In the Industrial Internet of Things (IIoT), the cellular modem router is not only responsible for the transmission of data,It also often has routing capabilities that allow the device to access the network more flexibly.This article will introduce the router function of cellular modem router and the setting method of LAN-wan cascade in detail.
The router function of cellular modem router mainly refers to its network routing capability.Enables the device to forward and route data between different network segments. This function usually includes the following aspects:
Static routing: a cellular modem router can be configured with a static routing table that specifies the forwarding paths for packets between different network segments.
Dynamic routing: Some high-end cellular modem router devices also support dynamic routing protocols, such as RIP and OSPF.It can automatically learn and update routing information to adapt to changes in network topology.
NAT (Network Address Translation): The cellular modem router usually supports the NAT function and can translate the private IP address into the public IP address.So that the internal equipment can be accessed through the public network.
VPN (Virtual Private Network): Some cellular modem router also support VPN function, which can establish an encrypted virtual channel on the public network.Ensure the security of data transmission.
LAN-wan concatenation is the connection of cellular modem router devices to local area networks (LANs) and wide area networks (WANs),Realize the transmission of data across network segments. The following is how to set up a LAN-wan cascade:
Hardware connections: First, you need to physically connect the cellular modem router device to the LAN and WAN.Typically, a cellular modem router has multiple network interfaces connected to switches or routers on LANs and WANs.
Network configuration: Log in to the management interface of the cellular modem router and configure network parameters.You need to set network parameters such as the correct IP address, subnet mask, and default gateway for the cellular modem router.To ensure that it can access the network correctly.
Routing configuration: configure the routing function of cellular modem router according to actual requirements.If a static route is required, a routing table entry needs to be added manually;If you need to use dynamic routing, you need to configure the appropriate routing protocol.
NAT configuration: If the internal device needs to be exposed to the public network, NAT configuration is required.Map the private IP address of the internal device to the public IP address of the cellular modem router, and set the corresponding port mapping.
VPN configuration: If you need to use the VPN function, you need to configure the corresponding VPN protocols and parameters, such as PPTP, L2TP, IPSec, etc.
Testing and debugging: After the configuration is completed, testing and debugging are required to ensure that the cellular modem router can access the network normally.And realize the trans-network transmission of the data.
The router function of cellular modem router provides great flexibility for the network access of industrial Internet of Things devices.By reasonably configuring the routing function and network parameters of the cellular modem router,Data transmission and access of the device between different network segments can be realized.The LAN-wan cascading method enables the cellular modem router to access the local area network and the wide area network simultaneously,Realize the transmission and sharing of data across network segments. In practical applications, it is necessary to configure and debug according to specific needs and scenarios.O as to ensure that the cellular modem router can work properly and meet the actual application requirements.
