Rv345 wan 2 issue

[computerjames61478]

I just purchased a rv345. I have 2 static ips from my isp.  1 is working fine, I can't seem to get the static ip 2 to work. When I add ip 2 to wan 2  I can't click apply,  I get a red box saying The IP Address setting conflicts with an existing interface.

Static ip 1 is 66.x.x.152 static ip 2 is 66.x.x.205.  The xs are identical numbers only thing different between these 2 static ips are the last number. 

If I can't add this 2nd static ip this way,  where do I add it, in routes? If so, how do I do so. 

My 2 static ips are from the same isp and only 1 modem,  I do not have 2 seperate internet connections.   Please help and thank you, I'm not at all familiar with cisco products. 

[Peter vds]

What is the subnet mask you use on WAN 1 and WAN 2?

[computerjames61478]

Thank you for your help. Isp gave 255.25.255.0. I believe I may have just
accomplished what I needed by using static nating. I will find out later
today when company opens, tested ok from my home. Thanks again.

[youtv]

Hi! We have the same problem: 

IP for WAN1 = 46.XX.YY.12

IP for WAN2 = 46.XX.YY.13

SUB: 255.255.255.240

We can't add the second IP on WAN2 (static IP) because we always get the error message: "The IP Address setting conflicts with an existing interface." How can we solve that major issue?

[dgingrich]

Using two IP addresses from the same network is not possible.  You need to get a separate Internet connection for WAN2.