:
network address: 217.xxx.xxx.128
router/Hub address: 217.xxx.xxx.134
subnet mask address if you have 5 Static IP addresses: 255.255.255.248

My questions are:

1. Do I set the WAN IP or do I let that assign dynamically?
2. If I do set it, is that the network address above?
3. Can I set the static IPs (217.xxx.xxx.129 to 217.xxx.xxx.133) as WAN IP aliases?
4. If not, must I create an IP-routed sub-net using the router/Hub address and sub-net mask above?
5. Is there anything I've missed?

Thanks

Robin

Hi robin,

You should set the WAN static address as .134, this can be done from the WAN Internet access page.

You then have a choice of how to use the rest of your IP addresses, you can add them to the WAN IP alias section and use them behind a layer of NAT. OR you can use an IP routed subnet to configure them directly to the LAN interfaces of devices running behind the router. If you have enough addresses you can actually do both.

The choice depends on your requirements. Most people will just use the IP alias option and create DMZ's for particular WAN IP addresses. There are also many valid reasons for running the IP routed subnet (VPN's spring to mind) so it is just a case of choosing the configuration which best suits your needs.

I had a reply on the BT Business forum which appears to be working:

Hi, this is just my opnion but would be best to get a confirmation from them.
1. You need to assign them statically.
2. Yes
3. With the Subnet that you gave, you can assign .129 to .134
4.
5. That's it. You can just assign a private IP in your LAN side of the router

Hi Frag

Didn't see your response minutes before mine and only just noticed it! Been having a couple of issues and think it might be down to the wrong static router IP. Will change it and let you know.

Thanks

Robin