ZyXEL Communications XGS4600 Series - BPDU Guard; BPDU Guard Overview; BPDU Guard Status; Chapter 42 BPDU Guard

Chapter 42 BPDU Guard
XGS4600 Series User’s Guide
409
CHAPTER 42
BPDU Guard
42.1 BPDU Guard Overview
A BPDU (Bridge Protocol Data Units) is a data frame that contains information about STP. STP-aware
switches exchange BPDUs periodically.
The BPDU guard feature allows you to prevent any new STP-aware switch from connecting to an existing
network and causing STP topology changes in the network. If there is any BPDU detected on the ports
on which BPDU guard is enabled, the Switch disables the ports automatically. You can then enable the
ports manually in the Basic Setting > Port Setup screen, or use the Errdisable Recovery screen (see
Section 35.6 on page 362) to have the ports become active after a certain time interval.
42.1.1 What You Can Do
• Use the BPDU Guard Status screen (Section 42.2 on page 409) to view the BPDU guard status.
• Use the BPDU Guard Configuration screen (Section 42.3 on page 410) to enable BPDU guard on the
Switch.
42.2 BPDU Guard Status
Use this screen to view whether BPDU guard is enabled on the Switch and the port status. Click
Advanced Application > BPDU Guard in the navigation panel.
Figure 327 Advanced Application > BPDU Guard Status (Standalone Mode)