Etherchannel 配置

端口聚合协议(PAgP)--------思科私有

和链路聚合控制协议（LACP）---------IEEE 802.3ad

PAgP模式

desirable：主动询问对端是否参与

Auto：被动等待对端

SW1	SW2	channel establishment
on	on	yes
auto/desirable	desirable	yes
on/auto/desirable	no configured	no
on	desirable	no
auto/on	auto	no

LACP模式

Active:主动询问另一端是否能参与

Passive:被动等候另一端

SW1	SW2	channel establishment
on	on	yes
acitve/passive	active	yes
on/active/passive	no configured	no
on	active	no
passive/on	passive	no

基于LACP配置ehterchannel

SW1

S1(config)#interface range fa0/1-2

S1(config-if-range)#channel-group 1 mode active

S1(config-if-range)#interface port-channel 1

S1(config-if)#switchport trunk encapsulation dot1q

S1(config-if)#switchport mode trunk

S1(config-if)#switchport trunk allowed vlan all

SW2

S2(config)#interface range fa0/1-2

S2(config-if-range)#channel-group 1 mode active

S2(config-if-range)#interface port-channel 1

S2(config-if)#switchport trunk encapsulation dot1q

S2(config-if)#switchport mode trunk

S2(config-if)#switchport trunk allowed vlan all

验证