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STP port "flapping"

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penghon

penghon

MIS
Jul 22, 2003
41
SG
Does anyone have an idea why does this mean?

12:14:42 %PAGP-5-PORTTOSTP:pORT 2/28 joined bridge port 2/28
12:14:25 %PAGP-5-PORTFROMSTP:pORT 2/28 left bridge port 2/28

Does this mean that the port is "flapping"? Or changing from forwarding->blocking->forwarding?
 
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Both STP is running and the port is losing connection and then coming back , can be caused by duplex mismatches or nic autonegotiation problems with cisco equipment .
 
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