以太网通道的小实验
实验步骤：
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sw 0
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en
conf t
no ip do lo
line c 0
exec-t 0 0
logg sync
exit
int range f0/1 - 3
channel-group 1 mode on
exit
in range f0/4 - 15
spanning-tree portfast
exit
spanning-tree uplinkfast
end
copy running-config startup-config
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sw 1
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en
conf t
no ip do lo
line c 0
exec-t 0 0
logg sync
exit
int range f0/1 - 3
channel-group 1 mode on
exit
int range f0/1 - 3
spanning-tree portfast
exit
spanning-tree uplinkfast
end
write
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实施以太网通道时注意：必须各端口物理属性完全相同；
其工作属性也必须完全相同。
最多可以捆绑8条物理链路。
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Ether channel 作用：提高链路带宽，负载分担，相互备份。
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