,使用S2950收不到BPDU,形成环路。sw3#shrunintg1/0/1/0/11spanning-treebpdufilterenables2950#(0/10)HelloTime2secMaxAge20secForwardDelay15secBridgeIDPriority32769(priority32768sys-id-ext1)------------------------------------------------------------------------Fa0//#------------------------------------------------------------------------Fa0//#------------------------------------------------------------------------Fa0//→二层环路,,在S2950上启用guardloops2950#shrunintf
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