Chapter 38 BPDU Guard
GS2220 Series User’s Guide
344
C HAPTER 38
BPDU G ua rd
38.1 BPDU G ua rd O ve rvie w
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 Ba sic Se tting > Po rt Se tup screen, or use the Errdisa ble Re c ove ry screen (see
Section 33.6 on page 313) to have the ports become active after a certain time interval.
38.1.1 Wha t You C a n Do
• Use the BPDU G ua rd Sta tus screen (
Section 38.2 on page 344) to view the BPDU guard status.
• Use the BPDU G ua rd Co nfig ura tio n screen (
Section 38.3 on page 345) to enable BPDU guard on the
Switch.
38.2 BPDU G ua rd Sta tus
Use this screen to view whether BPDU guard is enabled on the Switch and the port status. Click
Adva nc e d Applic a tio n > BPDU G ua rd in the navigation panel.
Fig ure 261 Advanced Application > BPDU Guard Status
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