Stp Port States; Configuring Bridge; Table 21 Stp Port States - ZyXEL Communications ZyWALL 5 User Manual

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Once a stable network topology has been established, all bridges listen for Hello BPDUs

(Bridge Protocol Data Units) transmitted from the root bridge. If a bridge does not get a Hello

BPDU after a predefined interval (Max Age), the bridge assumes that the link to the root

bridge is down. This bridge then initiates negotiations with other bridges to reconfigure the

network to re-establish a valid network topology.

5.2.4 STP Port States

STP assigns five port states (see next table) to eliminate packet looping. A bridge port is not

allowed to go directly from blocking state to forwarding state so as to eliminate transient

Select Bridge and click Apply in the MAINTENANCE Device Mode screen to have the

ZyWALL function as a bridge.

To change your ZyWALL's bridge settings, click BRIDGE. The screen appears as shown.

Chapter 5 Bridge Screens

STP is disabled (default).

Only configuration and management BPDUs are received and processed.

All BPDUs are received and processed.

All BPDUs are received and processed. Information frames are submitted to the

learning process but not forwarded.

All BPDUs are received and processed. All information frames are received and

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