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标题: Cisco交换机链路聚合 [打印本页]

作者: admin 时间: 2015-12-10 17:00
标题: Cisco交换机链路聚合
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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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

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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 up

%LINEPROTO-5-UPDOWN: Line protocol on 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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