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配置设备WEB IoU ，配置拓扑：

命令：

SW1(config)#interface port-channel 1 建立一个以太网port-channel 1

SW1(config-if)#switchport trunk encapsulation dot1q port-channel 1 中的接口trunk封装的类型 （35一下的貌似可以不用）

SW1(config-if)#switchport mode trunk port-channel 1 封装为trunk模式

SW1(config-if)#speed 100 设置port-channel 的端口速率

SW1(config-if)#duplex full 设置port-channel 的双工模式

SW1(config)#interface ethernet 0/0

SW1(config-if)#speed 100

SW1(config-if)#duplex full

SW1(config-if)#switchport trunk encapsulation dot1q

SW1(config-if)#switchport mode trunk

SW1(config-if)#channel-group 1 mode on 设置将接口加入channel-group 1中，并定义模式为手动聚合（ON不属于任何协议）

SW1(config)#interface ethernet 0/1

SW2 配置如上

查看命令

SW1#show etherchannel summary 查看端口聚合的汇总信息

Flags: D - down P - bundled in port-channel

I - stand-alone s - suspended

H - Hot-standby (LACP only)

R - Layer3 S - Layer2

U - in use N - not in use,no aggregation

f - Failed to allocate aggregator

M - not in use,no aggregation due to minimum links not met

m - not in use,port not aggregated due to minimum links not met

u - unsuitable for bundling

d - default port

w - waiting to be aggregated

Number of channel-groups in use: 1

Number of aggregators: 1

Group Port-channel Protocol Ports

------+-------------+-----------+-----------------------------------------------

1 Po1(SU) - Et0/0(P) Et0/1(P)

SW2#show etherchannel summary

Flags: D - down P - bundled in port-channel

I - stand-alone s - suspended

H - Hot-standby (LACP only)

R - Layer3 S - Layer2

U - in use N - not in use,port not aggregated due to minimum links not met

u - unsuitable for bundling

d - default port

w - waiting to be aggregated

Number of channel-groups in use: 1

Number of aggregators: 1

Group Port-channel Protocol Ports

------+-------------+-----------+-----------------------------------------------

1 Po1(SU) - Et0/0(s) Et0/1(P)

SW1(config-if)#channel-group 1 mode desirable 模式变为PAGP协议

SW1(config-if)#channel-group 1 mode active 模式变为LACP协议

SW2 对端依据协商模式来配置，

desirable-desirable

desirable-auto

active-active

active-passive