单选题加快Catalyst 3548发生直接链路失效的收敛速度,正确配置生成树可选功能的命令是(  )。Aspanning-tree backbonefastBspanning-tree portfast defaultCspanning-tree uplinkfast max-update-rate 32000Dset spantree uplinkfast enable rate 40

单选题
加快Catalyst 3548发生直接链路失效的收敛速度,正确配置生成树可选功能的命令是(  )。
A

spanning-tree backbonefast

B

spanning-tree portfast default

C

spanning-tree uplinkfast max-update-rate 32000

D

set spantree uplinkfast enable rate 40


参考解析

解析:
uplinkfast的功能是当生成树拓扑结构发生变化和在使用上链路组的冗余链路之间完全负载平衡时,提供快速收敛,Catalyst 3548的命令格式为spanning-tree uplinkfast max-update rate <0—32000.>,因此选C。

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