D-Link xStack DES-3800 Series User Manual page 152

The diagram above shows the network from the viewpoint of Router A. Router A can reach 192.128.11.0 through Router B with a
cost of 10 + 5 = 15. Router A can reach 222.211.10.0 through Router D with a cost of 10 + 10 = 20. Router A can also reach
222.211.10.0 through Router B and Router C with a cost of 10 + 5 + 10 = 25, but the cost is higher than the route through Router
D. This higher-cost route will not be included in the Router A's shortest path tree. The resulting tree will look like this:
xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch
Figure 8- 16. Constructing a Shortest Path Tree
Figure 8- 17. Constructing a Shortest Path Tree
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