- Gold, 750 points or more
when a switch interface receoved a PRE-STD BPDU is create an error message and teh receiving interface has to be configured to only accept PRE-STD bpdus.
I am running MST/RSTP between my switches.
However, this is happening to me even if the sending switch is actually a new 3750 and running an IOS that I know uses IEEE MST format.
Why woudl a new switch with new IOS send PRE-STD bpdud?
Well, nothing much more that what I mentioned previously. A standard switch only sends pre-standard bpdus on an interface:
-if it has received a pre-standard bpdu on the interface
-or if it is explicitly configured to send pre-standard bpdu on this interface.
If you see another behavior, it's a bug!