Hi to all,
I got a new C3750 installed on my network, which runs MSTP implementation against Allied-Telesyn switches using also MSTP.
I have no problems in the past with MSTP using other brands, but now I do have a issue when I plug the C3750.
When I connect the switch i receive this message:
%SPANTREE-2-PVSTSIM_FAIL: Blocking root port Fa1/0/1: Inconsistent inferior PVST BPD
U received on VLAN 121, claiming root 32768:0013.7f74.b133
As you can see, the error is similar to a few listed in the "Error Messages" from this IOS, but instead report that a "inferior PVST BPD" is claiming that is a root. My core switch got a priority of 0 (zero) so it will always be the highest prio one, but seems that this client got also a Cisco switch and certain feature is affecting my C3750 (this doesn't happen on the AT switches, which are working good and doesn't suffer any problem).
Do you have any ideas hold I could resolve this thing? (avoiding the popular "BPDU filtering" cause it could trigger worse things like unknow loops.
Best regards to all,