3560_1(config)#interface range g1/1-2
//进入接口组 g1g2(千兆接口)
3560_1(config-if)#switch trunk enc dot1q
//(g1g2)接口封装模式设置802.1q
3560_1(config-if)#switch mode trunk
//(g1g2)接口模式设置干道模式(与交换机互联)
3560_1(config-if)#channel-group 2 mode on
//绑定太网通道(两条物理链路绑定条逻辑链路增加带宽两条千兆接口链路绑定条2千兆链路)组号2
3560_1(config)#spanning-tree vlan 50 root primary
//设置交换机vlan50树主根(PVST+协议)
3560_1(config)#spanning-tree vlan 51 root secondary
//设置交换机vlan51树根(PVST+协议)
3560_1(config)#int vlan 50
//进入vlan50SVI(虚接口)
3560_1(config-if)#ip add 182.168.50.2 255.255.255.0
//配置IP(不用说吧)
3560_1(config-if)#standby 3 ip 182.168.50.1
//G3虚址 (配置vlan50HSRP热备份路由虚拟网关址)
3560_1(config-if)#standby 3 pri 150
//设置优先级默认100 (明显台三层交换机vlan50跃路由要vlan50数据包都由台三层交换机转发)
3560_1(config-if)#standby 3 preempt
//配置抢占(不用说吧配抢)
3560_1(config-if)#standby 3 track g0/48 90
//跟踪联链路down优先级降90
3560_1(config)#int vlan 51
//进入vlan50SVI(虚接口)
3560_1(config-if)#ip add 182.168.51.3 255.255.255.0
3560_1(config-if)#standby 4 ip 182.168.51.1
//(配置vlan51HSRP热备份路由虚拟网关址)
3560_1(config-if)#standby 4 preempt
//配置占先权(台交换机vlan51网关备份路由设备)
3560_1(config)#udld aggsive
//启udld,并设置aggsive模式产单通down
3560_1(config)#interface range g1/1-2
3560_1(config-if)#udld port aggsive
//接口启udld