All CradlePoint Routers occupy a primary and secondary IP address when they are in operation. This allows things like DNS services and HTTP redirects for User Login, Error messages, etc. to function properly on the CradlePoint router.
By default the CradlePoint router IP address is set to 192.168.0.1, this means that it automatically occupies 192.168.0.2 as well due to it being the next available IP address. The router can be configured to use different IP addresses by following this link for Series 1 or 2 products and this link for Series 3 products.
When changing the router IP address, it’s important to note that it will always occupy the IP you set it to, as well as the next IP address. No other device attached to the router can be set to that address.
Also, the router’s IP addresses must not fall outside the usable range of IP addresses. By default, the router is set to use a network that goes from 192.168.0.1 to 192.168.0.254. So the router couldn’t be set to use any IP above 192.168.0.253 because it would also need to use 192.168.0.254 as a secondary IP address.