Split-Horizon in EIGRP
Split-horizon in EIGRP network can be a bit confusing. Following is a short example. Going back to basics, split-horizon is a loop prevention rule, which states that a router should not advertise a route through the interface it learned the route on. Take a look at Figure C-5 for an example.
Figure C-5. Split-Horizon in EIGRP
In this figure, Router A is advertising the 192.168.10.0/24 network to Routers B and C. The numbers indicated on the links between the routers represent the bandwidth configured on the links rather than the total metric or some other measurement.
If you examine the EIGRP topology table for each ...