以太网通道,通常称之为以太网链路捆绑,或者叫链路汇聚、链路聚合;
有如下作用:
将多个类似的接口,捆绑成一个逻辑接口,从而增加设备之间的传输带宽、增加设备之间的连接可靠性,而且可以在设备之间形成链路备份,还可以实现数据转发的负载均衡。
实验拓扑图:
由于STP(生成树协议)的作用,多层交换机1的f0/11和f0/12处于block(阻塞)状态,进行如下操作:
@交换机1:
Switch>enable
Switch#config t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#hostname SW1
SW1(config)#line con 0
SW1(config-line)#exec
SW1(config-line)#exec-timeout 0
SW1(config-line)#exit
SW1(config)#no ip domain lookup
SW1(config)#interface range f0/10-f0/12
SW1(config-if-range)#channel-group 1 mode on
SW1(config-if-range)#
Creating a port-channel interface Port-channel 1
%LINK-5-CHANGED: Interface Port-channel 1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel 1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/10, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/11, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/11, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/12, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/12, changed state to up
SW1(config-if-range)#exit
SW1(config)#do show ip interface brief
……
@可见到如下一行,表示以太网通道组建立成功
Port-channel 1 unassigned YES unset up up
@可对以太网通道组进行相关错作
SW1(config)#interface port-channel 1
SW1(config-if)#switchport trunk encapsulatio dot1q
SW1(config-if)#switchport mode trunk
SW1(config-if)#end
@对交换机2进行类似操作即可实现上文拓扑图的功能。
注意:
可以将多个2层链路捆绑在一起;
可以将多个3层链路捆绑在一起。