Allied Telesis AT-9724TS, Инструкция по установке и эксплуатации

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Shortest Path Tree
To build Router A’s shortest path tree for the network diagrammed below, Router A is put at the root of the tree and the smallest cost link to each destination
network is calculated.
Figure 6- 98. Constructing a Shortest Path Tree
The diagram above shows the network from the viewpoint of Router A. Router A can reach 192.213.11.0 through Router B with a cost of 10+5=15. Router A
can reach 222.211.10.0 through Router C with a cost of 10+10=20. Router A can also reach 222.211.10.0 through Router B and Router D with a cost of
10+5+10=25, but the cost is higher than the route through Router C.This higher-cost route will not be included in the Router A’s shortest path tree.The
resulting tree will look like this:
104
Allied Telesyn AT-9724TS High-Density Layer 3 Stackable Gigabit Ethernet Switch
1 3 5 7 9 11
2 4 6 8 10 12
13 15
14 16
17 19 21 23
18 20 22 24
25 27
26 28
29 31 33 35
30 32 34 36
1 3 5 7 9 11
2 4 6 8 10 12
13 15
14 16
17
19 21
23
18 20 22 24
25 27
26 28
29
31 33
35
30 32 34 36
1 3 5 7 9 11
2 4 6 8 10 12
13 15
14 16
17 19 21 23
18 20 22 24
25 27
26 28
29 31 33 35
30 32 34 36
1 3 5 7 9 11
2 4 6 8 10 12
13 15
14 16
17 19 21 23
18 20 22 24
25 27
26 28
29 31 33 35
30 32 34 36
Router A
Router B
Router C
Router D
10
8
5
5
10
10
10
128.213.0.0
192.128.11.0
222.211.10.0
Router A
Router B
Router C
Router D
128.213.0.0
192.213.11.0
222.211.10.0
0
10
10
10
5
5
10