mstp+vrrp经典案例 LSW3 sys sys LSW3 VLAN 10 int e0/0/3 p l a p de vlan 10 int e0/0/1 p l t p t al vlan all int e0/0/2 p l t p t al vlan all !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! LSW4 sys sys LSW4 VLAN 20 int e0/0/3 p l a p de vlan 20 int e0/0/1 p l t p t al vlan all int e0/0/2 p l t p t al vlan all !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! LSW1 sys sys LS VLAN b 10 20 int g0/0/3 p l t p t al vlan all int g0/0/1 p l t p t a