1.There is no overhead in terms of CPU usage of the router as well as bandwidth between routers. When dynamic routing is used, packets are exchanged between routers and that uses bandwidth. That can be costly when they traverse across WAN links. The routers also need to process these packets and that consumes some CPU cycles as well.
2.It adds a certain degree of security since the administrator controls which routes the routers can know and learn.
- The disadvantages of static routing are:
1.The administrator needs to know the internetwork so well that he/she knows where each destination network lies and which is the next hop towards it.
2.Every change needs to be manually done on each router in the internetwork.
3.In large networks this can be unmanageable.
- To add a static route, use the following command in the global configuration mode