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下面是局域网的核心交换机（三层交换）和二层交换之间的端口聚合的操作实例：
2950 Switch>en Switch#conf t Enter configuration commands,one per line. End with CNTL/Z. Switch(config)#int f0/1 Switch(config-if)#channel-group 1 mode on %LINK-5-CHANGED: Interface Port-channel 1,changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel 1,changed state to upSwitch(config-if)#int f0/2 Switch(config-if)#channel-group 1 mode on 3560 Switch(config)#int port-channel 1 Switch(config-if)#exit Switch(config)#ip routing(默认已经启用了路由功能) Switch(config)#int port-channel 1 Switch(config-if)#no switchport Switch(config-if)#ip add 1.1.1.1 255.0.0.0 Switch(config-if)#no shut Switch(config-if)#exit Switch(config)#int f0/1 Switch(config-if)#no switchport %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1,changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1,changed state to upSwitch(config-if)# Switch(config-if)#no ip add Switch(config-if)#channel-group 1 mode ? active Enable LACP unconditionally auto Enable PAgP only if a PAgP device is detected desirable Enable PAgP unconditionally on Enable Etherchannel only passive Enable LACP only if a LACP device is detected Switch(config-if)#channel-group 1 mode on %LINK-5-CHANGED: Interface Port-channel 1,changed state to upSwitch(config-if)# Switch(config-if)#int f0/2 Switch(config-if)#no switchport %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2,changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2,changed state to upSwitch(config-if)#no ip add Switch(config-if)#no ip address Switch(config-if)#channel-group 1 mode on Switch(config-if)#exit Switch(config)#int f0/3 Switch(config-if)#no switchport %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3,changed state to down %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3,changed state to upSwitch(config-if)#ip add 2.2.2.1 255.0.0.0 Switch(config-if)#no shut 端口聚合可使流量在多条物理链路上负载均衡，同时也起到了链路的备份作用。但是在某些设备里，应注意聚合链路两端接口的速率，工作模式，例如在快以中，可将各个端口设置为speed 100,duplex full。 （编辑：安卓应用网）
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