STP+HSRP

R1:

en

vlan database

vtp server

vtp domain jiajia

vtp password jiajia

vlan 10 name wangguan

vlan 20 name caiwu

vlan 30 name shichang

exit

conf t

spanning-tree vlan 10 priority 3276 spanning-tree vlan 10 root primary spanning-tree vlan 20 priority 3277 spanning-tree vlan 20 root secondary spanning-tree vlan 30 priority 3276 spanning-tree vlan 30 root primary int vlan 10

ip add 192.168.10.1 255.255.255.0