11000000.10101000.00111010.11000000

11000000.10101000.00111010.10101111

11000000.10101000.00111010.10000001

11000000.10101000.00111010.10110001

172.29.15.221/28

172.29.15.205/28

172.29.15.208/28

172.29.15.223/28

SW1(config)#spanning-tree mode rapid-pvst

SW1(config)#spanning-tree bpduguard disable

SW1(config)#spanning-tree vlan 1 root primary

SW1(config)#spanning-tree portfast default

9

12

15

5

192.168.140.191

192.168.140.92

192.168.140.159

192.168.140.63

3

19

5

20

R2(config)#ip route 172.30.2.0 255.255.255   S0/0/1                  

R2(config)#ip route 0.0.0.0 0.0.0.0  192.168.4.10                        

 R2(config)#ip route 172.30.2.0 255.255.255.0  192.168.4.9        

R2(config)#ip route 0.0.0.0 0.0.0.0  192.168.4.9