核心交换机(三层交换)和二层交换之间的端口聚合

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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:

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 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。

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