IP Address – The address used by the router for local area network communication. Changes to this parameter may require a restart to devices on this network.
Each network must have a distinct IP address. Most users will want an address from one of the following private IP ranges:
10.0.0.1 – 10.255.255.1
172.16.0.1 – 172.31.255.1
192.168.0.1 – 192.168.255.1
Note
The final number does not have to be 1, but it is a simple, logical convention for routers that leaves higher numbers free for other devices. Note that /31 networks are supported with Cradlepoint routers.
Netmask – (Default: 255.255.255.0) The netmask controls how many IP addresses can be used in this network. The default value allows for 254 IP addresses.
IPv4 Routing Mode – (Default: Network Address Translation [NAT]) Each network can use a unique routing mode to connect to the internet and other local networks. NAT is desirable for most configurations. Select from the following options in the drop-down list:
NAT – NAT hides private IP addresses behind the router's IP address. This is the simplest and most common choice for users, because NAT does the translation work for you.
Standard – NAT-less routing. If you select Standard, you must separately configure your IP addresses so that they will be publicly accessible. Typically, you will not select this option unless you have a specific reason to bypass NAT.
IP Passthrough – IP Passthrough passes the IP address given by a cellular modem (WAN) through the router to Ethernet (LAN). All Ethernet ports must be in LAN mode (or disabled) and Hotspot, VPN, and GRE must be disabled. Any wireless interfaces must be removed from this network to enable IP Passthrough. The easiest way to enable IP Passthrough mode is with the IP Passthrough Setup Wizard (SYSTEM > Setup Wizards > IP Passthrough Setup).
Loopback – Use loopback to create a local network interface on the router with an assigned, single-host IP address and with no attached external interfaces.
Passthrough Reservation – The IP Passthrough connection will be reserved for the client at the specified MAC address (only available when IP Passthrough is selected for the IPv4 Routing Mode).
Subnet Selection Mode (only available when IP Passthrough is selected for the IPv4 Routing Mode)
Automatically Create Subnet – The router will dynamically create the subnet mask based on the WAN connection being used. (Recommended)
Force 31 Subnet – Adheres to RFC 3021 to override the default subnet mask of the modem to 255.255.255.254 and the gateway to "+1" of the IP address of the LAN client.
Force 24 Subnet – Similar to Force 31 mode but uses a subnet of 255.255.255.0 for compatibility with older network equipment that may not support /31-sized subnets.
Custom Settings – Use the Custom Gateway and Subnet settings to override the default modem settings.
Ethernet Cycle Time – The amount of time to disable the Ethernet ports when reconfiguring IP Passthrough clients. A value of 0 indicates the Ethernet ports should not be disabled. In most cases, the default value should be acceptable. This option is only available when IP Passthrough is selected for the IPv4 Routing Mode.
Always Proxy ARP – This device will answer the ARP queries for the network addresses it can route to and will offer its own MAC address as the final destination. When unchecked, the system may turn on or off proxy ARP depending on operating configuration.
Secondary IPv4 IPs – Enables secondary IPv4 addresses for the interface, to allow having multiple IPv4 addresses on an interface. All IPv4 IPs used as secondary IPs are addressable on the network but will not offer DHCP on the IP subnet. Any clients that request DHCP on the interface can only receive an IP from the primary IP subnet (if DHCP is enabled.) As a result, for a client to access the LAN on the secondary IP subnet, you must assign it a valid static IP address in the secondary IP subnet's range.
Secondary LAN IPs can be configured for the following routers with the specified NetCloud OS versions::
E3000-5GB (7.25.20)
E300 (7.25.21)
S700 (7.25.20)
R920 (7.25.21)
R1900 (7.25.21)
R980 (7.25.21)
E400 (7.25.40 RC2)