The notice matters for static lacp convergence of S9300 and S3300 switch
1. Do bpdu enable on aggregation interface, it can receive and process lacp protocol packet.
2. Under S9300 aggregation team, bpdu enable is defaultly opened.
3. S3300 switch bpdu is defaultly closed (particularly before the physics interface add to aggregation team,firstly bpdu disable, it is easy to forget bpdu enable under aggregation team)