Industry Cellular Gateway
2.6 Routing
If you have more than one router and subnet, you will need to enable routing function to allow packets to find
proper routing path and allow different subnets to communicate with each other. Routing is the process of
selecting best paths in a network. It is performed for many kinds of networks, like electronic data networks
(such as the Internet), by using packet switching technology. The routing process usually directs forwarding on
the basis of routing tables which maintain a record of the routes to various network destinations. Thus,
constructing routing tables, which are held in the router's memory, is very important for efficient routing. Most
routing algorithms use only one network path at a time.
The routing tables record your pre-defined routing paths for some specific destination subnets. It is
static
routing
. However, if the contents of routing tables record the obtained routing paths from neighbor routers by
using some protocols, such as RIP, OSPF and BGP. It is
dynamic routing
. These both routing approaches will be
illustrated one after one. In addition, the gateway also built in one advanced configurable routing software
Quagga for more complex routing applications, you can configure it if required via Telnet CLI.
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