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ali ezzat1
Beginner

BPDU Guard Not working and loops happen

Dears,

user takes a network cable and plugs it into two wall jacks,  this creates a loop, a broadcast storm will likely follow. This happened to us by having an end user hooking up their IP phone to two network jacks. It brought down the entire network.

and

- BPDU GUARD enabled globally 

- BPDU filter not enabled

- port fast enabled under access ports

 

switch C3750 connected to core c9500

logs 

 

STP-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV

 

Thanks to share the solution for this issue

1 REPLY 1
marce1000
VIP Advisor