GS2210 Series User’s Guide
315
CHAPTER 35
BPDU Guard
35.1 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 8.7 on
page 72) or use the Errdisable Recovery screen (see Section 30.6 on page 278) to have the
port(s) become active after a certain time interval.
35.1.1 What You Can Do
•Use the BPDU Guard Status screen (Section 35.2 on page 315) to view the BPDU guard status.
•Use the BPDU Guard Configuration screen (Section 35.3 on page 316) to enable BPDU guard
on the Switch.
35.2 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.
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