Industrial Grade 4G Router Routing Concept
E-lins Technology’s H685 industrial-grade router is a
small industrial-grade wireless router with a single LAN port and a classic
industrial-grade design. It is easy to realize intelligent, safe, reliable and
stable wireless communication requirements. TDD/ fdd-lte, 4G, 3G network
optional.
1. Routing concept: Industrial
router routing is the activity of transferring information from the source
address to the destination address through an interconnected network. Routing
occurs at the third layer of the 0SI network reference model, the network
layer.
Routing: industrial-grade routers route packets from one
address to another. One route does not specify all routes, only one path from
the host to the gateway, and then the gateway forwards the packet to the
destination host or another gateway.
Industrial wireless router routing refers to the selection
of a route to send a message, while the gateway refers to any network equipment
that can complete the routing function. Industrial wireless router is used to
connect different networks.
Routing is done by the IP layer and does not necessarily
require a daemon to complete the routing on a host.
The packet distance is usually represented by a gateway
HOP number, called METRIC. The distance from the source address to the
destination address of an industrial 4G router depends on the
number of gateways the message must pass through. The number of spans from a
host to its direct network is zero, and the number of spans to a given network
is one if it can be reached through a gateway, and so on.
2. Gateway: the gateway connects two or more networks and
provides the routing function of industrial-grade 4G routers. The gateway
selects at the network layer, one gateway receives IP data from another
gateway, selects a route for it, and routes IP datagrams to other networks
according to the selected whole-network router. The gateway periodically checks
the state of the connected network connection.
The gateway routes the message to the specified
destination network via the specified full-network router, and the destination
network is responsible for sending the message to the destination host.
3. Route Type: a route does not completely describe a complete
path, it only defines the path from a host to a gateway segment, or a gateway
to another gateway segment.
TCP/IP typically searches the routing table in the
following order to find the best routing match:
(1) Host routing: define the route from gateway to a
specified host;
(2) Network routing: define a route from the gateway of
the industrial router of the whole network to a specified network segment or
network;
(3) Default route: if the host route and the network
industrial-grade LTE router route do not define a route to the destination, the
default route will be used.
4. Routing table: routing is defined in the core routing table. Each
entry in the routing table of a full-netcom industrial router has two
components: the destination IP address and the gateway address. Routing tables
are divided into the following three categories:
(1) Direct routing item: when the destination address and
the local address are in the same network segment, direct routing item is used.
(2) Indirect routing items: when the IP addresses of the
source and destination hosts are not in the same network segment, indirect
industrial-grade all-network router routing items are used. The route to the
destination host is through one or more gateways. The source host only needs to
access the first cross-gateway.
(3) Default routing item: if the target IP is not in the
above two whole-network industrial router routing items, the default routing
item will be used
5. Routing algorithm:
It can be seen from the above algorithm that both host and
gateway are involved in routing activities. When an application on a host tries
to communicate with another host, multiple datagrams are generated. The IP
routing mechanism determines which host or segment the datagram should be sent
to based on the network address portion of the destination IP address.
6. Routing mode: there are three main ways to establish the routing:
implicit mode, static mode and dynamic mode.
Industrial LTE router routes are
defined in the core routing table, and generally up to 32 routes can be
defined. These route definitions include information about the local reachable
network, gateway information to the remote network, and the number of crossings
to these networks.
An implicit way to define the route of an industrial
network - wide router is to perform and complete the configuration of the
adapter.
The static route is set by the network administrator and
needs to be manually maintained.
Dynamic routing is where the daemon updates the routing
table automatically. Typically, the routing daemon periodically listens for all
routes to refresh confidence and broadcasts the information received from the
routing table of a full-netcom industrial-grade router so that other routers
can update their routing tables.
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