Hello,
i have a Mikrotik CCR 1036-8g-2S+ and i connect my upstream fiber to SFP1 and connect SFP2 to Cisco 3750G SFP1 Port and my provider told me i should filter bpdu because if they receive bpdu they will shutdown my switch port so can you tell me how can i filter bpdu on my mikrotik?
thanks

When you do not put your SFP1 interface in a bridge you will not send BPDU.

ok i undderstand , it happen in layer 2 so when i have bridge or when i have layer 3 switch it may happen bpdu right?
thanks

I don't understand what you write.

if port not added to bridge it does not send bpdu packet right?

That is correct