ZyXEL Communications GS3700 Series - BPDU Guard; BPDU Guard Overview; What You Can Do with BPDU Guard; BPDU Guard Status

GS3700/XGS3700 Series User’s Guide
378
CHAPTER 37
BPDU Guard
37.1 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 port(s) on which BPDU guard is enabled, the Switch disables the port(s) automatically. You
can then enable the port(s) manually in the Basic Setting > Port Setup screen (
Section 6.6 on
page 69) or use the Errdisable Recovery screen (see Section 31.6 on page 331) to have the
port(s) become active after a certain time interval.
37.1.1 What You Can Do
• Use the BPDU Guard Status screen (
Section 37.2 on page 378) to view the BPDU guard status.
• Use the BPDU Guard Configuration screen (
Section 37.3 on page 379) to enable BPDU guard
on the Switch.
37.2 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.