Bpdu Guard; Chapter 35 Bpdu Guard; Bpdu Guard Overview; What You Can Do - ZyXEL Communications GS2210 Series User Manual

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
page 72) or use the Errdisable Recovery screen (see
port(s) become active after a certain time interval.

35.1.1 What You Can Do

• Use the BPDU Guard Status screen
• Use the BPDU Guard Configuration screen
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.
C
HAPTER
Section 30.6 on page
(Section 35.2 on page
(Section 35.3 on page
GS2210 Series User's Guide
315

BPDU Guard

(Section 8.7 on
278) to have the
315) to view the BPDU guard status.
316) to enable BPDU guard
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