desirable（主动）------- active
以上来自互联网
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
