Bpdu Guard; Chapter 37 Bpdu Guard; Bpdu Guard Overview; What You Can Do - ZyXEL Communications XGS2210-28 User Manual

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
Recovery screen (see
interval.

37.1.1 What You Can Do

• Use the BPDU Guard Status screen
• Use the BPDU Guard Configuration screen
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.
Section 31.6 on page 329) to have the port(s) become active after a certain time
(Section 37.2 on page
(Section 37.3 on page
XGS2210 Series User's Guide
376
C
H A P T E R

BPDU Guard

(Section 8.7 on page 75) or use the Errdisable
376) to view the BPDU guard status.
378) to enable BPDU guard on the
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