Adaptability to network topology changes
The different configuration of the network determines its ability to adapt to changes in the network topology, which depends on whether a dynamic routing protocol is used in the network.
Static routing information can guide the normal forwarding of packets. In the network shown in the figure, in order to reach the target network N2, configure a static route on router A to point to router D, and configure a static route on router D to point to router C, so that packets sent from network N1 to N2 can be After reaching the destination network N2 through routers A, D, and C.
But if there is a problem with the path from Router A to D, Router A cannot send packets to Router D according to the static routing instructions. If you want to ensure the smoothness of the network, the network administrator must manually configure a static route through Router B, so that the message can pass through Routers A, B, and C, and finally reach the destination network.
If a certain dynamic routing protocol (such as RIP protocol) is running in the network, the situation will be different. When the route through Router D fails, the routing information between the routers will be transmitted through the dynamic routing protocol, and another route to the target network via Router B will be automatically discovered, and the routing table will be modified to guide the correct forwarding of the packets.
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